US PATENT SUBCLASS 264 / 909 DIRECT APPLICATION OF FLUID PRESSURE DIFFERENTIAL TO STRETCH AN ARTICLE OR PREFORM AND HEAT SHRINKING OF STRETCHED ARTICLE OR PREFORM
Current as of: June, 1999
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DIRECT APPLICATION OF FLUID PRESSURE DIFFERENTIAL TO STRETCHAN ARTICLE OR PREFORM AND HEAT SHRINKING OF STRETCHED ARTICLEOR PREFORM:
(under the class definition) Cross-reference art collection directed to a process under the ... wherein (a) elongation of a workpiece occurs when a positive or negative fluid pressure differential is applied through a medium of a liquid or gas in direct contact with the workpiece, and (b) the resulting elongated workpiece is heated to contract at least one dimension thereof, thus forming a shrunken article.
SEE OR SEARCH THIS CLASS, SUBCLASS:
900+, for heat-setting of stretched or molecularly oriented articles.
906+, for crystallizing of a nonstretched or molecularly unoriented portion of a workpiece.
