US PATENT SUBCLASS 162 / 403
.~.~.~ Contracting matrix

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  DF  .~.~ Press felting (i.e., pressure member acting on pulp on mold) {6}
403.~.~.~ Contracting matrix {1}
404  DF  .~.~.~.~> About foraminous core

DEFINITION

Classification: 162/403

(under subclass 396) Apparatus in which the mold surface generates a cylindrical cavity and pressure is exerted on the pulp slurry by causing the mold to contract thus reducing the cavity in volume.