Browse Prior Art Database

TONER AGITATOR FOR SINGLE COMPONENT DEVELOPMENT

IP.com Disclosure Number: IPCOM000026312D
Original Publication Date: 1991-Apr-30
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 81K

Publishing Venue

Xerox Disclosure Journal

Abstract

A combination holey tube toner agitator and a compliant brush donor roll cleaner for use in single component development xerography is disclosed. As illustrated in Figure lA, a single component developer housing 1 is comprised of an electrically biased toner moving tube 2 having machined holes of either circular or elliptical geometry 3, hence the name "holey" tube as shown in side view section of Figure lB, a charge rod 4, and a donor roll 5 .

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XEROX DISCLOSURE JOURNAL

TONER AGITATOR FOR SINGLE COMPONENT DEVELOPMENT U.S. C1.355/200 Robert E. Trott
Larry Floyd
John F. Knapp

Proposed Classification Int. C1. G03g/15/00

I \ I \ I I I I \ I \ I

\ /

FIG. IA FIG. IB

XEROX DISCLOSURE JOURNAL - Vol. 16, No. 2 MarcIdApril1991 105

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TONER AGITATOR FOR SINGLE COMPONENT DEVELOPMENT(C0nt'd)

A combination holey tube toner agitator and a compliant brush donor roll cleaner for use in single component development xerography is disclosed.

As illustrated in Figure lA, a single component developer housing 1 is comprised of an electrically biased toner moving tube 2 having machined holes of either circular or elliptical geometry 3, hence the name "holey" tube as shown in side view section of Figure lB, a charge rod 4, and a donor roll 5 .

The system performs efficient development of latent xerographic images by way of the holey tube 2 that simultaneous agitates and transports toner from the housing sump to the donor roll 5.

A preferred improvement to the system comprises attachment of compliant conductive fiber brush bristles 6 onto the outer surface of the holely tube 2 as shown in Figure 2. The brush fibers 6 provide continuous cleaning of the donor roll 5 which in turn eliminates residual toner mass from the donor roll and thereby improves copy quality by removing a potential source of image defects.

106 XEROX DISCLOSURE JOURNAL - Vol. 16, No. 2 MarcWAprill...