US PATENT SUBCLASS 264 / 569
.~.~.~.~.~ Including annular fluid contact

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}
566  DF  .~.~.~.~ With application of external pressure or vacuum {3}
569.~.~.~.~.~ Including annular fluid contact

DEFINITION

Classification: 264/569

Including annular fluid contact:

(under subclass 566) Processes in which fluid is applied externally in a band around the circumference of a tubular product which band is of much shorter length than the tubular article.