Closure unit made of sheet metal or plating, method of manufactu

Details Closure unit made of sheet metal or plating, method of manufactu Closure unit made of sheet metal or plating, method of manufactu

1988-12-05

1990-04-10

Marcus, Stephen

Receptacles

Closures

Removable closure retained by adhesive or fusion means

220265, 2291231, B65D 4100

Patent

active

049152548

ABSTRACT:
The closure unit can be manufactured in a single deep-drawing operation. During the course of a predetermined stroke of the single deep-drawing operation, such as the downward stroke up to a lower dead-center position, a blank is punched out, a ring or marginal rim and a collar are formed, a central opening is punched out and a section extending peripherally to the cut edge is downwardly extended. During the upward stroke predetermined sections of the extended collar are rolled and subsequently squeezed together.

REFERENCES:
patent: 2063550 (1936-12-01), Hodgson
patent: 3547305 (1970-12-01), Khoury
patent: 4253584 (1981-03-01), Bloeck et al.
patent: 4328905 (1982-05-01), Hardt
patent: 4540105 (1985-09-01), Wright
patent: 4544080 (1985-10-01), Wright et al.
patent: 4557398 (1985-12-01), Hambleton et al.
patent: 4637543 (1987-01-01), Kucherer

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