US PATENT SUBCLASS 264 / 559
.~.~.~.~ With downward movement of workpiece

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}
555  DF  .~ Production of continuous or running length {3}
557  DF  .~.~ Including liquid contact {4}
558  DF  .~.~.~ Including internal liquid contact {1}
559.~.~.~.~ With downward movement of workpiece

DEFINITION

Classification: 264/559

With downward movement of workpiece:

(under subclass 558) Processes in which the workpiece is caused to travel in a downward direction in or into a liquid bath after an initial forming step or the workpiece is caused to travel in a downward direction into annular liquid contact after an initial forming step.

(1) Note. The initial forming step is typically the extrusion of the tubular workpiece.