US PATENT SUBCLASS 100 / 240
.~ Box and piston type

Current as of: June, 1999
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100 /   HD   PRESSES

214  DF  RECIPROCATING PRESS CONSTRUCTION {26}
240.~ Box and piston type {6}
241  DF  .~.~> Piston carried box frame scrapers
242  DF  .~.~> Adjustable size
243  DF  .~.~> Plier type (i.e., plural handles)
244  DF  .~.~> Plural opposing pistons
245  DF  .~.~> Box guided piston
246  DF  .~.~> Movable or removable box section {2}

DEFINITION

Classification: 100/240

(under subclass 214) Apparatus in which there are material retaining side walls around one of the pressure surfaces so as to constitute a chamber and the other pressure surface moves between the sidewalls as the pressure surfaces are brought toward one another to apply compressive force to the material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

232, for presses having three or more platens, several of which platens may be so located as to form a box.

SEE OR SEARCH CLASS

65, Glass Manufacturing,

305+, for a glass press molding machine.

72, Metal Deforming, appropriate subclasses, for a closed-die press for plastically shaping metal. Particularly, see 253.1+, for an extrusion machine and 347+ for a deep drawing machine, each utilizing a bottomless "through" die, and subclasses 352+ for a forging machine in which a cuplike female die entraps the shaped work.

131, Tobacco,

119, for molds, per se, for use in molding tobacco into plugs, in plug or compressed tobacco shape making machines.

220, Receptacles,

578+, for an internal closure-like member which rests on the unused contents of a container.

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

412+, for a press molding apparatus comprising a plunger-mold couple for plastic or fluent material not otherwise provided for; see the search notes thereunder.