US PATENT SUBCLASS 100 / 337
.~.~.~ Helix-type press

Current as of: June, 1999
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100 /   HD   PRESSES

70 R  DF  WITH ADDITIONAL TREATMENT OF MATERIAL {6}
92  DF  .~ Heating, cooling, or drying {4}
305  DF  .~.~ In press {4}
337.~.~.~ Helix-type press {3}
338  DF  .~.~.~.~> Plural helices
339  DF  .~.~.~.~> Temperature conditioning means in chamber wall or jacket
340  DF  .~.~.~.~> Temperature conditioning means within helix

DEFINITION

Classification: 100/337

Helix-type press:

(under subclass 305) Apparatus wherein the means for

subjecting the material to compressive force surface is a rotating member having a fin or fins extending spirally about and along the axis of rotation and the material is compressed by being forced by the forwarding movement through a constricted passage of cross section smaller than that of the uncompressed material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

145, for a helix-type press, per se.

SEE OR SEARCH CLASS

165, Heat Exchange,

87, for a screw-type heat exchanger.

222, Dispensing, 236+, for helical rotary dispenser.

366, Agitating,

79+, 156.1+, and 318+ for a screw-type conveyor or agitator and subclasses 144+ for heating and cooling means in an agitator.

425, Plastic Article or Earthenware Shaping or Treating: Apparatus,

200+, for a mixing or kneading device upstream of a plastic or article former, especially subclass 208 wherein the kneading device is in the form of a helix.

432, Heating, for the residual class for apparatus or a related method for the generation of heat and its application to material, where the heat generating means is more than nominally recited.