US PATENT SUBCLASS 72 / 327
.~.~.~ With endless cutting edges

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

324  DF  WITH CUTTING {5}
325  DF  .~ By composite tool (e.g., piercing) {1}
326  DF  .~.~ Shear-type {3}
327.~.~.~ With endless cutting edges {2}
328  DF  .~.~.~.~> Utilizing stripper or ejector
329  DF  .~.~.~.~> Blank detaching

DEFINITION

Classification: 72/327

With endless cutting edges:

(under subclass 326) 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. The cutting effected by an endless edge shearing couple is variously termed "punching", "die-cutting", "blanking", "stamping out", etc. In all cases, a discrete piece of material is detached (e.g., a blank, product, or waste) by a cut which encircles the detached piece, as indicated in the accompanying diagram. [figure] [caption]Deforming work and severing product by endless-edge composite tool (subclass 327)

SEE OR SEARCH THIS CLASS, SUBCLASS:

333+, for an endless edge shearing tool couple combined with a metal-deforming device, or for the corresponding method.