Browse Prior Art Database

TRANSFER ASSIST BLADE USING A LOW FRICTION TIP ON A SPRING METAL

IP.com Disclosure Number: IPCOM000027533D
Original Publication Date: 1997-Aug-31
Included in the Prior Art Database: 2004-Apr-08
Document File: 2 page(s) / 103K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is an improvement to transfer assist blades, such as disclosed in United States Patent No. 4,947,214, to Baxendell et al., which have been used in printing systems. Typically, the blade is placed adjacent to an image transfer device, such as a corotron, to contact the backside of a copy sheet to substantially eliminate spaces between the copy sheet and a developed image on a photoreceptor. The blade comprises a Mylar film with a predetermined width corresponding to a selected size of the copy sheet. The Mylar film is supported on the shield of the corotron, and is actuated by a solenoid system mechanically engaged to a metal plate, which is, in turn, moved by the solenoid to move the Mylar film to the backside of the copy sheet.

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XEROX DISCLOSURE JOURNAL

TRANSFER ASSIST BLADE USING A LOW FRICTION TIP ON A SPRING METAL Daniel L. Carter

Proposed Classification
U. S. C1. 399/318 Int. Cl. G03g 15/00

FIG. 7A

70

f-

72 FIG. 7B

XEROX DISCLOSURE JOURNAL - Vol. 22, No. 4 July/August 1997 201

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TRANSFER ASSIST BLADE USING A LOW FRICTION TIP ON A SPRING METAL (CONT'D)

Disclosed is an improvement to transfer assist blades, such as disclosed in United States Patent No. 4,947,214, to Baxendell et al., which have been used in printing systems. Typically, the blade is placed adjacent to an image transfer device, such as a corotron, to contact the backside of a copy sheet to substantially eliminate spaces between the copy sheet and a developed image on a photoreceptor. The blade comprises a Mylar film with a predetermined width corresponding to a selected size of the copy sheet. The Mylar film is
supported on the shield of the corotron, and is actuated by a solenoid system mechanically engaged to a metal plate, which is, in turn, moved by the solenoid to move the Mylar film to the backside of the copy sheet.

During printed document processing the blade is constantly moved toward copy sheets resulting in deterioration of the Mylar film. The deterioration causes a decrease in the contact pressure force of the Mylar film against the backside of the copy sheet.

The invention provides a transfer assist blade with improved longevity and holding force. Referring to the Figures 1(A) and (B), the improved transfer assist blade 10 of the present invention c...