US PATENT SUBCLASS 72 / 243.6
.~.~.~ Irregular, convex or hollow back-up roll

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

199  DF  BY USE OF ROLLER OR ROLLER-LIKE TOOL-ELEMENT {17}
237  DF  .~ With carrier for roller-couple or tool-couple {9}
241.2  DF  .~.~ Including back-up for roller {4}
243.6.~.~.~ Irregular, convex or hollow back-up roll

DEFINITION

Classification: 72/243.6

Irregular, convex, or hollow back-up roll:

(under subclass 241.2) Subject matter wherein the back-up comprises a roller wherein (1) the work engaging surface is of distinct, different diameters along its length, (2) the work engaging surface is of a first diameter at its axial center and gradually tapers to lesser diameters at its axial work engaging extents, or (3) wherein the interior thereof is void.