US PATENT SUBCLASS 83 / 689
.~.~.~.~ Progressive cutting

Current as of: June, 1999
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83 /   HD   CUTTING

651  DF  TOOL OR TOOL WITH SUPPORT {12}
679  DF  .~ Cutting couple type {9}
684  DF  .~.~ Punching tool {4}
686  DF  .~.~.~ Shear-type male tool {3}
689.~.~.~.~ Progressive cutting

DEFINITION

Classification: 83/689

(under subclass 686) Device wherein the cutting edge of the male tool that coacts with the female tool to effect cutting is so constructed that in its intended operation the work will initially be engaged by a portion only of the edge, with other edge portions then successively engaging the work until the punching operation is completed.