KIT WITH PILLOW SLEEVES OF A SINGLE LENGTH AND DIFFERENT WIDTHS FOR USER-SELECTABLE COMPRESSION PRESSURE, FILL DENSITY, FIRMNESS, AND HEIGHT

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to and the benefit of the provisional patent application titled “A Stuffed Pillow and Rectangular Pillow Sleeves of Lengths L-1 and Widths W-1, W-2, W-3, and W-4, for a User Selectable Compression Pressure, Fill Density, and Height, to Achieve Individual User Comfort”, application No. 63/638,947, filed in the United States Patent and Trademark Office on Apr. 26, 2024. The specification of the above-referenced patent application is incorporated herein by reference in its entirety.

BACKGROUND

Many different types of pillows are made and marketed, including pillows with inserts that adjust the height of the pillow, or pillows that use different materials to provide a user with a different firmness. Pillows are manufactured in several different ways. For example, pillows are formed of a top sheet of material and a bottom sheet of material that are joined around their outer periphery. Some pillows include a connection means between the top and bottom sheets of material, comprising, for example, stitching, buttons, zippers, etc. Pillow protectors may be provided to protect the outer fabric of the pillows inserted thereinto. Some pillow protectors include a premium, smooth zipper to prevent the user from feeling the zipper when the pillow protector is closed and in use.

Pillows are typically filled with materials of different types, for example, natural materials such as cotton, wool, duck or goose down and feathers, buckwheat, etc., and synthetic materials such as memory foam, siliconized polyester fibers, microfibers, etc. Cotton filling provides a firmer, flatter pillow that generally holds its shape well. Cotton is also cooler and breathes better than other materials. Wool provides a fuller feeling pillow and is durable, maintains warmth, and absorbs moisture away from the surface of the pillow. Down pillows are the softest and provide an airy feeling to the user.

Pillows are typically used for comfortably positioning and resting a user's head or another body part during sleep or other resting activities. For a pillow to be comfortable throughout the sleeping or resting time, the pillow must support the user's neck and head to facilitate a generally straight alignment of the user's spine. Conventional pillows are typically of a rectangular shape and are manufactured in one of only a few sizes, for example, a standard size, a queen size, and a king size. In an example, a conventional pillow of a standard size has a width of about 20 inches and a length of about 26 inches; a conventional pillow of a queen size has a width of about 20 inches and a length of about 30 inches; and a conventional pillow of a king size has a width of about 20 inches and a length of about 36 inches. A conventional pillow is typically manufactured with a uniform fill material. If the user's head is resting on a conventional pillow that is too thin or too low, the neck of the user lying sideways may bend in a downward direction. To maintain the side-lying user's neck at a straight alignment, a thicker or stiffer pillow must be used to provide higher support when the user's head is resting on the pillow. However, when the pillow is too thick or when the user stacks two pillows one on top of the other, the neck of the user bends in an upward direction, which may pinch various nerves in the neck and cause pain in the upper body of the user. The user may attempt to compensate for the thickness of the pillow, for example, by folding the pillow, or placing the user's arm under the pillow, or stacking pillows to obtain a proper height. An improper height of the pillow causes discomfort and lack of rest or a good night's sleep. Conventional pillows do not allow for height adjustment tailored to a specific user's preference, which may change depending on the user's sleeping position.

Furthermore, when the user's head rests on a conventional pillow during sleeping or resting time, the fill material of the conventional pillow compresses substantially over time, or may migrate out from under the user's head, causing the conventional pillow to change shape, gradually reduce its height, and flatten out, when the user is resting or at sleep. Consequently, the user has to re-fluff and re-adjust the pillow several times during rest or sleep. The user may also attempt to compensate for the compression of the pillow by stacking multiple pillows on top of the other which leads to further substantial compression of the pillow and discomfort or inconvenience to the user who requires support during sleep or rest.

One conventional method for providing a comfortable shape and feel of a pillow to the user is to introduce multiple inserts into a pillow case to alter the shape and the feel of the pillow. The inserts have specific sizes that allow the user to vary the weight or the height of the pillow to provide the user with a substantial amount of variability. However, this conventional method is not cost-effective and having to combine two or more inserts, each having a different fill density and height, according to the user's preferences would be difficult and time consuming. As used herein, “fill density” refers to the weight of the fill material in the pillow divided by the volume of the space within the pillow. Higher the fill density in the pillow, higher is the firmness of the pillow. Lower the fill density in the pillow, softer is the feel when the user's head rests on the pillow.

Prolonged use of conventional pillows and constant readjustment can change their shape and support, making the pillows uncomfortable to use. This discomfort can render the pillows unusable, leading users to buy new pillows frequently, sometimes every 2-3 months. Therefore, there is an unmet need for pillow sleeves with different widths that compress and hold the filling material more tightly. Such pillow sleeves would maintain a user-selected firmness and height of the pillow, preventing the pillow from flattening out during use and reducing the need for frequent replacement of the pillow.

Hence, there is a long-felt need for a method and a pillow sleeve kit comprising a predetermined number of pillow sleeves of a single length selectable based on size of a pillow to be inserted thereinto, where the pillow sleeves are of different widths, for providing a user-selectable compression pressure, fill density, firmness, and height based on individual user comfort, while addressing the above-recited problems of the related art.

BRIEF DESCRIPTION OF THE DRAWINGS

The following detailed description of the invention is better understood when read in conjunction with the appended drawings. For illustrating the embodiments herein, exemplary constructions of the embodiments are shown in the drawings. However, the embodiments herein are not limited to the specific components, structures, and methods disclosed herein. In an embodiment, various structural elements are employed depending on design choices of a system designer. The description of a component, or a structure, or a method step referenced by a numeral in a drawing is applicable to the description of that component, or structure, or method step shown by that same numeral in any subsequent drawing herein. The terms “side”, “top”, “interior”, “inner”, etc., are based on an orientation or a positional relationship shown in the appended drawings, and are recited merely for describing the embodiments herein, rather than indicating or implying that the device, component, or structure referenced must have a particular orientation or position or must be constructed and operated in a particular orientation, and therefore should not be construed as limiting the embodiments herein.

FIG. 1 illustrates an embodiment of a pillow sleeve kit comprising a predetermined number of pillow sleeves of a single length and of different widths.

FIG. 2 illustrates a top perspective view of a rectangular pillow sleeve, showing insertion of a pillow into an interior cavity of the rectangular pillow sleeve.

FIGS. 3A-3D illustrate top perspective views of four assembled pillows comprising a pillow of a single size assembled in each of four rectangular pillow sleeves having the same length and four different widths, providing user-selectable compression pressures, fill densities, firmness, and heights.

FIGS. 4A-4D illustrate side elevation views of four assembled pillows comprising a pillow of a single size assembled in each of four rectangular pillow sleeves having the same length and four different widths and providing four different heights.

FIG. 5A illustrates a top perspective view of an embodiment of a pillow sleeve with a zipper in an open condition.

FIG. 5B illustrates a top perspective view of the embodiment of the pillow sleeve with the zipper in the open condition shown in FIG. 5A, showing positioning of a pillow for assembly thereinto.

FIG. 5C illustrates a top perspective view of an embodiment of an assembled pillow created by inserting the pillow into an interior cavity of the pillow sleeve shown in FIGS. 5A-5B, and fastening the zipper.

FIG. 6A illustrates a top perspective view of an embodiment of a pillow sleeve with a zipper in an open condition and flaps attached along an inner boundary of a bottom member of the pillow sleeve.

FIG. 6B illustrates a top perspective view of the embodiment of the pillow sleeve with the zipper in the open condition and the flaps shown in FIG. 6A, showing positioning of a pillow for assembly thereinto.

FIG. 6C illustrates a top perspective view of the embodiment of the pillow sleeve with the zipper in the open condition and the flaps shown in FIG. 6A, showing the pillow tucked under the flaps.

FIG. 6D illustrates a top perspective view of an embodiment of an assembled pillow created by inserting the pillow into an interior cavity of the pillow sleeve shown in FIGS. 6A-6B, and fastening the zipper.

FIG. 7A illustrates a top perspective view of an embodiment of the pillow sleeve with three zippers in an open condition, showing positioning of a pillow for assembly thereinto.

FIG. 7B illustrates a top perspective view of an embodiment of an assembled pillow created by inserting the pillow into an interior cavity of the pillow sleeve shown in FIG. 7A, and fastening the three zippers.

FIG. 8A illustrates a flowchart of an embodiment of a method for obtaining a user-selectable compression pressure, fill density, firmness, and height in a pillow based on individual user comfort.

FIG. 8B illustrates a flowchart of another embodiment of a method for obtaining a user-selectable compression pressure, fill density, firmness, and height in a pillow based on individual user comfort.

DETAILED DESCRIPTION OF THE INVENTION

The method and the apparatus disclosed herein address the above-recited needs for a method and for a pillow sleeve kit 100 comprising a predetermined number of pillow sleeves 101, 102, 103, and 104 of a single length selectable based on a size of a pillow 201 to be inserted thereinto as illustrated in FIGS. 1-2, where the pillow sleeves 101, 102, 103, and 104 are of different widths for providing a user-selectable compression pressure, fill density, firmness, and height to the pillow 201 based on individual user comfort. The pillow 201 is stuffed with fill material of one or more types, for example, natural materials such as cotton, wool, latex, duck or goose down and feathers, buckwheat, kapok fibers, etc., and synthetic materials such as memory foam, siliconized polyester fibers, polyester fiberfill, microfibers, microbeads, etc. The pillow sleeves 101, 102, 103, and 104 are made from different materials, for example, cotton, polyester, silk, bamboo-derived fabrics, linen, microfibers, etc., or any combination thereof.

FIG. 1 illustrates an embodiment of a pillow sleeve kit 100 comprising a predetermined number of pillow sleeves, for example, four pillow sleeves 101, 102, 103, and 104, of a single length and of different widths. In an embodiment, each of the pillow sleeves 101, 102, 103, and 104 is of a rectangular shape. The pillow sleeves 101, 102, 103, and 104 are of a single length selectable based on a size of a pillow 201 to be inserted thereinto as illustrated in FIG. 2. The pillow sleeves 101, 102, 103, and 104 are of different widths configured to provide a user-selectable compression pressure, fill density, firmness, and height to the pillow 201 based on individual user comfort. As used herein, “compression pressure” refers to a force exerted on the surface of a pillow 201 when the pillow 201 is compressed, which impacts firmness or softness of the pillow 201 and support provided by the pillow 201. Fill density is a measure of the compactness of the fill material within the pillow 201. When a user rests his or her head on a pillow 201, the user's head and neck apply pressure to the pillow 201, which compresses the fill material of the pillow 201. The compression pressure is the resistance the pillow 201 provides against pressure applied by the user's head and neck during rest or sleep thereon, influencing overall feel and ability of the pillow 201 to maintain a proper alignment of the user's spine during sleep.

The size of the pillow 201 is one of a standard size, a queen size, and a king size. Accordingly, the length of each of the pillow sleeves 101, 102, 103, and 104 is one of a standard size length, a queen size length, and a king size length. In an example, the standard size length is about 25 inches; the queen size length is about 29 inches; and the king size length is about 35 inches. In an embodiment, the width of each of the pillow sleeves 101, 102, 103, and 104 is varied to provide the user-selectable compression pressure, fill density, firmness, and height. The compression pressure, the fill density, the firmness, and the height of the pillow 201 are varied by inserting the pillow 201 into each of the pillow sleeves 101, 102, 103, and 104 of a single length and different widths. In an embodiment as illustrated in FIG. 1, a zipper 105 is provided on one of the sides of each of the pillow sleeves 101, 102, 103, and 104. In an embodiment, each of the pillow sleeves 101, 102, 103, and 104 are configured as tight-fitting pillow cover or a compression pillow encasement with a zipper closure disposed at one side. A different compression pressure, a different fill density, a different firmness, and a different height are provided by assembling the pillow 201 in each of the pillow sleeves 101, 102, 103, and 104 of the single length and the different widths as disclosed in the descriptions of FIGS. 3A-3D and FIGS. 4A-4D. As used herein, “assembling the pillow” refers to inserting the pillow 201 into a pillow sleeve 101/102/103/104 and closing and fastening the pillow 201 therewithin using the zipper 105.

Most users typically use rectangular pillows 201 of the same size, for example, either a standard size or a queen size or a king size, on their beds. In an embodiment, the pillow sleeve kit 100 provides four rectangular pillow sleeves 101, 102, 103, and 104 with the same length, for example, either a standard size length, a queen size length, or a king size length and with different widths as illustrated in FIG. 1, FIGS. 3A-3D, and FIGS. 4A-4D. Although the detailed description refers to a pillow sleeve kit 100 with four pillow sleeves 101, 102, 103, and 104, the pillow sleeve kit 100 disclosed herein is not limited to including four pillow sleeves 101, 102, 103, and 104, but extends to include any number of pillow sleeves of the same single length and multiple different widths, based on user preferences.

The pillow sleeves 101, 102, 103, and 104 in the pillow sleeve kit 100 are configured with a single length to fit pillows 201 that the user already has. In an example, if the user has standard sized-pillows, each of the same length of about 26 inches, the user can order the pillow sleeve kit 100 comprising a set of four pillow sleeves 101, 102, 103, and 104 having the same standard size length of about 25 inches, but with four different widths. In another example, if the user has queen sized-pillows, each of the same length of about 30 inches, the user can order the pillow sleeve kit 100 comprising a set of four pillow sleeves 101, 102, 103, and 104 having the same queen size length of about 29 inches, but with four different widths. In another example, if the user has king sized-pillows, each of the same length of about 36 inches, the user can order the pillow sleeve kit 100 comprising a set of four pillow sleeves 101, 102, 103, and 104 having the same king size length of about 35 inches, but with four different widths. In an embodiment, the single length of each of the pillow sleeves 101, 102, 103, and 104 is configured to be less than the length of the pillow 201, to allow each of the pillow sleeves 101, 102, 103, and 104 to fully and tightly accommodate the pillow 201 therewithin, with a slight compression on a longitudinal axis. For example, for a standard size pillow of length 26 inches, the single length of each of the pillow sleeves 101, 102, 103, and 104 is about 25 inches; for a queen size pillow of length 30 inches, the single length of each of the pillow sleeves 101, 102, 103, and 104 is about 29 inches; and for a king size pillow of length 36 inches, the single length of each of the pillow sleeves 101, 102, 103, and 104 is about 35 inches, which provides compression on the longitudinal axis of the pillow 201. The different widths of the pillow sleeves 101, 102, 103, and 104 provide the fill material of the pillow 201 inserted thereinto with different amounts of compression on the lateral axis and render different heights to the inserted pillow 201.

In an example, for a pillow 201 of a standard size (S) having a width of about 20 inches and a length of about 26 inches, the pillow sleeves 101, 102, 103, and 104 in the pillow sleeve kit 100 are provided with a single length of about 25 inches and four different widths of about 16 inches, 17 inches, 18 inches, and 19 inches, which provide four different compression pressures SP1, SP2, SP3, and SP4, respectively, and render four different heights SH1, SH2, SH3, and SH4 for the standard size pillow.

In another example, for a pillow 201 of a queen size (Q) having a width of about 20 inches and a length of about 30 inches, the pillow sleeves 101, 102, 103, and 104 in the pillow sleeve kit 100 are provided with a single length of about 29 inches and four different widths of about 16 inches, 17 inches, 18 inches, and 19 inches, which provide four different compression pressures QP1, QP2, QP3, and QP4, and render four different heights QH1, QH2, QH3, and QH4 for the queen size pillow.

In another example, for a pillow 201 of a king size (K) having a width of about 20 inches and a length of about 36 inches, the pillow sleeves 101, 102, 103, and 104 in the pillow sleeve kit 100 are provided with a single length of about 35 inches and four different widths of about 16 inches, 17 inches, 18 inches, and 19 inches, which provide four different compression pressures KP1, KP2, KP3, and KP4, and render four different heights KH1, KH2, KH3, and KH4 for the king size pillow.

Therefore, in the above examples, the pillow sleeves 101, 102, 103, and 104 are provided in the pillow sleeve kit 100 as a pack of four pillow sleeves 101, 102, 103, and 104 with different widths. That is, a standard four pack-pillow sleeve kit comprises four standard size pillow sleeves in four widths; a queen four pack-pillow sleeve kit comprises four queen size pillow sleeves in four widths; and a king four pack-pillow sleeve kit comprises four king size pillow sleeves in four widths. The pillow sleeve kit 100 allows the user to customize his or her standard size or queen size or king size pillow based on the user's preference by merely changing the pillow sleeve. Therefore, the user may select and adjust the compression and height of the pillow 201 by selecting pillow sleeves of a slightly reduced single length and different widths.

When the user inserts the pillow 201 into a pillow sleeve with a narrow width, for example, the pillow sleeve 103 or 104, as illustrated in FIG. 1, the pillow sleeve compresses the fill material of the pillow 201 more tightly against the sides of the pillow 201. The compression of the fill material increases the density of the fill material in those areas, making the pillow 201 feel firmer. Moreover, the pillow sleeve with a narrow width also restricts the natural expansion and migration of the fill material contained in the pillow 201. When the fill material is compressed within a narrower space rendered by a narrower pillow sleeve, the fill material will be compressed within a smaller pillow volume, resulting in a firmer feel. Furthermore, in an embodiment, the pillow sleeve with a narrower width maintains a substantially more uniform fill material density throughout the pillow 201. With less space for the fill material to expand into or migrate from under the user's head and neck, the fill material remains uniformly distributed in the narrower confined space of the narrower pillow sleeve, providing a higher fill density and firmer support and density across the entire surface of the pillow 201. The pillow sleeves 101, 102, 103, and 104 of different widths in the pillow sleeve kit 100, therefore, impact the fill density of the pillow 201 by either increasing compression and density or by restricting expansion and migration, depending on the type of fill material and how the fill material responds to being confined in a variable space provided by the pillow sleeves 101, 102, 103, and 104 of different widths. Each of the pillow sleeves 101, 102, 103, and 104 compresses the fill material in the pillow 201, allowing the firmness of the pillow 201 to be adjustable by using the pillow sleeves 101, 102, 103, and 104 of different widths to obtain a customized fit. The firmness of the pillow 201 within is adjusted from using the pillow sleeve 101 which provides an assembled pillow 301 with the least relative firmness as illustrated in FIG. 3A, to using the pillow sleeve 104 which provides an assembled pillow 304 with the most relative firmness as illustrated in FIG. 3D. The pillow sleeves 101, 102, 103, and 104 of different widths in the pillow sleeve kit 100, therefore, allows the user to select and adjust compression pressure, fill density, firmness, and height of the pillow 201 based on individual user comfort. The pillow sleeve kit 100 with a predetermined number of pillow sleeves 101, 102, 103, and 104 of the same length and of different widths allows the user to instantly change the amount of filling compression based on user preferences. If the user is unsatisfied with the compression pressure, fill density, firmness, and height provided to the pillow 201 by the width of one pillow sleeve, for example, a width of about 19 inches of the pillow sleeve 101, the user may select another pillow sleeve, for example, 102, 103, or 104 with a different width of about 18 inches, or 17 inches, or 16 inches, respectively, to obtain the desired firmness, compression pressure, fill density, and pillow height. The pillow sleeve kit 100 allows the user to adjust the firmness of their pillow 201 by selecting any of the pillow sleeves 101, 102, 103, and 104 with the decreasing widths. If one pillow sleeve is too flat or too high, the user may select another pillow sleeve of a different width to obtain more or less compression and pillow height until the user finds the right pillow sleeve to suit for their desired firmness.

FIG. 2 illustrates a top perspective view of a rectangular pillow sleeve 101/102/103/104, showing insertion of a pillow 201 into an interior cavity 106 of the rectangular pillow sleeve 101/102/103/104. In an embodiment, the zipper 105 is disposed on one side of the pillow sleeve 101/102/103/104. The zipper 105 in an open condition is configured to allow insertion of the pillow 201 into the interior cavity 106 of the rectangular pillow sleeve 101/102/103/104 of the same single length and the different widths to obtain an assembled pillow 301/302/303/304 in a closed condition with a user-selected compression pressure, fill density, firmness, and height as illustrated in FIGS. 3A-3D. As the space within the pillow 201 is decreased by the use of narrower width pillow sleeves, for the same amount of the fill material within the pillow 201, the fill density of the pillow 201 will increase, which in turn, will increase the firmness of the assembled pillow. The zipper 105 extends till the corner of one side of the pillow sleeve 101/102/103/104 to allow convenient insertion of a pillow 201 with an increased width into the interior cavity 106 of the rectangular pillow sleeve 101/102/103/104. A user opens the zipper 105 to expose the interior cavity 106 of the rectangular pillow sleeve 101/102/103/104 and inserts the pillow 201 into the interior cavity 106 of the rectangular pillow sleeve 101/102/103/104 in the direction of the arrow illustrated in FIG. 2. That is, the user inserts the pillow 201 through one side of any of the pillow sleeves 101, 102, 103, and 104 and zips up the pillow sleeve 101, 102, 103, or 104 to encase the pillow 201 within any of the pillow sleeves 101, 102, 103, and 104.

FIGS. 3A-3D illustrate top perspective views of four assembled pillows 301, 302, 303, and 304 comprising a pillow 201 of a single size assembled in each of four rectangular pillow sleeves 101, 102, 103, and 104 having the same length and four different widths, providing user-selectable compression pressures, fill densities, firmness, and heights. A user customizes the same pillow 201 of the single size, for example, either a standard size, or a queen size, or a king size, in four different ways by opening the zippers 105 of the four rectangular pillow sleeves 101, 102, 103, and 104 having four different widths selectable from XW-1, XW-2, XW-3, and XW-4 as illustrated in FIGS. 3A-3D, respectively; inserting the same pillow 201 into each of the interior cavities 106 of the rectangular pillow sleeves 101, 102, 103, and 104 illustrated in FIG. 2; and closing the zippers 105 to obtain the assembled pillows 301, 302, 303, and 304. XW-1, XW-2, XW-3, and XW-4 denote four different widths of type X, where X is one of a standard size, a queen size, and a king size. Although the lengths of the four rectangular pillow sleeves 101, 102, 103, and 104 are the same, the four different widths XW-1, XW-2, XW-3, and XW-4 of the rectangular pillow sleeves 101, 102, 103, and 104, respectively, provide different compression pressures, different fill densities, and different heights XH1, XH2, XH3, and XH4, respectively. XH1, XH2, XH3, and XH4 are the heights of the assembled pillows 301, 302, 303, and 304 of size X, respectively. In an embodiment, the pillow sleeves 101, 102, 103, and 104 are made of an elastic material to provide the user-selected compression pressure to the assembled pillows 301, 302, 303, and 304, respectively. In another embodiment, the pillow sleeves 101, 102, 103, and 104 are made of an inelastic material to provide the user-selected compression pressure to the assembled pillows 301, 302, 303, and 304.

The length (XL-1) of each of the pillow sleeves 101, 102, 103, and 104 is one of a standard size length (SL-1), a queen size length (QL-1), and a king size length (KL-1). Each of the pillow sleeves 101, 102, 103, and 104 comprises a top member 101a/102a/103a/104a and a bottom member 101b/102b/103b/104b attached to each other to define an interior cavity 106 for receiving the pillow 201 as illustrated in FIG. 2. In an embodiment, three sides 101c, 101d, and 101e of each of the top member 101a and the bottom member 101b of the pillow sleeve 101 are attached to each other by seams, and a fourth side 101f of each of the top member 101a and the bottom member 101b of the pillow sleeve 101 is attached by the zipper 105 as illustrated in FIG. 3A. Similarly, three sides 102c/103c/104c, 102d/103d/104d, and 102e/103e/104e of each of the top member 102a/103a/104a and the bottom member 102b/103b/104b of the pillow sleeve 102/103/104 are attached to each other by seams, and a fourth side 102f/103f/104f of each of the top member 102a/103a/104a and the bottom member 102b/103b/104b of the pillow sleeve 102/103/104 is attached by the zipper 105 as illustrated in FIGS. 3B-3D. The zipper 105 comprises a pull tab 105a and a chain 105b. The chain 105b of the zipper 105 extends along the fourth side 101f/102f/103f/104f of each of the top member 101a/102a/103a/104a and the bottom member 101b/102b/103b/104b of the pillow sleeve 101 and meets the pull tab 105a of the zipper 105.

The compression pressure of the assembled pillow 301/302/303/304 is inversely proportional to the volume of the assembled pillow 301/302/303/304. The fill density is also inversely proportional to the volume of the assembled pillow 301/302/303/304. When the width of the pillow 201 is limited, the internal volume decreases, making the fill density of the pillow 201 increase. This higher fill density pushes outward and causes the pillow 201 to expand in the direction of least resistance, which is the upward direction. The height of the pillow 201 will keep increasing until the outward pressure from the fill density is balanced by the resistance in height. Therefore, the narrower the pillow sleeve, the higher the fill density and the greater the height. When the fill material of the pillow 201 filling is compressed, by using a smaller pillow sleeve for the same amount of fill material, the volume decreases, causing the fill density to increase proportionally. The length, width, fill density, height, and mass of the assembled pillow 301/302/303/304 are related by a predefined formula as follows:

( XL - 1 ) × ( XW - 1 ) × ( XD ⁢ 1 ) × ( XH ⁢ 1 ) = ( XL - 1 ) × ( XW - 2 ) × ( XD ⁢ 2 ) × ( XH ⁢ 2 ) = ( XL - 1 ) × ( XW - 3 ) × ( XD ⁢ 3 ) × ( XH ⁢ 3 ) = ( XL - 1 ) × ( XW - 4 ) × ( XD ⁢ 4 ) × ( XH ⁢ 4 ) = … = ( XL - 1 ) × ( XW - N ) × ( XDN ) × ( XHN ) = XM ;

wherein,

• • XL and XW are the length and the width of the pillow 201 of size X that is inserted into each of the pillow sleeves of “N” different widths of type X, respectively;
  • XD1, XD2, XD3, XD4, . . . , XDN are fill densities of the pillow 201 of size X after assembling the pillow 201 of size X in each of the pillow sleeves of length (XL-1) and widths (XW-1), (XW-2), (XW-3), (XW-4), . . . , (XW-N), respectively;
  • XH1, XH2, XH3, XH4, . . . , XHN are heights of the pillow 201 of size X after assembling the pillow 201 of size X in each of the pillow sleeves of length (XL-1) and widths (XW-1), (XW-2), (XW-3), (XW-4), . . . , (XW-N), respectively;
  • XM is mass of the pillow 201 of size X; and
  • X is one of a standard size (S), a queen size (Q), and a king size (K) of the pillow 201.

For purposes of illustration, the pillow sleeve kit 100 in the following examples comprises four pillow sleeves of a single length and of four different widths XW-1, XW-2, XW-3, and XW-4, that provide four different compression pressures XP1, XP2, XP3, and XP4, four different fill densities XD1, XD2, XD3, and XD4, and four different heights XH1, XH2, XH3, and XH4. However, the scope of the pillow sleeve kit 100 disclosed herein is not limited to comprising four pillow sleeves 101, 102, 103, and 104 of a single length and of four different widths XW-1, XW-2, XW-3, and XW-4, but extends to include any number of pillow sleeves of a single length and of any number of different widths.

In an example, the length, width, the fill density, the height, and mass of the assembled pillow 301/302/303/304 comprising a pillow 201 of the standard size (S) inserted into each of the pillow sleeves 101, 102, 103, and 104 of the standard size length (SL-1) and of different widths SW-1, SW-2, SW-3, and SW-4 are related by the following predefined formula:

( SL - 1 ) × ( SW - 1 ) × ( SD ⁢ 1 ) × ( SH ⁢ 1 ) = ( SL - 1 ) × ( SW - 2 ) × ( SD ⁢ 2 ) × ( SH ⁢ 2 ) = ( SL - 1 ) × ( SW - 3 ) × ( SD ⁢ 3 ) × ( SH ⁢ 3 ) = ( SL - 1 ) × ( SW - 4 ) × ( SD ⁢ 4 ) × ( SH ⁢ 4 ) = SM ;

wherein,

• • SL and SW are the length and the width of the pillow 201 of the standard size (S) that is inserted into each of the pillow sleeves of four different widths of type S, respectively;
  • SD1, SD2, SD3, and SD4 are fill densities of the pillow 201 of the standard size (S) after assembling the pillow 201 of the standard size (S) in each of the pillow sleeves of the same length (SL-1) and different widths (SW-1), (SW-2), (SW-3), and (SW-4), respectively;
  • SH1, SH2, SH3, and SH4 are heights of the pillow 201 of the standard size (S) after assembling the pillow 201 of the standard size (S) in each of the pillow sleeves of the same length (SL-1) and different widths (SW-1), (SW-2), (SW-3), and (SW-4), respectively; and
  • SM is mass of the pillow 201 of the standard size (S).

In another example, the height of the assembled pillow 301/302/303/304 comprising a pillow 201 of the queen size (Q) inserted into each of the pillow sleeves 101, 102, 103, and 104 of the queen size length (QL-1) and of different widths QW-1, QW-2, QW-3, and QW-4 is determined by the following predefined formula:

( QL - 1 ) × ( QW - 1 ) × ( QD ⁢ 1 ) × ( QH ⁢ 1 ) = ( QL - 1 ) × ( QW - 2 ) × ( QD ⁢ 2 ) × ( QH ⁢ 2 ) = ( QL - 1 ) × ( QW - 3 ) × ( QD ⁢ 3 ) × ( QH ⁢ 3 ) = ( QL - 1 ) × ( QW - 4 ) × ( QD ⁢ 4 ) × ( QH ⁢ 4 ) = QM ;

wherein,

• • QL and QW are the length and the width of the pillow 201 of the queen size (Q) that is inserted into each of the pillow sleeves of four different widths of type Q, respectively;
  • QD1, QD2, QD3, and QD4 are fill densities of the pillow 201 of the queen size (Q) after assembling the pillow 201 of the queen size (Q) in each of the pillow sleeves of the same length (QL-1) and different widths (QW-1), (QW-2), (QW-3), and (QW-4), respectively;
  • QH1, QH2, QH3, and QH4 are heights of the pillow 201 of the queen size (Q) after assembling the pillow 201 of the queen size (Q) in each of the pillow sleeves of the same length (QL-1) and different widths (QW-1), (QW-2), (QW-3), and (QW-4), respectively; and
  • QM is mass of the pillow 201 of the queen size (Q).

In another example, the height of the assembled pillow 301/302/303/304 comprising a pillow 201 of the king size (K) inserted into each of the pillow sleeves 101, 102, 103, and 104 of the king size length (KL-1) and of different widths KW-1, KW-2, KW-3, and KW-4 is determined by the following predefined formula:

( KL - 1 ) × ( KW - 1 ) × ( KD ⁢ 1 ) × ( KH ⁢ 1 ) = ( KL - 1 ) × ( KW - 2 ) × ( KD ⁢ 2 ) × ( KH ⁢ 2 ) = ( KL - 1 ) × ( KW - 3 ) × ( KD ⁢ 3 ) × ( KH ⁢ 3 ) = ( KL - 1 ) × ( KW - 4 ) × ( KD ⁢ 4 ) × ( KH ⁢ 4 ) = KM ;

wherein,

• • KL and KW are the length and the width of the pillow 201 of the king size (K) that is inserted into each of the pillow sleeves of four different widths of type K, respectively;
  • KD1, KD2, KD3, and KD4 are fill densities of the pillow 201 of the king size (K) after assembling the pillow 201 of the king size (K) in each of the pillow sleeves of the same length (KL-1) and different widths (KW-1), (KW-2), (KW-3), and (KW-4), respectively;
  • KH1, KH2, KH3, and KH4 are heights of the pillow 201 of the king size (K) after assembling the pillow 201 of the king size (K) in each of the pillow sleeves of the same length (KL-1) and different widths (KW-1), (KW-2), (KW-3), and (KW-4), respectively; and
  • KM is mass of the pillow 201 of the king size (K).

The dimensions, for example, length, width, and height, in the above-recited formulas are measured in inches.

FIGS. 4A-4D illustrate side elevation views of four assembled pillows 301, 302, 303, and 304, respectively, comprising a pillow 201 of a single size assembled in each of four rectangular pillow sleeves 101, 102, 103, and 104 having the same length (XL-1) and four different widths XW-1, XW-2, XW-3, and XW-4 and providing four different heights XH1, XH2, XH3, and XH4, where X is one of a standard size (S), a queen size (Q), and a king size (K). As illustrated in FIGS. 4A-4D, four different heights XH1, XH2, XH3, and XH4 are provided by inserting the same pillow 201 of either a standard size, or a queen size, or a king size, into each of the four rectangular pillow sleeves 101, 102, 103, and 104 having the same length (XL-1), that is, either a standard size length (SL-1), or a queen size length (QL-1), or a king size length (KL-1), and four different widths XW-1, XW-2, XW-3, and XW-4, and closing and fastening the pillow 201 using the zipper 105.

Consider an example where a user purchases the pillow sleeve kit 100 illustrated in FIG. 1, comprising four rectangular pillow sleeves 101, 102, 103, and 104 of the same standard size length (SL-1) and four different widths SW-1, SW-2, SW-3, and SW-4, for a pillow 201 of the standard size. The terms “first”, “second”, “third”, and “fourth” are used herein for descriptive purposes only and are not to be construed to indicate or imply relative importance. When the user selects a first rectangular pillow sleeve 101 having the standard size length (SL-1) and the width (SW-1) from the pillow sleeve kit 100, inserts the pillow 201 of the standard size into the first rectangular pillow sleeve 101, and closes and fastens the pillow 201 within the interior cavity 106 of the first rectangular pillow sleeve 101 illustrated in FIG. 2, the user obtains an assembled pillow 301 with a different compression pressure (SP1), a different fill density (SD1), a different firmness, and a different height (SH1) as illustrated in FIG. 3A and FIG. 4A. Similarly, when the user selects a second rectangular pillow sleeve 102 having the same standard size length (SL-1) and the width (SW-2) from the pillow sleeve kit 100, inserts the pillow 201 of the standard size into the second rectangular pillow sleeve 102, and closes and fastens the pillow 201 within the interior cavity 106 of the second rectangular pillow sleeve 102, the user obtains an assembled pillow 302 with a different compression pressure (SP2), a different fill density (SD2), a different firmness, and a different height (SH2) as illustrated in FIG. 3B and FIG. 4B. Similarly, when the user selects a third rectangular pillow sleeve 103 having the same standard size length (SL-1) and the width (SW-3) from the pillow sleeve kit 100, inserts the pillow 201 of the standard size into the third rectangular pillow sleeve 103, and closes and fastens the pillow 201 within the interior cavity 106 of the third rectangular pillow sleeve 103, the user obtains an assembled pillow 303 with a different compression pressure (SP3), a different fill density (SD3), a different firmness, and a different height (SH3) as illustrated in FIG. 3C and FIG. 4C. Similarly, when the user selects a fourth rectangular pillow sleeve 104 having the same standard size length (SL-1) and the width (SW-4) from the pillow sleeve kit 100, inserts the pillow 201 of the standard size into the fourth rectangular pillow sleeve 104, and closes and fastens the pillow 201 within the interior cavity 106 of the fourth rectangular pillow sleeve 104, the user obtains an assembled pillow 304 with a different compression pressure (SP4), a different fill density (SD4), a different firmness, and a different height (SH4) as illustrated in FIG. 3D and FIG. 4D.

Consider another example where the user purchases the pillow sleeve kit 100 illustrated in FIG. 1, comprising four rectangular pillow sleeves 101, 102, 103, and 104 of the same queen size length (QL-1) and four different widths QW-1, QW-2, QW-3, and QW-4, for a pillow 201 of the queen size. When the user selects a first rectangular pillow sleeve 101 having the queen size length (QL-1) and the width (QW-1) from the pillow sleeve kit 100, inserts the pillow 201 of the queen size into the first rectangular pillow sleeve 101, and closes and fastens the pillow 201 within the interior cavity 106 of the first rectangular pillow sleeve 101, the user obtains an assembled pillow 301 with a different compression pressure (QP1), a different fill density (QD1), a different firmness, and a different height (QH1) as illustrated in FIG. 3A and FIG. 4A. Similarly, when the user selects a second rectangular pillow sleeve 102 having the same queen size length (QL-1) and the width (QW-2) from the pillow sleeve kit 100, inserts the pillow 201 of the queen size into the second rectangular pillow sleeve 102, and closes and fastens the pillow 201 within the interior cavity 106 of the second rectangular pillow sleeve 102, the user obtains an assembled pillow 302 with a different compression pressure (QP2), a different fill density (QD2), a different firmness, and a different height (QH2) as illustrated in FIG. 3B and FIG. 4B. Similarly, when the user selects a third rectangular pillow sleeve 103 having the same queen size length (QL-1) and the width (QW-3) from the pillow sleeve kit 100, inserts the pillow 201 of the queen size into the third rectangular pillow sleeve 103, and closes and fastens the pillow 201 within the interior cavity 106 of the third rectangular pillow sleeve 103, the user obtains an assembled pillow 303 with a different compression pressure (QP3), a different fill density (QD3), a different firmness, and a different height (QH3) as illustrated in FIG. 3C and FIG. 4C. Similarly, when the user selects a fourth rectangular pillow sleeve 104 having the same queen size length (QL-1) and the width (QW-4) from the pillow sleeve kit 100, inserts the pillow 201 of the queen size into the fourth rectangular pillow sleeve 104, and closes and fastens the pillow 201 within the interior cavity 106 of the fourth rectangular pillow sleeve 104, the user obtains an assembled pillow 304 with a different compression pressure (QP4), a different fill density (QD4), a different firmness, and a different height (QH4) as illustrated in FIG. 3D and FIG. 4D.

Consider another example where the user purchases the pillow sleeve kit 100 illustrated in FIG. 1, comprising four rectangular pillow sleeves 101, 102, 103, and 104 of the same king size length (KL-1) and four different widths KW-1, KW-2, KW-3, and KW-4, for a pillow 201 of the king size. When the user selects a first rectangular pillow sleeve 101 having the king size length (KL-1) and the width (KW-1) from the pillow sleeve kit 100, inserts the pillow 201 of the king size into the first rectangular pillow sleeve 101, and closes and fastens the pillow 201 within the interior cavity 106 of the first rectangular pillow sleeve 101, the user obtains an assembled pillow 301 with a different compression pressure (KP1), a different fill density (KD1), a different firmness, and a different height (KH1) as illustrated in FIG. 3A and FIG. 4A. Similarly, when the user selects a second rectangular pillow sleeve 102 having the same king size length (KL-1) and the width (KW-2) from the pillow sleeve kit 100, inserts the pillow 201 of the king size into the second rectangular pillow sleeve 102, and closes and fastens the pillow 201 within the interior cavity 106 of the second rectangular pillow sleeve 102, the user obtains an assembled pillow 302 with a different compression pressure (KP2), a different fill density (KD2), a different firmness, and a different height (KH2) as illustrated in FIG. 3B and FIG. 4B. Similarly, when the user selects a third rectangular pillow sleeve 103 having the same king size length (KL-1) and the width (KW-3) from the pillow sleeve kit 100, inserts the pillow 201 of the king size into the third rectangular pillow sleeve 103, and closes and fastens the pillow 201 within the interior cavity 106 of the third rectangular pillow sleeve 103, the user obtains an assembled pillow 303 with a different compression pressure (KP3), a different fill density (KD3), a different firmness, and a different height (KH3) as illustrated in FIG. 3C and FIG. 4C. Similarly, when the user selects a fourth rectangular pillow sleeve 104 having the same king size length (KL-1) and the width (KW-4) from the pillow sleeve kit 100, inserts the pillow 201 of the king size into the fourth rectangular pillow sleeve 104, and closes and fastens the pillow 201 within the interior cavity 106 of the fourth rectangular pillow sleeve 104, the user obtains an assembled pillow 304 with a different compression pressure (KP4), a different fill density (KD4), a different firmness, and a different height (KH4) as illustrated in FIG. 3D and FIG. 4D. The user may then insert the assembled pillow 301/302/303/304 into a pillowcase that matches the user's bedding or bedsheets. Each of the assembled pillows 301, 302, 303, and 304 allow a user to keep their head and neck supported at the proper height and at a desired pillow firmness for an extended time period, for example, all night long, for obtaining a refreshing and satisfying sleep with proper alignment of the user's spine.

FIGS. 5A-5B illustrate top perspective views of an embodiment of a pillow sleeve 500 with a zipper 503 in an open condition. In an embodiment, a pillow sleeve kit 100 comprises a predetermined number of pillow sleeves 500 of the type illustrated in FIG. 5A. In an embodiment, each pillow sleeve 500 is of a rectangular shape. Each pillow sleeve 500 is of the same length selectable based on the size of a pillow 201 to be inserted thereinto, and of a different width XW-1, or XW-2, or XW-3, or XW-4, configured to provide a user-selectable compression pressure, fill density, firmness, and height based on individual user comfort. The size of the pillow 201 is a standard size, or a queen size, or a king size. Accordingly, the length of the pillow sleeve 500 is a standard size length, or a queen size length, or a king size length. The pillow sleeve 500 comprises a top member 501 and a bottom member 502 attached to each other to define an interior cavity 504 illustrated in FIG. 5A, for receiving the pillow 201 illustrated in FIG. 5B. One side 501a of the top member 501 is attached to a corresponding one side 502a of the bottom member 502 by a seam. A second side 501b/502b, a third side 501c/502c, and a fourth side 501d/502d of each of the top member 501 and the bottom member 502 are attached by at least one zipper 503. In an embodiment, the zipper 503 is configured to extend continuously along the second side 501b/502b, the third side 501c/502c, and the fourth side 501d/502d of each of the top member 501 and the bottom member 502 of the pillow sleeve 500 of the single length and the different width XW-1, or XW-2, or XW-3, or XW-4. The zipper 503 comprises a pull tab 503a and a chain 503b. The chain 503b of the zipper 503 extends along the second side 501b/502b, the third side 501c/502c, and the fourth side 501d/502d of each of the top member 501 and the bottom member 502 of the pillow sleeve 500 of the single length and the different width XW-1, or XW-2, or XW-3, or XW-4. A slider (not shown) connected to the pull tab 503a of the zipper 503 is configured to traverse along the chain 503b on the second side 501b/502b, the third side 501c/502c, and the fourth side 501d/502d of each of the top member 501 and the bottom member 502 of the pillow sleeve 500 in a counterclockwise direction and a clockwise direction to open and close the pillow sleeve 500, respectively. The pull tab 503a with its slider opens or closes the chain 503b of the zipper 503 to correspondingly open or close the pillow sleeve 500.

The zipper 503 in an open condition is configured to allow insertion of the pillow 201 into the interior cavity 504 of the pillow sleeve 500 of the single length and the different width XW-1, or XW-2, or XW-3, or XW-4 to obtain an assembled pillow 505 in a closed condition as illustrated in FIG. 5C. A different compression pressure, a different fill density, a different firmness, and a different height are provided by assembling the pillow 201 in the pillow sleeve 500 of the single length and the different width XW-1, or XW-2, or XW-3, or XW-4 as disclosed in the descriptions of FIGS. 3A-3D and FIGS. 4A-4D.

FIG. 5C illustrates a top perspective view of an embodiment of an assembled pillow 505 created by inserting the pillow 201 into an interior cavity 504 of the pillow sleeve 500 shown in FIGS. 5A-5B, and fastening the zipper 503. To assemble the pillow 201 within the pillow sleeve 500, a user first opens the zipper 503 of the pillow sleeve 500 by pulling the pull tab 503a along the chain 503b, for example, in a counterclockwise direction, to expose the interior cavity 504 of the pillow sleeve 500 as illustrated in FIG. 5A. The user then disposes the pillow 201 within the interior cavity 504 on the bottom member 502 of the pillow sleeve 500 and closes the top member 501 of the pillow sleeve 500 over the pillow 201. The user then closes the zipper 503 by pulling the pull tab 503a along the chain 503b, for example, in a clockwise direction as illustrated in FIG. 5B, to obtain the assembled pillow 505 illustrated in FIG. 5C.

FIG. 6A illustrates a top perspective view of an embodiment of a pillow sleeve 600 with a zipper 503 in an open condition and flaps 604 attached along an inner boundary 603 of a bottom member 602 of the pillow sleeve 600. In an embodiment, each pillow sleeve 600 in the pillow sleeve kit is of a rectangular shape. Each pillow sleeve 600 is of the same length selectable based on the size of a pillow 201 to be inserted thereinto as illustrated in FIG. 6B, and of a different width XW-1, or XW-2, or XW-3, or XW-4, configured to provide a user-selectable compression pressure, fill density, firmness, and height based on individual user comfort. The size of the pillow 201 is a standard size, or a queen size, or a king size. Accordingly, the length of the pillow sleeve 600 is a standard size length, or a queen size length, or a king size length. The pillow sleeve 600 comprises a top member 601 and a bottom member 602 attached to each other to define an interior cavity 605 illustrated in FIG. 6A, for receiving the pillow 201 illustrated in FIG. 6B. One side 601a of the top member 601 is attached to a corresponding one side 602a of the bottom member 602 by a seam. A second side 601b/602b, a third side 601c/602c, and a fourth side 601d/602d of each of the top member 601 and the bottom member 602 are attached by at least one zipper 503. In an embodiment, the zipper 503 is configured to extend continuously along the second side 601b/602b, the third side 601c/602c, and the fourth side 601d/602d of each of the top member 601 and the bottom member 602 of the pillow sleeve 600 of the single length and the different width XW-1, or XW-2, or XW-3, or XW-4 as disclosed in the description of FIGS. 5A-5B. The chain 503b of the zipper 503 extends along the second side 601b/602b, the third side 601c/602c, and the fourth side 601d/602d of each of the top member 601 and the bottom member 602 of the pillow sleeve 600 of the single length and the different width XW-1, or XW-2, or XW-3, or XW-4. The pull tab 503a of the zipper 503 is configured to open or close the chain 503b of the zipper 503 to correspondingly open or close the pillow sleeve 600.

The zipper 503 in an open condition is configured to allow insertion of the pillow 201 into the interior cavity 605 of the pillow sleeve 600 of the single length and the different width XW-1, or XW-2, or XW-3, or XW-4 as illustrated in FIGS. 6B-6C, to obtain an assembled pillow in a closed condition. A different compression pressure, a different fill density, a different firmness, and a different height are provided by assembling the pillow 201 in the pillow sleeve 600 of the single length and the different width XW-1, or XW-2, or XW-3, or XW-4 as disclosed in the descriptions of FIGS. 3A-3D and FIGS. 4A-4D.

In an embodiment, the pillow sleeve 600 further comprises flaps 604 attached along the inner boundary 603 of the bottom member 602 of each pillow sleeve 600 of the single length and the different widths. The inner boundary 603 extends below the sides 602a, 602b, 602c, and 602d of the bottom member 602 of the pillow sleeve 600. In an embodiment, the flaps 604 are elongate members of a rectangular shape. The flaps 604 are configured to receive the four sides 201a, 201b, 201c, and 201d of the pillow 201 tucked thereunder to preclude an oversized pillow 201 from interfering with closure of the zipper 503. The flaps 604 are configured to be lifted to allow four sides 201a, 201b, 201c, and 201d of the pillow 201 to be tucked thereunder. The flaps 604 are further configured to serve as elongate pockets for accommodating the four sides 201a, 201b, 201c, and 201d of the pillow 201.

In an embodiment, the ends of each of the flaps 604 are attached to corresponding ends of an adjacent one of the flaps 604, for example, by sewing. For example, the ends 604a and 604h of the adjacent flaps 604 are sewn to each other; the ends 604b and 604c of the adjacent flaps 604 are sewn to each other; the ends 604d and 604e of the adjacent flaps 604 are sewn to each other; and the ends 604f and 604g of the adjacent flaps 604 are sewn to each other as illustrated in FIGS. 6A-6B, to form a continuous pocket at the inner boundary 603 of the bottom member 602 of the pillow sleeve 600 for receiving the four sides 201a, 201b, 201c, and 201d of the pillow 201. The inner sides 604i of the flaps 604 are left unsewn and open to allow tucking of the four sides 201a, 201b, 201c, and 201d of the pillow 201 underneath the flaps 604. In an embodiment, the flaps 604 are made of flexible materials, for example, elastic materials. In another embodiment, the flaps 604 are made of fabric materials, for example, cotton, silk, wool, polyester, etc.

FIG. 6B illustrates a top perspective view of the embodiment of the pillow sleeve 600 with the zipper 503 in the open condition and the flaps 604 shown in FIG. 6A, showing positioning of a pillow 201 for assembly thereinto. A user may lift each of the flaps 604 to tuck the four sides 201a, 201b, 201c, and 201d of the pillow 201 thereunder.

FIG. 6C illustrates a top perspective view of the embodiment of the pillow sleeve 600 with the zipper 503 in the open condition and the flaps 604 shown in FIG. 6A, showing the pillow 201 tucked under the flaps 604. To assemble the pillow 201 within the pillow sleeve 600, a user first opens the zipper 503 of the pillow sleeve 600 by pulling the pull tab 503a along the chain 503b, for example, in a counterclockwise direction, to expose the interior cavity 605 of the pillow sleeve 600 as illustrated in FIG. 6A. The user then lifts each of the flaps 604 and tucks the four sides 201a, 201b, 201c, and 201d of the pillow 201 under the flaps 604 within the interior cavity 605 on the bottom member 602 of the pillow sleeve 600 as illustrated in FIGS. 6B-6C. After the four sides 201a, 201b, 201c, and 201d of the pillow 201 are secured under their respective flaps 604 as illustrated in FIG. 6C, the user closes the top member 601 of the pillow sleeve 600 over the pillow 201 and closes the zipper 503 by pulling the pull tab 503a along the chain 503b, for example, in a clockwise direction, to obtain the assembled pillow 606 illustrated in FIG. 6D.

FIG. 6D illustrates a top perspective view of an embodiment of the assembled pillow 606 created by inserting the pillow 201 into the interior cavity 605 of the pillow sleeve 600 shown in FIGS. 6B-6C, and fastening the zipper 503.

FIG. 7A illustrates a top perspective view of an embodiment of the pillow sleeve 700 with three zippers 704, 705, and 706 in an open condition, showing positioning of a pillow 201 for assembly thereinto. The pillow sleeve 700 is of a single length selectable based on the size of the pillow 201 to be inserted thereinto, and of a different width XW-1, or XW-2, or XW-3, or XW-4, configured to provide a user-selectable compression pressure, fill density, firmness, and height based on individual user comfort. The pillow sleeve 700 comprises a top member 701 and a bottom member 702 attached to each other to define an interior cavity 703 for receiving the pillow 201. One side 701a of the top member 701 is attached to a corresponding one side 702a of the bottom member 702 by a seam. In this embodiment, a second side 701b/702b, a third side 701c/702c, and a fourth side 701d/702d of each of the top member 701 and the bottom member 702 are attached by the three zippers 704, 705, and 706, respectively. The three zippers 704, 705, and 706 are configured to extend individually along the second side 701b/702b, the third side 701c/702c, and the fourth side 701d/702d of each of the top member 701 and the bottom member 702 of the pillow sleeve 700 of the single length and the different width XW-1, or XW-2, or XW-3, or XW-4. The chain 704b of the zipper 704 extends along the second side 701b/702b; the chain 705b of the zipper 705 extends along the third side 701c/702c; and the chain 706b of the zipper 706 extends along the fourth side 701d/702d, of each of the top member 701 and the bottom member 702 of the pillow sleeve 700. The pull tabs 704a, 705a, and 706a of the zippers 704, 705, and 706, respectively, are configured to open or close the chains 704b, 705b, and 706b of the zippers 704, 705, and 706, respectively, to correspondingly open or close the pillow sleeve 700. The zippers 704, 705, and 706 comprise retainer boxes 704c, 705c, and 706c, respectively, configured to receive insert pins disposed on the chains 704b, 705b, and 706b of the top member 701 to fasten the top member 701 to the bottom member 702 and close the pillow sleeve 700. For example, the zipper 704 comprises a retainer box 704c configured to receive an insert pin 704d disposed on the chain 704b of the top member 701 as illustrated in FIG. 7A to fasten the second side 701b of the top member 701 to the second side 702b of the bottom member 702. Similarly, the third side 701c of the top member 701 is fastened to the third side 702c of the bottom member 702, and the fourth side 701d of the top member 701 is fastened to the fourth side 702d of the bottom member 702.

The zippers 704, 705, and 706 in an open condition allow insertion of the pillow 201 into the interior cavity 703 of the pillow sleeve 700 of the single length and the different width XW-1, or XW-2, or XW-3, or XW-4 as illustrated in FIG. 7A, to obtain an assembled pillow 708 in a closed condition as illustrated in FIG. 7B. A different compression pressure, a different fill density, a different firmness, and a different height are provided by assembling the pillow 201 in the pillow sleeve 700 of the single length and the different width XW-1, or XW-2, or XW-3, or XW-4 as disclosed in the descriptions of FIGS. 3A-3D and FIGS. 4A-4D.

FIG. 7B illustrates a top perspective view of an embodiment of an assembled pillow 708 created by inserting the pillow 201 into an interior cavity 703 of the pillow sleeve 700 shown in FIG. 7A, and fastening the three zippers 704, 705, and 706. To assemble the pillow 201 within the pillow sleeve 700, a user first opens the zippers 704, 705, and 706 of the pillow sleeve 700 to expose the interior cavity 703 of the pillow sleeve 700 as illustrated in FIG. 7A. The user then inserts the pillow 201 into the interior cavity 703 on the bottom member 702 of the pillow sleeve 700. The user then closes the top member 701 of the pillow sleeve 700 over the pillow 201 and closes the zippers 704, 705, and 706, for example, by first pulling the pull tab 704a of the zipper 704 along the chain 704b in the direction of the arrow 707a illustrated in FIG. 7A; then pulling the pull tab 706a of the zipper 706 along the chain 706b in the direction of the arrow 707b illustrated in FIG. 7A; and then pulling the pull tab 705a of the zipper 705 along the chain 705b in the direction of the arrow 707c illustrated in FIG. 7A, to obtain the assembled pillow 708 illustrated in FIG. 7B. In the closed condition, the zippers 704 and 705 meet at a corner stop element 704e as illustrated in FIG. 7B.

FIG. 8A illustrates a flowchart of an embodiment of a method for obtaining a user-selectable compression pressure, fill density, firmness, and height in a pillow 201 shown in FIG. 2, based on individual user comfort. In the method disclosed herein, a pillow sleeve kit 100 comprising a predetermined number of pillow sleeves 101, 102, 103, and 104 of a single length selectable based on a size of the pillow 201 to be inserted thereinto, where the pillow sleeves 101, 102, 103, and 104 are of different widths configured to provide a user-selectable compression pressure, fill density, firmness, and height based on individual user comfort as illustrated in FIGS. 1-2 and as disclosed in the detailed descriptions of FIGS. 1-2, FIGS. 3A-3D, and FIGS. 4A-4D, is provided 801. At least one zipper 105 extending along one or more sides of each of the top member 101a/102a/103a/104a and the bottom member 101b/102b/103b/104b of each of the pillow sleeves 101, 102, 103, and 104 of the single length and the different widths as illustrated in FIGS. 3A-3D, is also provided 802. For example, one zipper 105 is configured to extend along the fourth side 101f/102f/103f/104f of each of the top member 101a/102a/103a/104a and the bottom member 101b/102b/103b/104b of each of the pillow sleeves 101, 102, 103, and 104 as illustrated in FIG. 1, FIGS. 3A-3D, and FIGS. 4A-4D. In another example, one zipper 503 is configured to extend along the second side 501b and 502b, the third side 501c and 502c, and the fourth side 501d and 502d of the top member 501 and the bottom member 502 of each of the pillow sleeves 500 as illustrated in FIGS. 5A-5C. In another example, three zippers 704, 705, and 706 are configured to extend individually along the second side 701b/702b, the third side 701c/702c, and the fourth side 701d/702d of each of the top member 701 and the bottom member 702 of each pillow sleeve 700 as illustrated in FIGS. 7A-7B. To obtain an assembled pillow 301/302/303/304 as illustrated in FIGS. 3A-3D, with a different compression pressure, a different fill density, a different firmness, and a different height, a user opens 803a the zipper 105 and assembles the pillow 201 in the interior cavity 106 of each of the pillow sleeves 101, 102, 103, and 104 of the single length and the different widths. Assembling the pillow 201 comprises inserting 803a the pillow 201 into the interior cavity 106 of each of the pillow sleeves 101, 102, 103, and 104 of the single length and the different widths, and closing and fastening 803a the pillow 201 therewithin using the zipper 105. For example, the user selects any one of the pillow sleeves from the pillow sleeve kit 100, for example, the pillow sleeve 101 having the same length as the other pillow sleeves 102, 103, and 104, but a different width XW-1, and assembles the pillow 201 within the selected pillow sleeve 101 to obtain a desired compression pressure, fill density, firmness, and height. If the user desires a different compression pressure, fill density, firmness, and height, the user selects another one of the pillow sleeves from the pillow sleeve kit 100, for example, the pillow sleeve 102 or 103 or 104 having the same length as the first pillow sleeve 101, but a different width XW-2 or XW-3 or XW-4, respectively, and assembles the pillow 201 within the selected pillow sleeve 102 or 103 or 104 to obtain a different compression pressure, fill density, firmness, and height. The length, width, fill density, height, and mass of the assembled pillow 301/302/303/304 are related 804 by a predefined formula as follows:

( XL - 1 ) × ( XW - 1 ) × ( XD ⁢ 1 ) × ( XH ⁢ 1 ) = ( XL - 1 ) × ( XW - 2 ) × ( XD ⁢ 2 ) × ( XH ⁢ 2 ) = ( XL - 1 ) × ( XW - 3 ) × ( XD ⁢ 3 ) × ( XH ⁢ 3 ) = ( XL - 1 ) × ( XW - 4 ) × ( XD ⁢ 4 ) × ( XH ⁢ 4 ) = … = ( XL - 1 ) × ( XW - N ) × ( XDN ) × ( XHN ) = XM ;

wherein,

• • XL and XW are the length and the width of the pillow 201 of size X that is inserted into each of the pillow sleeves of “N” different widths of type X, respectively;
  • XD1, XD2, XD3, XD4, . . . , XDN are fill densities of the pillow 201 of size X after assembling the pillow 201 of size X in each of the pillow sleeves of length (XL-1) and widths (XW-1), (XW-2), (XW-3), (XW-4), . . . , (XW-N), respectively;
  • XH1, XH2, XH3, XH4, . . . , XHN are heights of the pillow 201 of size X after assembling the pillow 201 of size X in each of the pillow sleeves of length (XL-1) and widths (XW-1), (XW-2), (XW-3), (XW-4), . . . , (XW-N), respectively;
  • XM is mass of the pillow 201 of size X; and
  • X is one of a standard size (S), a queen size (Q), and a king size (K) of the pillow 201.

FIG. 8B illustrates a flowchart of another embodiment of a method for obtaining a user-selectable compression pressure, fill density, firmness, and height in a pillow 201 shown in FIGS. 6B-6C, based on individual user comfort. In the method disclosed herein, a pillow sleeve kit 100 comprising a predetermined number of pillow sleeves 600 of a single length selectable based on a size of the pillow 201 to be inserted thereinto, and of different widths, configured to provide a user-selectable compression pressure, fill density, firmness, and height based on individual user comfort is provided 801. At least one zipper 503 extending along one or more sides of each of the top member 601 and the bottom member 602 of each of the pillow sleeves 600 of the single length and the different widths illustrated in FIGS. 6A-6D, is also provided 802. For example, one zipper 503 is configured to extend along the second side 601b and 602b, the third side 601c and 602c, and the fourth side 601d and 602d of the top member 601 and the bottom member 602 of each of the pillow sleeves 600 as illustrated in FIGS. 6A-6D. To obtain an assembled pillow 606 with a different compression pressure, a different fill density, a different firmness, and a different height, a user opens 803b the zipper 503 and assembles the pillow 201 in the interior cavity 605 of each of the pillow sleeves 600 of the single length and the different widths. Assembling the pillow 201 comprises tucking 803b the sides 201a, 201b, 201c, and 201d of the pillow 201 under the flaps 604 attached along the inner boundary 603 of the bottom member 602 of each of the pillow sleeves 600 as illustrated in FIGS. 6B-6C, and closing and fastening 803b the pillow 201 therewithin using the zipper 503. The length, width, fill density, height, and mass of the assembled pillow 606 are related 804 by a predefined formula as follows:

( XL - 1 ) × ( XW - 1 ) × ( XD ⁢ 1 ) × ( XH ⁢ 1 ) = ( XL - 1 ) × ( XW - 2 ) × ( XD ⁢ 2 ) × ( XH ⁢ 2 ) = ( XL - 1 ) × ( XW - 3 ) × ( XD ⁢ 3 ) × ( XH ⁢ 3 ) = ( XL - 1 ) × ( XW - 4 ) × ( XD ⁢ 4 ) × ( XH ⁢ 4 ) = … = ( XL - 1 ) × ( XW - N ) × ( XDN ) × ( XHN ) = XM ;

wherein,

• • XL and XW are the length and the width of the pillow 201 of size X that is inserted into each of the pillow sleeves of “N” different widths of type X, respectively;
  • XD1, XD2, XD3, XD4, . . . , XDN are fill densities of the pillow 201 of size X after assembling the pillow 201 of size X in each of the pillow sleeves of length (XL-1) and widths (XW-1), (XW-2), (XW-3), (XW-4), . . . , (XW-N), respectively;
  • XH1, XH2, XH3, XH4, . . . , XHN are heights of the pillow 201 of size X after assembling the pillow 201 of size X in each of the pillow sleeves of length (XL-1) and widths (XW-1), (XW-2), (XW-3), (XW-4), . . . , (XW-N), respectively;
  • XM is mass of the pillow 201 of size X; and
  • X is one of a standard size (S), a queen size (Q), and a king size (K) of the pillow 201.

The pillow sleeves 101, 102, 103, 104, 500, 600, and 700 disclosed herein are configured to use compression to adjust the firmness and height of a pillow 201. The pillow sleeves 101, 102, 103, 104, 500, 600, and 700 allow users to obtain a customized fit by merely changing the amount of compression they apply to the fill material contained in their pillow 201 based on the width of the pillow sleeve 101/102/103/104/500/600/700. To increase the height or firmness of the pillow 201, the pillow 201 is inserted within a pillow sleeve of a narrower width. Therefore, to obtain a higher and firmer pillow, users merely need to use a tighter fitting pillow sleeve under their normal pillow case. The pillow sleeve kit 100 provides a set of pillow sleeves 101, 102, 103, and 104 of the same length and different widths to preclude the users from having to change their pillows, and allows users to merely replace the pillow sleeve of one width with a pillow sleeve of a different width from the pillow sleeve kit 100.

The pillow sleeves 101, 102, 103, 104, 500, 600, and 700 disclosed herein are configured with different widths that compress the fill material of the pillow 201 and increase the fill density in the pillow 201 within the pillow sleeves 101, 102, 103, 104, 500, 600, and 700 illustrated in FIGS. 1-2, FIGS. 3A-3D, FIGS. 5A-5C, and FIGS. 6A-6D, thereby providing the desired firmness and height of the pillow 201 and precluding the pillow 201 from flattening out during use. The pillow sleeve kit 100 disclosed herein precludes frequent replacement of a user's pillow 201 and allows the user to merely change the pillow sleeves 101, 102, 103, 104, 500, 600, and 700 to change the firmness of the pillow 201 and obtain the required pillow compression pressure, fill density, firmness, height, and comfort. The different widths of the pillow sleeves 101, 102, 103, and 104 in the pillow sleeve kit 100 facilitate the compression of the fill material of the pillow 201, thereby allowing the pillow sleeves 101, 102, 103, and 104 to optimally control the compression and therefore, the height of the assembled pillow 301/302/303/304 illustrated in FIGS. 3A-3D. Different compression pressures, fill densities, and heights of the pillow 201 are provided by inserting the same size pillow 201 into the pillow sleeves 101, 102, 103, and 104 with different widths to alter filling compression and fill density, thereby altering the height and firmness of the pillow 201. The compression pressure, fill density, firmness, and height provided by each of the pillow sleeves 101, 102, 103, 104, 500, and 600 precludes the user from having to continually fluff up their pillows 201 and reposition them all night long. The different compression pressures provided by the pillow sleeves 101, 102, 103, and 104 with different widths allows easy and convenient individual adjustment of the height and firmness of the pillow 201. The pillow sleeve kit 100 allows the user to select the pillow sleeve with the required width that creates a level of compression pressure, fill density, firmness, and height of the pillow 201 that provides the user with optimal individual pillow firmness and comfort. Furthermore, the flaps 604 provided in each of the pillow sleeves 600 illustrated in FIGS. 6A-6C, allows convenient accommodation of the pillow 201 within each of the pillow sleeves 600 while precluding the pillow 201 from interfering with closure of the zipper 503 of each pillow sleeve 600.

The foregoing examples and illustrative implementations of various embodiments have been provided merely for explanation and are in no way to be construed as limiting the embodiments disclosed herein. Dimensions of the pillow and the pillow sleeves disclosed above are exemplary, and are not limiting of the scope of the embodiments herein. While the embodiments have been described with reference to various illustrative implementations, drawings, and techniques, it is understood that the words, which have been used herein, are words of description and illustration, rather than words of limitation. Furthermore, although the embodiments have been described herein with reference to particular means, materials, techniques, and implementations, the embodiments herein are not intended to be limited to the particulars disclosed herein; rather, the embodiments extend to all functionally equivalent structures, methods and uses, such as are within the scope of the appended claims. It will be understood by those skilled in the art, having the benefit of the teachings of this specification, that the embodiments disclosed herein are capable of modifications and other embodiments may be effected and changes may be made thereto, without departing from the scope and spirit of the embodiments disclosed herein.