US PATENT SUBCLASS 76 / 5.6
.~.~ Punching

Current as of: June, 1999
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76 /   HD   METAL TOOLS AND IMPLEMENTS, MAKING

*  DD  MACHINES {7}
5.1  DF  .~ Drill-forming or sharpening {2}
5.6.~.~ Punching

DEFINITION

Classification: 76/5.6

Punching:

(under subclass 5.1) Machine comprising changing a drill blank to a drill by the action of a fixed tool and a movable tool that moves toward the fixed tool to shape the blank therebetween.