US PATENT SUBCLASS 162 / 343
.~.~.~.~ With vanes or pulp stream dividing means

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}
343.~.~.~.~ With vanes or pulp stream dividing means

DEFINITION

Classification: 162/343

(under subclass 336) Apparatus (1) having means that are perforated or provide separate passageways for the slurry.

(1) Note. The means may be a separate member immersed in the slurry stream so as to cause the stream to be divided. Examples of this type of device are immersed perforated screens, rake like members, or honeycomb structures. The means may also be separating passageways or conduits for the slurry which are not immersed but rather comprise the

conducting system for the slurry.

(2) Note. The dividing means do not permanently divide the stock stream so that separate streams are applied to the mold surface, rather they are inserted in the slurry stream and permit the stream to recombine so that the unitary sheet of slurry is applied to the mold.

(3) Note. In this subclass may also be found, for example, head boxes in which a plurality of vaned members are inserted in the stock stream to reduce the cross-section of the stream confining means to thereby increase the velocity of the stream. Also in this subclass the vanes may, for example, have the function of quieting turbulence in the stream.