US PATENT SUBCLASS 264 / 544
.~ Starting material is nonhollow planar finite length preform or product is finite length

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}
544.~ Starting material is nonhollow planar finite length preform or product is finite length {6}
545  DF  .~.~> Including uniting plural shaped sheets to form hollow work
546  DF  .~.~> Material shaped is a fabric, per se
547  DF  .~.~> With distinct staged deformation by differential fluid pressure {2}
550  DF  .~.~> Including use of male part to stretch heated preform which is formed by a female mold which determines shape of work {1}
552  DF  .~.~> Including curing or vulcanization
553  DF  .~.~> Including use of vacuum {1}

DEFINITION

Classification: 264/544

Starting material is nonhollow planar finite length preform or product is finite length:

(under subclass 500) Processes in which the starting material is a generally planar nonhollow preform or the product of the process is a finite length sheet.

(1) Note. The starting material may be cut off a continuous or running length feed roll.

(2) Note. This subclass provides for what is generally termed sheet shaping.