Method and apparatus for scoring metal panels and resultant prod

Details Method and apparatus for scoring metal panels and resultant prod Method and apparatus for scoring metal panels and resultant prod

1993-02-05

1994-12-20

Crane, Daniel C.

Metal deforming

Process

With attenuation, thickening, elongating or shortening of...

72412, 413 12, 413 55, B21D 2810

Patent

active

053737210

ABSTRACT:
A method of scoring a metal panel such as a can end lid includes forming a first scoreline having a base and a pair of lateral walls and subsequently forming a second scoreline within the first scoreline by indenting a portion of the first scoreline base. The final scoreline may be created by employing two or more scoring operations after the first scoreline has been formed. The apparatus preferably includes a press which supports the first scoring die and second scoring die in such a manner as to establish the desired sequence of scoring operations. This method and associated apparatus provide a scored metal panel or container lid having improved performance characteristics. The resultant lid is characterized by reduced residual strain.

REFERENCES:
patent: 2760263 (1956-08-01), Geertsen
patent: 3563199 (1971-02-01), Wolfe
patent: 3815534 (1974-06-01), Kneusel
patent: 3820681 (1974-06-01), Hulse
patent: 4122791 (1978-10-01), Brown
patent: 4348464 (1982-09-01), Khourt

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