US PATENT SUBCLASS 72 / 226
.~ Plural roller-couples (e.g., successively or optionally usable)

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.~ Plural roller-couples (e.g., successively or optionally usable) {3}
227  DF  .~.~> With material-handling between successive couples {4}
232  DF  .~.~> Including one roller common to two roller-couples (e.g., three-high mill) {1}
234  DF  .~.~> Including successively-acting roller-couples {1}

DEFINITION

Classification: 72/226

Plural roller couples (e.g., successively or optionally usable):

(under subclass 199) Subject matter including more than one roller-couple* to deform work.

(1) Note. Included in this subclass are disclosures wherein one roller couple is used to deform a particular workpiece and another roller couple is used, at the option of the operative, to deform the same workpiece again or to deform another workpiece. Subclasses indented hereunder, especially subclasses 234+, are the loci of disclosures wherein the same workpiece is deformed by two or more roller couples acting successively.

(2) Note. A disclosure of a single roller couple used repeatedly on the same workpiece will not be placed in this subclass as an original patent, but will be placed on the basis of claimed structure. For example, in some disclosures such repeated use is accompanied by a "screw down" adjustment between passes, for which adjustment subclass 248 is the locus. Other such disclosures may be accompanied by work-handling means, for which means subclasses 250+ is proper.

(3) Note. In the definitions and notes of subclasses indented hereunder, the word "material" wherever used refers only to that metal which has emerged as product from a first-acting roller couple, and is to be entered as work into a second-acting roller couple.