US PATENT SUBCLASS 264 / 522
.~.~ Starting material is nonhollow planar finite length preform or product is planar and of 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}
519  DF  .~ Differential temperature conditioning {2}
522.~.~ Starting material is nonhollow planar finite length preform or product is planar and of finite length

DEFINITION

Classification: 264/522

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

(under subclass 519) Processes in which the starting material is a generally planar nonhollow preform or the product is of finite length.

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

(2) Note. This subclass provides for processes generally referred to as sheet shaping or thermoforming including a step of differential temperature conditioning.