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Browse Prior Art Database

TONER CARTRIDGE WITH CONTACT WIPER

IP.com Disclosure Number: IPCOM000027169D
Original Publication Date: 1995-Aug-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 4 page(s) / 153K

Publishing Venue

Xerox Disclosure Journal

Abstract

Many electrostatographic printing machines include a replaceable toner cartridge for permitting a customer to replace the toner cartridge at the end of its service life. Replaceable toner cartridges generally include an electrical contact for enabling communication with the machine controller to indicate that the toner cartridge is, in fact, situated within the machine housing or to provide a signal that the toner supply is low. Although a customer replaceable toner cartridge feature provides convenience for the customer, this feature also tends to exacerbate toner contamination problems within the developer cavity. Toner contamination can be caused by toner particles escaping from the developer housing when the toner cartridge is removed, toner becoming airborne due to improper mating between the developer housing and the toner cartridge, or improper installation of the toner cartridge by the customer, among other factors. Contamination due to airborne toner particles results in nonuniform exposure, increased background, and generally unacceptable copy quality, as well as unscheduled maintenance and repair by skilled service technicians.

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XEROX DISCLOSURE JOURNAL

TONER CARTRIDGE WITH CONTACT WIPER
Eric N. Florack

Proposed Classification
U.S. C1.355/200 Int. C1. G03g 15/00

XEROX DISCLOSURE JOURNAL - Vol. 20, NO. 4 July/August 1995 311

FIG. I

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TONER CARTRIDGE WITH CONTACT WIPER(Cont'd)

Many electrostatographic printing machines include a replaceable toner cartridge for permitting a customer to replace the toner cartridge at the end of its service life. Replaceable toner cartridges generally include an electrical contact for enabling communication with the machine controller to indicate that the toner cartridge is, in fact, situated within the machine housing or to provide a signal that the toner supply is low. Although a customer replaceable toner cartridge feature provides convenience for the customer, this feature also tends to exacerbate toner contamination problems within the developer cavity. Toner contamination can be caused by toner particles escaping from the developer housing when the toner cartridge is removed, toner becoming airborne due to improper mating between the developer housing and the toner cartridge, or improper installation of the toner cartridge by the customer, among other factors. Contamination due to airborne toner particles results in nonuniform exposure, increased background, and generally unacceptable copy quality, as well as unscheduled maintenance and repair by skilled service technicians.

The present disclosure is directed toward maintaining electrical contacts between a toner cartridge and a machine housing in a substantially clean condition by wiping the contacts in the housing whenever the customer installs a new toner cartridge. Frequently, escaped toner particles will cover the electrical contact in the machine housing, preventing communication of the control signal generated thereby, which, in turn, may cause the machine to become inoperable.

Turning to the figures, figure 1 shows a replaceable toner cartridge 20 being installed within a machine housing 10. The toner housing is generally held in a horizontal position and inserted into a cavity wherein a toner discharge port 22 is aligned with a developer housing (not shown). A handle 24 is provided along an outboard edge of the toner cartridge 20 for facilitating the removal and replacement of the toner cartridge 20. Figure 2 shows the underside of a typical toner cartridge 20 wherein there is provided an electrical contact 26 for mating with a...