Browse Prior Art Database

PAPER TRAY DESIGN TO MINIMIZE ROLL FUSER WRINKLE

IP.com Disclosure Number: IPCOM000024631D
Original Publication Date: 1981-Jun-30
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 64K

Publishing Venue

Xerox Disclosure Journal

Abstract

It has been observed that a common cause of paper wrinkle in roll fusers is due to a moisture gradient that is formed in a stack of paper exposed to a high humidity environment. In other words, the edges of the paper take on more moisture than the central part thereof, particularly in those sheets postioned in the middle of a stack of paper. This moisture gradient results in the edges of the sheets in the direction of feed being longer than the center.

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IXEROX DISCLOSURE JOURNAL

PAPER TRAY DESIGN TO MINIMIZE ROLL FUSER WRINKLE Thomas Szlucha

Proposed Classification
U.S. Cl. 355/3 Int. Cl. G03g 15/00

It has been observed that a common cause of paper wrinkle in roll fusers is due to a moisture gradient that is formed in a stack of paper exposed to a high humidity environment. In other words, the edges of the paper take on more moisture than the central part thereof, particularly in those sheets postioned in the middle of a stack of paper. This moisture gradient results in the edges of the sheets in the direction of feed being longer than the center.

Accordingly, a paper tray structure is disclosed which minimizes this phenomenon. As shown in the figure, a tray 10 for holding sheets of paper 11 comprises a bottom wall 12 and a pair of side moisture barriers 14 and 16. These barriers may be fabricated from metal, plastic or closed cell foam. The top sheets of paper absorb moisture from the top, therefore, they reach moisture equilibrium quickly, and do not exhibit the aforementioned problem. Thus, the tops of the barriers can be bent outwardly as indicated at 18 and 20 in order to facilitate inaction of a stack of paper.

Volume 6 Number 3 May/June 1981 141

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142 XEROX DISCLOSURE JOURNAL

Volume 6 Number 3 May/June 1981

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