US PATENT SUBCLASS 72 / 333
.~.~ With endless cutting edges (e.g., for punching a hole)

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.~.~ With endless cutting edges (e.g., for punching a hole) {2}
334  DF  .~.~.~> After final metal-deforming operation
335  DF  .~.~.~> Pre-cutting (i.e., before metal-deforming) {1}

DEFINITION

Classification: 72/333

With endless cutting edges (e.g., for punching a hole):

(under subclass 332) Subject matter wherein the shearing edge on each of said elements defines a closed curve in a plane normal to the direction of motion of the movable element(s).

(1) Note. See (1) Note under subclass 327.