US PATENT SUBCLASS 72 / 239
.~.~.~ By means to replace tool

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}
238  DF  .~.~ With replacement of tool {1}
239.~.~.~ By means to replace tool

DEFINITION

Classification: 72/239

By means to replace tool:

(under subclass 238) Subject matter wherein the structure performs the removal and/or introduction of a tool.