US PATENT SUBCLASS 72 / 342.8
.~.~ Preheating

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


72 /   HD   METAL DEFORMING

342.1  DF  WITH TEMPERATURE MODIFICATION OF TOOL OR OF SPECIFIED PORTION OF WORK {3}
342.7  DF  .~ Of tool {2}
342.8.~.~ Preheating

DEFINITION

Classification: 72/342.8

Preheating:

(under subclass 342.7) Subject matter comprising heating or cooling of a tool before application of the tool to the metal deforming action to prepare that tool to function in the manner as if it had previously been in operation.