US PATENT SUBCLASS 100 / 316
.~.~.~.~ Piston and box type

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}
315  DF  .~.~.~ Reciprocating platen-type press {8}
316.~.~.~.~ Piston and box type {1}
317  DF  .~.~.~.~.~> Heating or cooling element in box wall {1}

DEFINITION

Classification: 100/316

Piston and box type:

(under subclass 315) Apparatus including a material enclosing housing, wherein the rigid planar surface is movable within the confines of a housing to compress the material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

240+, for a piston and box type press, per se.

SEE OR SEARCH CLASS

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

200+, for a mixing or kneading device upstream of a plastic or article former.