US PATENT SUBCLASS 162 / 339
.~.~.~.~ Closed to atmosphere

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

232  DF  APPARATUS {22}
289  DF  .~ Running or indefinite length product forming and/or treating means {19}
315  DF  .~.~ Means directing stock into contact with molding surface {7}
336  DF  .~.~.~ Flow box, slice, and/or approach flow {6}
339.~.~.~.~ Closed to atmosphere {1}
340  DF  .~.~.~.~.~> Air cushion at above atmospheric pressure

DEFINITION

Classification: 162/339

(under subclass 336) Apparatus in which the container or head box for the stock supply directing the stock onto the forming surface is sealed against atmospheric pressure or contact of atmosphere with the slurry supply.

SEE OR SEARCH THIS CLASS, SUBCLASS:

317, for devices in which a confined stock stream is directed onto the forming surface and in which the confining means is in sealing contact with the foraminous forming surface.