Hot water bag

Details Hot water bag Hot water bag

1978-02-23

1979-07-03

Norton, Donald F.

Purses, wallets, and protective covers

Protective cover made of flaccid material

For a racquet

128403, 150 8, A61F 704

Patent

active

041597281

ABSTRACT:
A hot water bag made of a soft, flexible, rubber-like synthetic material and defining two side walls of a substantially rectangular shape and having a filling neck at a shorter side thereof, comprising a soft flexible coat seam-welded to at least one of said side walls. The hot water bag is manufactured by injection die molding process in assembled outer molds including a core; the bag body with embedded filling neck is first manufactured with a side slit for removing the die core then the pliant coat is seam welded to one side and finally the slit between the side walls is closed by welding.

REFERENCES:
patent: 1857087 (1932-05-01), Lindemann
patent: 2043327 (1936-06-01), Miller
patent: 2136043 (1938-11-01), De Laney
patent: 3610307 (1971-10-01), Huff
patent: 3906129 (1975-09-01), Damois

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