US PATENT SUBCLASS 162 / 358.3
.~.~.~ Extended nip press

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}
358.1  DF  .~.~ Press and felt {4}
358.3.~.~.~ Extended nip press {2}
358.4  DF  .~.~.~.~> With impermeable belt structure or impermeable belt composition
358.5  DF  .~.~.~.~> With heating means

DEFINITION

Classification: 162/358.3

Extended nip press:

(under subclass 358.1) Apparatus wherein the pressure applying surfaces include conforming opposing press means (e.g., roll opposing overlapping stationary shoe having an impermeable belt structure moving between the shoe and wet paper web, etc.) which increases the area of the nip sandwiching a continuously moving wet formed paper for dewatering thereof.

(1) Note. Thus, the nip that would normally be a single line contact point between two rolls is said to be an extended nip due to the greater pressing area of the conforming overlapping opposing press means.