US PATENT SUBCLASS 264 / 312
.~.~.~ Inner relatively rotating member to form hollow article

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}
310  DF  .~.~ By rotation of material or material shaping member {2}
312.~.~.~ Inner relatively rotating member to form hollow article

DEFINITION

Classification: 264/312

(under subclass 310) Processes in which a recess is formed, enlarged or maintained by a correspondingly shaped means for such recess which means performs such function by a rotation relative to the body containing such recess.