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METHODS FOR REMOVING DEVELOPED TONER HALOS

IP.com Disclosure Number: IPCOM000025503D
Original Publication Date: 1985-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 53K

Publishing Venue

Xerox Disclosure Journal

Abstract

In some single component development systems, e.g. with magnetic toner, after development, toner is usually found scattered outside the boundaries of developed images on a photoreceptor surface. This distribution of powder, referred to as toner "halo", may be removed by the methods of this disclosure.

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XEROX DISCLOSURE JOURNAL

METHODS FOR REMOVING DEVELOPED TONER HALOS U.S. Cl. 355/3R Lloyd F. Bean

Proposed Classification

Int. C1. G03g 15/00

In some single component development systems, e.g. with magnetic toner, after development, toner is usually found scattered outside the boundaries of developed images on a photoreceptor surface. This distribution of powder, referred to as toner "halo", may be removed by the methods of this disclosure.

In one method, following development, the photoreceptor surface is brushed using a soft brush having electrically conductive bristles. This reduces the strength of fringe fields which produced the halo deposit, then causes discharge of the halo toner particles, and finally removes them physically by the brushing action. Suitable brushes may contain bristles that consist of metal or conductive plastic f i be rs .

The removal of toner halos can also be accomplished by using other methods; e.g., using an AC corona biased to the appropriate potential, or by using a deformable conductive contact roll or an extra conductive toner roll to discharge "wrong sign" toner in the image prior to transfer. For the best result, the bias on the discharge device should equal the potential of the photoreceptor in non-image or background areas and the latent image on the photoreceptor must be present.

Volume 10 Number 5 September/October 1985 29 1

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