US PATENT SUBCLASS 162 / 396
.~.~ Press felting (i.e., pressure member acting on pulp on mold)

Current as of: June, 1999
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162 /   HD   PAPER MAKING AND FIBER LIBERATION

232  DF  APPARATUS {22}
382  DF  .~ Foraminous forming mold for discrete articles (pulp molding) {9}
396.~.~ Press felting (i.e., pressure member acting on pulp on mold) {6}
397  DF  .~.~.~> Plural molds (cavities) {1}
399  DF  .~.~.~> Plate or sheet type {1}
401  DF  .~.~.~> Flexible diaphragm {1}
403  DF  .~.~.~> Contracting matrix {1}
405  DF  .~.~.~> Expanding and/or contracting core
406  DF  .~.~.~> About foraminous core

DEFINITION

Classification: 162/396

(under subclass 382) Apparatus in which at least a portion of the liquid of the slurry fiber supply is expressed through the foraminous mold by a solid member moving toward the foraminous molding surface to increase the pressure of the slurry against the mold surface.

(1) Note. In these devices the pressure differential between the two faces of the molding surface may be increased

or supplemented during the molding step by applying a vacuum behind the mold face.

(2) Note. The pressing surface opposed to the foraminous molding surface may itself be a foraminous molding surface.