US PATENT SUBCLASS 72 / 335
.~.~.~ Pre-cutting (i.e., before metal-deforming)

Current as of: June, 1999
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72 /   HD   METAL DEFORMING

324  DF  WITH CUTTING {5}
332  DF  .~ By shearing tool-couple {2}
333  DF  .~.~ With endless cutting edges (e.g., for punching a hole) {2}
335.~.~.~ Pre-cutting (i.e., before metal-deforming) {1}
336  DF  .~.~.~.~> Blank detaching

DEFINITION

Classification: 72/335

Precutting (i.e., before metal deforming):

(under subclass 333) Subject matter wherein the cutting operation precedes any metal-deforming operation (a) in a sequence of method steps, or (b) in the disclosed operation of a machine.

(1) Note. This subclass is intended to accommodate any cutting by a tool of the type proper to subclass 333 which occurs (a) prior to the initial metal-deforming treatment on a workpiece, (b) prior to any deforming operation in the same operating cycle of a machine, or (c) "upstream" of metal-deforming tool stations in a progressive punch press or the like.

(2) Note. The cutting which characterizes this subclass is usually for the purpose of punching out slugs of waste material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

324, for machining (drilling, grinding, etc.), prior to metal deformation.

339, for precutting other than by disclosed shearing with severance of a discrete piece.