US PATENT SUBCLASS 72 / 242.4
.~.~.~.~ And second stage, equal size pair of back-up rolls


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}
242.2  DF  .~.~.~ Load bearing, equal size pair of back-up rolls {1}
242.4.~.~.~.~ And second stage, equal size pair of back-up rolls


DEFINITION

Classification: 72/242.4

And second stage, equal size pair of back-up rolls:

(under subclass 242.2) Subject matter wherein at least one of the back-up rollers is in turn supported by first and second rollers of approximately the same diameter (which may be different from the diameter of the primary back-up rolls) positioned such that their axes are parallel to each other and to the axis of the deforming roller and such that they are close to but not touching each other, such that the supported back-up roll fits between them and they receive equal shares of the force of the supported back-up roll.

(1) Note. One of the second stage back-up rolls may also serve to receive force from a second back-up roll.