US PATENT SUBCLASS 72 / 233
.~.~.~ Including roller shiftable between successive passes of work

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}
226  DF  .~ Plural roller-couples (e.g., successively or optionally usable) {3}
232  DF  .~.~ Including one roller common to two roller-couples (e.g., three-high mill) {1}
233.~.~.~ Including roller shiftable between successive passes of work

DEFINITION

Classification: 72/233

Including roller shiftable between successive passes of work:

(under subclass 232) Subject matter including means to move, or to permit movement of, said particular roller adjacent to the one roller or to the other roller to form first the one roller couple and then the other roller couple alternatively.

(1) Note. A disclosure wherein the particular roller is shifted from one roller to the other roller at the election of the operative will fit the definition above since, regardless of the frequency or infrequency or shifting, each such shift forms first one and then another roller couple.