US PATENT SUBCLASS 72 / 389.5
.~.~.~.~.~.~ Opposed tools having adjustable crown (i.e., provision for die crowning)

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  DF  .~.~.~.~ Elongated knife edge die (i.e., press brake) {1}
389.4  DF  .~.~.~.~.~ Adjustable tool face {1}
389.5.~.~.~.~.~.~ Opposed tools having adjustable crown (i.e., provision for die crowning)

DEFINITION

Classification: 72/389.5

Opposed tools having adjustable crown (i.e., provision for die crowning):

(under subclass 389.4) Press brake wherein the two contraposed tool faces are reshaped to compensate for the deflection of the bending mechanism under the force of the single tool face.