US PATENT SUBCLASS 264 / 565
.~.~.~.~ With internal gas bearing or mandrel

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

500  DF  DIRECT APPLICATION OF FLUID PRESSURE DIFFERENTIAL TO PERMANENTLY SHAPE, DISTORT, OR SUSTAIN WORK {14}
555  DF  .~ Production of continuous or running length {3}
563  DF  .~.~ Producing a tubular product {1}
564  DF  .~.~.~ Including deformation by application of fluid pressure {2}
565.~.~.~.~ With internal gas bearing or mandrel

DEFINITION

Classification: 264/565

With internal gas bearing or mandrel:

(under subclass 564) Processes in which the tubular product is internally shaped or supported by an internal solid member or by gas issuing from a solid internal member.