Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

SELECTIVE TRANSFER OF TONER IMAGES USING A GROUNDED BRUSH

IP.com Disclosure Number: IPCOM000024963D
Original Publication Date: 1983-Feb-28
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 63K

Publishing Venue

Xerox Disclosure Journal

Abstract

This disclosure relates to selective transfer of toner images with a grounded brush. The selective transfer process is one in which a dark dusting of charged toner is created on a photoreceptor exposed and then brought to a transfer station which attempts to transfer image areas only by virture of the transfer field created by the image toner charge. While the exposure step brings the surface voltage to a low value in the background areas non-electrostatic transfer of small amounts of material in these regions results from toner-paper contact. It has been demon-strated that this background transfer can be eliminated if sufficiently low pressure exists in the transfer nip. Attainment of such low transfer pressures may be achieved in the configuration described below.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 87% of the total text.

Page 1 of 2

JOURNA L

SELECTIVE TRANSFER OF TONER IMAGES USING A GROUNDED BRUSH

- -

Stephen Borostyan Kenneth Favata

Proposed Classification
U.S. C1. 355/3TR Int. CI. G03g 15/00

.

1

This disclosure relates to selective transfer of toner images with a grounded brush. The selective transfer process is one in which a dark dusting of charged toner is created on a photoreceptor exposed and then brought to a transfer station which attempts to transfer image areas only by virture of the transfer field created by the image toner charge. While the exposure step brings the surface voltage to a low value in the background areas non-electrostatic transfer of small amounts of material in these regions results from toner-paper contact. It has been demon- strated that this background transfer can be eliminated if sufficiently low pressure exists in the transfer nip. Attainment of such low transfer pressures may be achieved in the configuration described below.

l2

I

Volume 8 Number 1 January/February 1983 45

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

Page 2 of 2

SELECTIVE TRANSFER OF TONER IMAGES USING A GROUNDED BRUSH (Cont'd)

The transfer pressure may be controlled by moving pairs of pinch rollers 10 and 12 in the X dimension relative to the photoreceptor 13 and by varying the brush bristle density and length of the brush 14. If the paper 16 being used is sufficiently conducting on its back side the brush may be moved upstream from the transfer nip position 18 to the position...