US PATENT SUBCLASS 72 / 180
.~.~.~ Including plural, axially-spaced circumferential ribs and grooves

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}
176  DF  .~ By use of deflector arranged to bend work transversely of direction of work movement (e.g., troughing) {4}
179  DF  .~.~ Including complementary roller-couple {2}
180.~.~.~ Including plural, axially-spaced circumferential ribs and grooves

DEFINITION

Classification: 72/180

Including plural axially spaced circumferential ribs and grooves:

(under subclass 179) Subject matter wherein the profile of each roller (i.e., the outline of the roller's work-engaging surface at the plane) is an undulant line (i.e., is alternately convex and concave relative to the roller axis) and wherein the convexities and concavities of one roller profile interfit (or tend to interfit) with the concavities and convexities respectively of the other roller profile.

(1) Note. Figure 1 accompanying this note illustrates one example of a ribbed and grooved complementary roller-couple. An example of the product of this roller-couple is illustrated in Figure 2 accompanying this note. [figure] [caption]Figure 1. Direction of Work-piece Movement. [figure] [caption]Figure 2. Direction of Work-Piece Movement.