Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1981-09-08
1982-09-07
Van Balen, William J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
156 79, 428124, 428160, 428172, B32B 304, B32B 312, B32B 326
Patent
active
043484484
ABSTRACT:
The present invention is directed not only to a method for processing composite sheet material comprising a substrate to one flat surface of which a facing has been laminated but also to the resulting article of manufacture. The process permits the facing material to be shaped to a predetermined, curvilinear configuration. This result may be accomplished by incising a groove in that surface of the substrate opposite the surface thereof to which the facing is laminated so as to provide a freeform span of the facing. Adhesive is applied to selected portions of the substrate, and a predetermined charge of foam forming reactants are deposited along the groove. Thereupon the freeform span is bent to the desired configuration and, if required, so maintained while the foam forms and the adhesive sets.
REFERENCES:
patent: 3731449 (1973-05-01), Kephart, Jr.
patent: 3869106 (1975-03-01), Gregov
patent: 3935049 (1976-01-01), Schmidt et al.
patent: 3969868 (1976-07-01), Bainter et al.
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