US PATENT SUBCLASS 72 / 141
.~.~ By multi-convolutional tool

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

127  DF  BY DEFLECTING SUCCESSIVELY-PRESENTED PORTIONS OF WORK DURING BODILY MOVEMENT THEREOF (E.G., FOR COILING, LEVELLING, CURVING OR TROUGHING MATERIAL IN MOVEMENT) {11}
135  DF  .~ To form helical coil or tube {7}
141.~.~ By multi-convolutional tool

DEFINITION

Classification: 72/141

By multiconvolutional tool:

(under subclass 135) Subject matter wherein the instrumentality that engages and diverts successively presented portions of the moving work continues to engage and guide the produced coil through more than 360 deg. of movement of said portions around the axis-of-bend*.

(1) Note. Patents placed in this subclass disclose a deflector, pitch-adder tool having a helically-shaped path that confines the produced coil to movement within that path.