US PATENT SUBCLASS 72 / 223
.~.~ Roller common to two tool-couples

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}
221  DF  .~ Plural passes spaced along axis of one roller of tool-couple {2}
223.~.~ Roller common to two tool-couples

DEFINITION

Classification: 72/223

Roller common to two tool couples:

(under subclass 221) Subject matter involving use of at least three tools*, forming at least two tool-couples, wherein one of the tools is a roller* which (a) cooperates with one of the other tools to comprise one tool couple*, or (b) cooperates with another of the other tools to form another tool-couple.

SEE OR SEARCH THIS CLASS, SUBCLASS:

232+, for disclosure of a similar "three-high" structure having generally cylindrical rollers.