Sealing devices

Details Sealing devices Sealing devices

1974-08-29

1977-02-22

Wolfe, Robert L.

Closure fasteners

Seals

Encasing

70 68, B65D 5506

Patent

active

040089142

ABSTRACT:
A sealing device for reusable envelopes in which a zip is held closed by a breakable plastic seal, the disposable, breakable part of the seal being broken by rotation of a coin in a slot provided.

REFERENCES:
patent: 95204 (1869-09-01), Dewe
patent: 119333 (1871-09-01), Dunn
patent: 206238 (1878-07-01), Hopkins
patent: 555412 (1896-02-01), Tyson
patent: 779032 (1905-01-01), Draudt
patent: 1030458 (1912-06-01), Brooks
patent: 2411115 (1946-11-01), Rifkin
patent: 2942450 (1960-06-01), Krug
patent: 3138842 (1964-06-01), Arthur
patent: 3955842 (1976-05-01), Edwards

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