US PATENT SUBCLASS 264 / 209.8
.~.~.~ Providing special flow channel feature (e.g., varying dimension of flow channel or varying direction of flow of material in the extruder, etc.)

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

165  DF  FORMING CONTINUOUS OR INDEFINITE LENGTH WORK {8}
176.1  DF  .~ Shaping by extrusion {11}
209.1  DF  .~.~ Hollow article {5}
209.8.~.~.~ Providing special flow channel feature (e.g., varying dimension of flow channel or varying direction of flow of material in the extruder, etc.)

DEFINITION

Classification: 264/209.8

Providing special flow channel feature (e.g., varying dimension of flow channel or varying direction of flow of material in the extruder, etc.):

(under subclass 209.1) Processes wherein special features of the flow channel in the extruder are included, e.g., varying dimensions of the flow channel or varying the direction of flow of material in the extruder, etc.