US PATENT SUBCLASS 264 / 541
.~.~.~ Of irregular or varying cross section

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}
523  DF  .~ Including application of internal fluid pressure to hollow finite length parison to expand same into conformity with female mold part {10}
540  DF  .~.~ Including extrusion {2}
541.~.~.~ Of irregular or varying cross section

DEFINITION

Classification: 264/541

Of irregular or varying cross section:

(under subclass 540) Processes in which the formed article is of nonuniform cross section throughout its length, or a portion thereof, which may result from a gradual change in transverse dimension or through intermittent or repeated separated irregularities therein.