US PATENT SUBCLASS 264 / 532
.~.~.~ Shaping is longitudinal or axial stretching prior to or during differential fluid pressure deformation

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}
531  DF  .~.~ Including shaping by mechanical means other than fluid pressure during or subsequent to fluid pressure differential shaping {3}
532.~.~.~ Shaping is longitudinal or axial stretching prior to or during differential fluid pressure deformation

DEFINITION

Classification: 264/532

Shaping is longitudinal or axial stretching prior to or during differential fluid pressure deformation:

(under subclass 531) Processes in which, by application of physical force by a machine part, the greatest dimension of a parison or workpiece is increased.

(1) Note. The mechanical stretching may be accompanied by increased fluid pressure differential.

(2) Note. The mechanical stretching may be accomplished by internal or external contact.

(3) Note. Punching of holes in a container absent other significant deformation is not included herein. Hole formation by differential fluid pressure is provided for in subclass 504.