US PATENT SUBCLASS 264 / 907
DIRECT APPLICATION OF FLUID PRESSURE DIFFERENTIAL TO SHAPE, RESHAPE (I.E., DISTORT), OR SUSTAIN AN ARTICLE OR PREFORM AND CRYSTALLIZING OF NONSTRETCHED OR MOLECULARLY UNORIENTED PORTION THEREOF

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264 /   HD   PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES

907DIRECT APPLICATION OF FLUID PRESSURE DIFFERENTIAL TO SHAPE, RESHAPE (I.E., DISTORT), OR SUSTAIN AN ARTICLE OR PREFORM AND CRYSTALLIZING OF NONSTRETCHED OR MOLECULARLY UNORIENTED PORTION THEREOF {1}
908  DF  .~> Crystallizing of neck portion of hollow article or hollow preform

DEFINITION

Classification: 264/907

DIRECT APPLICATION OF FLUID PRESSURE DIFFERENTIAL TO SHAPE, RESHAPE (I.E., DISTORT), OR SUSTAIN AN ARTICLE OR PREFORM AND CRYSTALLIZING OF NONSTRETCHED OR MOLECULARLY UNORIENTED PORTION THEREOF:

(under the class definition) Cross-reference art collection directed to a process under the ... wherein (a) a positive or negative fluid pressure differential is applied through a medium of liquid or gas in direct contact with a workpiece to form, reform, or sustain the workpiece, and (b) the workpiece is treated to crystallize only a nonelongated or molecularly unoriented portion thereof.

(1) Note. In this subclass, crystallizing refers to the establishment of a long range order within the polymeric mass wherein intermolecular attractions (e.g., hydrogen bonding, Van der Vaal forces, etc.) stabilize the polymeric chains into a regular lattice often typified by a characteristic X-ray diffraction pattern.

(2) Note. In this subclass, crystallizing is not limited to use of heating or cooling. Thus, utilization of only pressure to crystallize would be proper hereunder.