US PATENT SUBCLASS 264 / 323
.~.~.~.~ Sliding motion between material and mold surface (extruding finite articles)

Current as of: June, 1999
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264 /   HD   PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES

239  DF  MECHANICAL SHAPING OR MOLDING TO FORM OR REFORM SHAPED ARTICLE {10}
299  DF  .~ Shaping against forming surface (e.g., casting, die shaping, etc.) {10}
319  DF  .~.~ Applying heat or pressure {6}
320  DF  .~.~.~ Reshaping solid work or introducing solid work into mold cavity {5}
323.~.~.~.~ Sliding motion between material and mold surface (extruding finite articles)

DEFINITION

Classification: 264/323

(under subclass 320) Processes in which the reshaping of a solid preform is effected by establishing a rubbing, wiping or sliding action between the preform and a shaping surface.

(1) Note. Included within the scope of the subclass is pressing a preform between mold surfaces and causing the preformed material to be reshaped and spread along the mold surfaces into an unconfined area. When such an operation is

caused by striking the preform with a shaping element causing the material to be extruded out between the shaping surfaces the process is usually referred to as impact extrusion.

SEE OR SEARCH THIS CLASS, SUBCLASS:

165+, for formation of continuous or indefinite length articles by extrusion methods.

325, for processes of reshaping a preform in a closed mold cavity.