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POST-FUSER COPY SHEET DECURLER

IP.com Disclosure Number: IPCOM000025265D
Original Publication Date: 1984-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 84K

Publishing Venue

Xerox Disclosure Journal

Abstract

The fuser assembly 54, as shown in the figure comprises a centrally heated roll 56 which is supported above a pressure roll 58. To fuse the toner images carried by the copy sheets, the sheets are moved through the nip 62 formed between the two rolls such that the images contact the heated roll. A plurality of stripper fingers 64 (only one of which is shown) are provided to remove the copy sheets from the pressure roll. The fingers are preferably fabricated from a resin material such as Teflon (a trademark of E. I. duPont). The tips of the fingers touch the surface of the pressure roll at approximately 1/8 of an inch from the nip 62 and the fingers are disposed at an angle of 35 degrees relative to a plane tangent to the pressure roll surface in the area of the nip. The purpose of such positioning of the fingers is so that they can effect a reverse bending of the copy sheets, such bending being in the direction opposite to that caused by the pressure roll. This reverse bending has the effect of straightening out the copy sheets to thereby substantialiy reduce or eliminate objectionable curl.

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XEROX DISCLOSURE JOURNAL

POST-FUSER COPY SHEET DEClJRLER Proposed Edward F. Bowler, Jr. Classification

US. C1. 355/3FU Int. Cl. G03g 15/00

54 7-

The fuser assembly 54, as shown in the figure comprises a centrally heated roll 56 which is supported above a pressure roll 58. To fuse the toner images carried by the copy sheets, the sheets are moved through the nip 62 formed between the two rolls such that the images contact the heated roll. A plurality of stripper fingers 64 (only one of which is shown) are provided to remove the copy sheets from the pressure roll. The fingers are preferably fabricated from a resin material such as Teflon (a trademark of E. I. duPont). The tips of the fingers touch the surface of the pressure roll at approximately 1/8 of an inch from the nip 62 and the fingers are disposed at an angle of 35 degrees relative to a plane tangent to the pressure roll surface in the area of the nip. The purpose of such positioning of the fingers is so that they can effect a reverse bending of the copy sheets, such bending being in the direction opposite to that caused by the pressure roll. This reverse bending has the effect of straightening out the copy sheets to thereby substantialiy reduce or eliminate objectionable curl.

Volume 9 Number 2 March/April 1984 I51

[This page contains 1 picture or other non-text object]

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POST-FUSER COPY SHEET DECURLER (Cont'd)

A chute or guide 60 is also provided which maintains the reverse bend induced into the...