US PATENT SUBCLASS 72 / 401
.~.~.~ Between generally opposed-stroke tools


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

394  DF  BY THREE OR MORE COACTING RELATIVELY MOVABLE TOOLS (I.E., TOOL-COMPLEX) {4}
399  DF  .~ Concurrently actuated tools {2}
400  DF  .~.~ With coacting fixed tool {1}
401.~.~.~ Between generally opposed-stroke tools


DEFINITION

Classification: 72/401

Between generally opposed stroke tools:

(under subclass 400) Device wherein two or more of said movable tools are arranged to approach said passive tool simultaneously from substantially opposite directions.

(1) Note. The term "substantially opposite directions" is intended to include directions which afford cancellation or balancing out of much of their resultant forces on the work and the fixed tool.

Evidence of this effect may be found in disclosure of light-weight construction, ease of holding the work, rapidity of operation, etc.