US PATENT SUBCLASS 72 / 88
.~.~ Caused by tools (e.g., "platens") relatively moving parallel to their surface

Current as of: June, 1999
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72 /   HD   METAL DEFORMING

67  DF  BY USE OF TOOL ACTING DURING RELATIVE ROTATION BETWEEN TOOL AND WORK ABOUT INTERNAL CENTER (E.G., GYRATING OR ROTATING TOOL) {10}
80  DF  .~ During rotation of work {12}
88.~.~ Caused by tools (e.g., "platens") relatively moving parallel to their surface {2}
89  DF  .~.~.~> Including rotating tool (e.g., "disk-platen")
90  DF  .~.~.~> Including stationary tool

DEFINITION

Classification: 72/88

Caused by tools (e.g., "platens") relatively moving parallel to their surface:

(under subclass 80) Subject matter wherein the work lies between two tools, each of which tools has a generally planar work-engaging surface, and wherein the work is rotated and deformed by moving one of the tools relative to the other so that the work-engaging surface of each tool moves relative to the other tool in a plane that is substantially equidistant from the generally planar work-engaging surface of the other tool during operation.

(1) Note. The term "generally planar" is intended to describe a tool comprising a plate having a plurality of ribs and grooves therein, the tops of the ribs and the bottom of the grooves lying within or between substantially parallel planes.