US PATENT SUBCLASS 72 / 355.4
.~.~.~.~.~ Passing through work; e.g., punch

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

343  DF  BY USE OF CLOSED-DIE AND COACTING WORK-FORCER (E.G., PUSH-DRAWING) {3}
352  DF  .~ Forcing work into or within closed die; e.g., forging {6}
353.2  DF  .~.~ By two or more coacting tools movable relative to closed die; e.g., tool complex {3}
354.6  DF  .~.~.~ One tool telescoping into closed die {2}
355.2  DF  .~.~.~.~ Coaxial opposed tools {2}
355.4.~.~.~.~.~ Passing through work; e.g., punch

DEFINITION

Classification: 72/355.4

Passing through work; e.g., "punch":

(under subclass 355.2) Subject matter wherein at least one of the deforming instrumentalities penetrates either singularly or in conjunction with the coaxial instrumentality all the

way through the workpiece.

(1) Note. The workpiece may be cylindrical when introduced to the deforming instrumentalities, or may be a billet that is forged to a tubular shape.