1976-04-05
1977-06-21
Keenan, Michael J.
B21D 5144
Patent
active
040304337
ABSTRACT:
A multiple stage punching and stamping process for the purpose of forming a tightly sealed integral closure in a can lid without use of additional material, and concurrently forming retaining and guiding grooves which allow the closure to be displaced laterally to provide an opening in the can.
REFERENCES:
patent: 3266452 (1966-08-01), Taylor
patent: 3363798 (1968-01-01), Garangiotis
patent: 3760752 (1973-09-01), Geiger
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