ClassID:

126516

D21F1/022 - CPC Classification

Classification description:

Wet end of machines for making continuous webs of paper; Head boxes of Fourdrinier machines Means for injecting material into flow within the headbox

Recent Application in this class:
#1
20250250740
2025-08-07

ZONED AND/OR LAYERED SUBSTRATES AND METHOD AND APPARATUS FOR PRODUCING THE SAME

#2
20240426054
2024-12-26

SHEET MANUFACTURING APPARATUS

#3
20240368838
2024-11-07

PAPERMAKING MACHINE THAT UTILIZES ONLY A STRUCTURED FABRIC IN THE FORMING OF PAPER

#4
20240125048
2024-04-18

Method and apparatus for producing a zoned substrate

#5
20230149226
2023-05-18

Method and apparatus for producing a zoned and/or layered substrate

#6
20230131582
2023-04-27

Zoned and/or layered substrates and method and apparatus for producing the same

#7
20210301473
2021-09-30

Use of a polymer product for deposit formation control in manufacture of paper or board

#8
20210230802
2021-07-29

EQUIPMENT FOR MANUFACTURING FIBER STRUCTURE, METHOD FOR MANUFACTURING FIBER STRUCTURE, AND FIBER STRUCTURE

#9
20210189650
2021-06-24

Method of and an arrangement for adding at least one additional stock component to an approach flow system of a fiber web machine

#10
20180361702
2018-12-20

Multilayer facer manufacturing system

#11
20180087217
2018-03-29

DECKLE BOARD SYSTEM SUPPORT ASSEMBLY, CONTROL ASSEMBLY, AND/OR ACTUATION ASSEMBLY

#12
20120273150
2012-11-01

DISTRIBUTION CHANNELING IN CONNECTION WITH THE HEADBOX OF A PAPER MACHINE

#13
20120247704
2012-10-04

FEEDER CHANNEL FOR DILUTING FLUID

#14
20120168105
2012-07-05

HEADBOX FOR A MACHINE FOR PRODUCING A FIBROUS WEB

#15
20110303381
2011-12-15

Headbox for a machine for producing a fibrous web

#16
20110290441
2011-12-01

Headbox for a machine for producing a fibrous web

#17
20110290440
2011-12-01

Headbox for a machine for producing a fibrous web

#18
20110265968
2011-11-03

Headbox for a machine for producing a fibrous web

#19
20100122786
2010-05-20

APPLICATION OF RETENTION, DRAINAGE, AND FORMATION (RDF) CHEMICAL AIDS AFTER A HEADBOX OF A PAPERMAKING PROCESS

#20
20080023167
2008-01-31

Deflection compensation roll

#21
20070267164
2007-11-22

Headbox and stock delivery system for a papermaking machine

#22
20050242313
2005-11-03

Apparatus for controlling medium flow