Method of making closure device for cans and other containers

Details Method of making closure device for cans and other containers Method of making closure device for cans and other containers

1974-03-25

1976-05-18

Kucia, Richard R.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Plural sequential shaping or molding steps on same workpiece

264318, 264328, 264334, B29F 114

Patent

active

039579441

ABSTRACT:
A method of making a closure device for a can or other container is disclosed wherein the device has a tubular element of flexible plastics material attachable to a container wall and an upper portion which can be folded inwardly inside a lower portion in the manner of a bellows to retract the tubular element which is closed by a removable lid having external handles by which the lid and the tubular element can be pulled out, the lid being removable by rupture of a weakened bridge portion and being re-usable for re-closing the container. The closure device is molded in one piece and then folded into its retracted condition automatically upon withdrawal of the mold core, so that no additional manufacturing steps are necessary.

REFERENCES:
patent: 2330762 (1943-09-01), Tooker
patent: 3283047 (1966-11-01), Savary
patent: 3325576 (1967-06-01), Kessler
patent: 3570107 (1971-03-01), Matt

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