US PATENT SUBCLASS 72 / 389.3
.~.~.~.~ Elongated knife edge die (i.e., press brake)

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

380  DF  BY RELATIVELY MOVABLE OFFSET TOOL-FACES (E.G., FOR BENDING OR DRAWING) {4}
386  DF  .~ With tool motion in fixed path {3}
389.1  DF  .~.~ Between and co-planar with opposed tools {8}
389.2  DF  .~.~.~ For a small radius bend {1}
389.3.~.~.~.~ Elongated knife edge die (i.e., press brake) {1}
389.4  DF  .~.~.~.~.~> Adjustable tool face {1}

DEFINITION

Classification: 72/389.3

Elongated knife edge die (i.e., press brake):

(under subclass 389.2) Device wherein the single tool face is comprised of an elongated ridge parallel to the plane of the contraposed tool-faces, such that, as measured along the ridge the members are much much longer than wide and cooperate to create a sharp straight bend in a planar or sheet-like workpiece.