US PATENT SUBCLASS 413 / 23
.~.~ Forming thread

Current as of: June, 1999
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413 /   HD   SHEET METAL CONTAINER MAKING

1  DF  METHOD {3}
8  DF  .~ Forming or treating metallic closure {9}
23.~.~ Forming thread

DEFINITION

Classification: 413/23

Forming thread:

(under subclass 8) Process wherein a helical screw is formed on a skirt portion of a metallic end closure.