Expanded foam products and methods for producing the same

Details Expanded foam products and methods for producing the same Expanded foam products and methods for producing the same

1995-01-05

1998-01-06

McCamish, Marion E.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

428136, 428138, 428158, 428159, 4283044, B32B 310, B32B 330

Patent

active

057052522

ABSTRACT:
An expanded resilient product and methods for making the same are disclosed. The product is characterized as a geometric solid of resilient material that has a plurality of slits formed therein. Each slit is defined by a first surface having a protruding portion and second surface having a recess portion corresponding to the protruding portion of the first surface which together form an interlocking fit between the two. Forces are applied to the product sufficient to dislodge a protruding portion of the first surface from the complementary recess portion of the second surface, thereby forming a plurality of gaps. The product is then permitted to relax, whereupon the protruding portions compressively contact the complementary recess portions of the second surface. But because of the interlocking fit, the protruding portions are prevented from re-engaging the recess portions and thereby maintain the expanded nature of the product. A method for manufacturing the product involves the creation of the slits and subsequent physical expansion of the resilient product to produce the self-sustaining gaps or apertures.

REFERENCES:
patent: 2588823 (1952-03-01), Glassman
patent: 3655501 (1972-04-01), Tesch
patent: 3775526 (1973-11-01), Gilmore
patent: 3987507 (1976-10-01), Hall
patent: 4194255 (1980-03-01), Poppe
patent: 4306675 (1981-12-01), Swanson
patent: 4879776 (1989-11-01), Farley
patent: 4957791 (1990-09-01), Richter
patent: 5007124 (1991-04-01), Raburn et al.
patent: 5082708 (1992-01-01), Kauffman et al.
Cascade Designs' 1995 Product Catalog, pp. 13-14.

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