Inflatable cushion and method of making the same

Details Inflatable cushion and method of making the same Inflatable cushion and method of making the same

1975-10-31

1977-11-08

Van Balen, William J.

Beds

Bedsteads

Element or detail

5350, 156290, 156583, 428 35, 428166, 428178, 428192, 428198, 428332, A47C 454, B32B 3104

Patent

active

040568580

ABSTRACT:
An inflatable cushion formed of marginally bonded superimposed flexible thermoplastic sheet material characterized by a plurality of substantially uniformly spaced thermally bonded areas each of a thickness less than the combined thickness of the component sheet material and characterized by a plurality of integral closely spaced ribs projecting from one surface, and by a marginal integral portion of greater thickness than the combined thicknesses of the component sheet material. The bonded areas are formed by a method wherein superimposed sheets are pressed to a predetermined extent between a supporting surface and a die heated to a temperature above the melting point of the thermopolastic sheet material and characterized by a plurality of closely spaced ribs substantially uniformly engaging said sheet material while bearing on said supporting surface.

REFERENCES:
patent: 2522079 (1950-09-01), Winstead
patent: 2936816 (1960-05-01), Lang

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