Product and method of making bellows

Details Product and method of making bellows Product and method of making bellows

1980-04-28

1982-06-29

Hershkovitz, Abraham

Expansible chamber devices

Bellows type expansible chamber

With stop means to limit axial movement of bellows

92 46, 92 47, 92 92, F01B 1900

Patent

active

043367470

ABSTRACT:
A product and method of making a bellows from thermoplastic sheet material including forming a plurality of substantially U-shaped gussets having inside and outside edges, heat-sealing the inside edges of the gussets in pairs, heat-sealing the outside edges of adjacent pairs in an accordion-like stack, and then heat-sealing the stack of sealed gussets between a folded cover member of thermoplastic sheet material having an air passage through the cover member for communication with an expansible air chamber formed by the cover member and the gussets.

REFERENCES:
patent: 3090403 (1963-05-01), Kroekel
patent: 3224344 (1965-12-01), Baumann
patent: 3482302 (1969-12-01), Williams
patent: 3495502 (1970-02-01), Bousso
patent: 3845783 (1974-11-01), De Lepeleire
patent: 3861277 (1975-01-01), Wagner

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