Closure with smooth edge

Details Closure with smooth edge Closure with smooth edge

1980-11-28

1983-01-25

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

Spherical tool

72126, 72299, 29 90R, B21C 3730, B24B 3900

Patent

active

043696430

ABSTRACT:
A metal cap or closure having a smooth, rounded edge. The smooth, rounded edge is formed by contacting the rough edge of the cap or closure with a plurality of moving metal spheres. The apparatus for forming the smooth, rounded edge includes a plate in which the spheres are rotatably mounted and a holder for holding the closure over the spheres so that the edge of the closure contacts the rotating spheres.

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patent: 3538874 (1970-11-01), Sawert
patent: 3866452 (1975-02-01), Neilsen
patent: 4011962 (1977-03-01), Favell

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