Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1984-08-31
1986-06-17
Lawrence, Evan K.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156 85, 156164, 156209, 156324, B32B 520, B32B 3122, B32B 3126
Patent
active
045954364
ABSTRACT:
A method and apparatus for making a foamed polyurethane cushion. The cushion may be a separate cushion for carpeting or other fabric, or may be bonded to carpeting. Components for forming a foamed polyurethane are cooled, and dispensed into a puddle on a moving sheet. The puddle is leveled by an air knife into a uniform coating; then, the moving sheet is passed around a roller and placed coated side down against a fabric. The resulting sandwich is held, and moved across a steam box. The steam causes the components to react and form a blown polyurethane. After the blowing is complete and before the foam is cured beyond its plastic state, the thickness of the foam is adjusted by pressing with a roller. The sheet, which is a thermoplastic, is heated to cause the sheet to blend into the completed foam.
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Hamrick Glen F.
Sosebee B. Lamar
Walker Paul
Hamrick Glen F.
Lawrence Evan K.
Middleton James B.
Walker Paul
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