Browse Prior Art Database

MOVABLE PRESSURE ROLL FINGERS

IP.com Disclosure Number: IPCOM000024338D
Original Publication Date: 1980-Apr-30
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 72K

Publishing Venue

Xerox Disclosure Journal

Abstract

This disclosure relates to a stripper mechanism for stripping copy sheets from the pressure roll of a roll fuser apparatus. It has been found that under certain conditions (i.e., when the pressure roll is cool) the copy sheets follow the contour of the pressure roll but when the pressure roll is hot, the copy sheets do not follow this path. Accordingly, stripper fingers are only needed until the pressure roll temperature becomes elevated.

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'EROX A DISCLOSURE JOURNAL

MOVABLE PRESSURE ROLL FINGERS Proposed Thomas Szlucha Classification

U.S. C1. 432/60 Int. C1. F27b 9/28

20

This disclosure relates to a stripper mechanism for stripping copy sheets from the pressure roll of a roll fuser apparatus. It has been found that under certain conditions (i.e., when the pressure roll is cool) the copy sheets follow the contour of the pressure roll but when the pressure roll is hot, the copy sheets do not follow this path. Accordingly, stripper fingers are only needed until the pressure roll temperature becomes elevated.

As shown in the figure, a heated fuser roll 10 cooperates with a pressure roll 12 to pass a copy sheet 14 therebetween. The copy sheet, as shown by the solid line, follows a straight trajectory when the pressure roll is hot and follows the trajectory, as shown in a dotted line, when the pressure roll is cold. One or more stripper fingers 16 are provided which are mounted in a cantilever fashion by means

Volume 5 Number 2 March/April 1980 217

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MOVABLE PRESSURE ROLL FINGERS (Cont'd)

of a bi-metallic support 18. As will be appreciated, the support 18 serves to move the stripper fingers out of contact with the pressure roll when the temperature of the pressure roll reaches a predetermined temperature.

A modified form of the stripper finger shown in the first figure is illustrated in the second figure. In this embodiment, fingers 20 are...