Surface shaping of compressible cellular polymers with...

Details Surface shaping of compressible cellular polymers with... Surface shaping of compressible cellular polymers with...

2011-06-07

2011-06-07

Huson, Monica A (Department: 1742)

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Reshaping running or indefinite-length work

C264S046300, C264S280000, C264S160000, C425S299000, C425S331000, C425S362000, C005S690000

Reexamination Certificate

active

07955544

ABSTRACT:
Apparatus and methods for cutting compressible cellular polymers such as polyurethane foam, are characterized by a first die roller and a pressure roller, wherein both rollers define raised portions separated by recesses or depressions, and the raised portions on the first die roller register with the recesses of the pressure roller at a nip formed between the rollers. Portions of the polymer material extruded into the spaces between the raised portions of the first die roller are cut away, such that the cut product conforms substantially to the surface geometry of the first die roller, and the depth of cut is greater than with prior rotary cutting methods.

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