Browse Prior Art Database

TRANSFER BLADE TIMING SETUP

IP.com Disclosure Number: IPCOM000026981D
Original Publication Date: 1994-Oct-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 99K

Publishing Venue

Xerox Disclosure Journal

Abstract

In xerograpic copying and printing systems, transfer blades are often used to assist in the transfer of the developed image to the surface of a copy sheet. The transfer blade is a device that applies a force against the back or rear surface of a copy sheet passing through the transfer station. Use of the transfer blade is intended to iron-out deformities in the copy sheet, assuring contact between the sheet and the photoreceptor, and thereby improving transfer. Accordingly, it is important for the blade to touch down on the back side of the copy sheet as the sheet and developed image concurrently reach the transfer zone. In a system employing a gripper bar arrangement to move the copy sheet through the system, for example the system disclosed in U.S. Patent No. 5,128,726 to Cassano et al., issued July 7,1992, assigned to Xerox Corporation, the timing of the transfer blade must be such that the transfer blade misses the sheet grippers. Furthermore, the blade must retract slightly before the end of the copy sheet to avoid contact with the photoreceptor belt.

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XEROX DISCLOSURE JOURNAL

TRANSFER BLADE TIMING SETUP

Robin E. Smith U.S. C1.3551277 James D. Apolito

Proposed Classification

Int. C1. G03g 15/14

In xerograpic copying and printing systems, transfer blades are often used to assist in the transfer of the developed image to the surface of a copy sheet. The transfer blade is a device that applies a force against the back or rear surface of a copy sheet passing through the transfer station. Use of the transfer blade is intended to iron-out deformities in the copy sheet, assuring contact between the sheet and the photoreceptor, and thereby improving transfer. Accordingly, it is important for the blade to touch down on the back side of the copy sheet as the sheet and developed image concurrently reach the transfer zone. In a system employing a gripper bar arrangement to move the copy sheet through the system, for example the system disclosed in U.S. Patent No. 5,128,726 to Cassano et al., issued July 7,1992, assigned to Xerox Corporation, the timing of the transfer blade must be such that the transfer blade misses the sheet grippers. Furthermore, the blade must retract slightly before the end of the copy sheet to avoid contact with the photoreceptor belt.

Typically, visual inspection of the timing blade pickup and touchdown was employed, where the blade and an attached ink pad were used to mark the rear of copy sheets run through the system during setup. The present disclosure describes an improved method of adjusting the transfer timing blade setup, where the resulting timing parameters are stored in non-volatile memory (NVM) for subsequent use by t...