US PATENT SUBCLASS 72 / 151
.~.~ With tensioning or work

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}
149  DF  .~ By use of work-contacting wiper and moving, work-holding form {9}
151.~.~ With tensioning or work

DEFINITION

Classification: 72/151

With tensioning or work:

(under subclass 149) Subject matter including use of means for applying a tensile stress to the work during the deflecting thereof.

(1) Note. The tensioning is usually by a structure, additional to the wiper and former, that would tend to pull the work rearwardly except for the greater effect of the former that pulls the work to itself. However, this subclass (151) is also a locus of patents disclosing a wiper and former plus a "drag" or "brake" on the work that tends to retard work movement, thereby applying a tension to the work.

(2) Note. As work is bent by deflection, that side of the material facing the axis-of-bend* is placed under compression whereas the opposite side is placed under tension. The

"tension" described in this (2) Note is not sufficient to warrant placement of a patent into this subclass.