49139 ⎘
Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles; Auxiliary operations; Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length by gravity, e.g. casting onto, or between, moving surfaces the material being spread in the nip of two cooperating rollers