US PATENT SUBCLASS 162 / 358.1
.~.~ Press and felt

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.~.~ Press and felt {4}
358.2  DF  .~.~.~> With felt structure or felt composition
358.3  DF  .~.~.~> Extended nip press {2}
359.1  DF  .~.~.~> With separate heated drying means
360.2  DF  .~.~.~> Plural sequential presses {1}

DEFINITION

Classification: 162/358.1

Press and felt:

(under subclass 289) Apparatus comprising a means for subjecting wet formed paper web carried on a flexible permeable belt to solid pressure applying surfaces (e.g., roll pair, etc.).

(1) Note. In this subclass, the pressing applying surface is usually a roll couple and the felt is generally for the purpose of carrying, pressing and dewatering the fragile wet paper web or interfacing between the paper web and the pressing means. Roll couples, per se, for treating webs either wet or dry when not in combination with a felt for the web may be found in the appropriate subclasses of Class 100, presses. However, if the sole purpose of the roll couple is disclosed to be for operation with a felt for Class 162 purposes, a mandatory cross is also made in this subclass.