Antifracture scores for easy open container walls

Details Antifracture scores for easy open container walls Antifracture scores for easy open container walls

1997-12-15

1999-08-17

Coan, James F.

Sheet metal container making

Method

Forming or treating metallic closure

413 17, 413 67, B21D 5144

Patent

active

059383909

ABSTRACT:
An improved method and apparatus for scoring a metallic container wall, which facilitates scoring thin gauge, hard temper metal such as coated or uncoated aluminum to reduced score residuals wherein the scoring tool has a secondary antifracture score indenter on one or both sides of a primary indenter and in which the outboard secondary indenter has an outboard face angled about 30 to 40 degrees to vertical.

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