US PATENT SUBCLASS 264 / 903
.~ Heat-setting and simultaneous differential heating of stretched or molecularly oriented section of article or preform

Current as of: June, 1999
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264 /   HD   PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES

900  DF  DIRECT APPLICATION OF FLUID PRESSURE DIFFERENTIAL TO SHAPE, RESHAPE (I.E., DISTORT), OR SUSTAIN AN ARTICLE OR PREFORM AND HEAT-SETTING (I.E., CRYSTALLIZING OF STRETCHED OR MOLECULARLY ORIENTED PORTION) THEREOF {5}
903.~ Heat-setting and simultaneous differential heating of stretched or molecularly oriented section of article or preform

DEFINITION

Classification: 264/903

Heat-setting and simultaneous differential heating of stretched or molecularly oriented section of article or preform:

Process under cross-reference art collection 900 wherein subsequent to elongating or molecularly orienting using differential fluid pressure, the stretched or molecularly oriented workpiece is simultaneously heat-set and subjected to differential heat treatment such that one section of the stretched or oriented portion of the workpiece is subjected to a higher temperature than another section of the stretched or oriented portion of the workpiece.

(1) Note. If there is a heat differential between an unoriented neck portion of an article and an oriented portion of the same article, placement under this subclass is improper unless there is also a heat differential within the oriented (i.e., non-neck) portion of the article.