Method for making container closures

Details Method for making container closures Method for making container closures

1975-05-05

1977-02-08

Lanham, C.W.

113 15A, B21D 5140

Patent

active

040067009

ABSTRACT:
The present method of creating a tear line in metal, of particular advantage when such a weakening line is to be uniformly reproduced in tougher sheet metal, involves combining the initial steps of (a) bending the largely unrestrained sheet material to form the closure periphery with tension inherent therein, and (b) concurrently coining longitudinally that portion of the periphery which is in tension thus to induce exactly to the required degree the fracture at the desired weakening line. Final steps of swaging and coating with sealant may then follow as hitherto taught to provide lids with easy-open closures capable of retaining fluid pressure.

REFERENCES:
patent: 3583348 (1971-06-01), Brown
patent: 3760752 (1973-09-01), Geiger
patent: 3870001 (1975-03-01), Brown
patent: 3871314 (1975-03-01), Stargell
patent: 3888199 (1975-06-01), Herrmann
patent: 3918378 (1975-11-01), Clawson
patent: 3938455 (1976-02-01), Urmston
patent: 3946683 (1976-03-01), Jordan

Affiliated with

Also associated with

Rating

Method for making container closures does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for making container closures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for making container closures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1208580