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Browse Prior Art Database

CLEANING BLADE DEFECT SENSING ARRANGEMENT

IP.com Disclosure Number: IPCOM000026027D
Original Publication Date: 1989-Oct-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 78K

Publishing Venue

Xerox Disclosure Journal

Abstract

An elastomeric cleaning blade supported in cleaning relationship with the imaging surface of an electrophotographic device for removal of residual toner from the surface, is provided with a conductive material region at the cleaning edge of the cleaning blade. An electrical signal is applied to the conductive material region, and the electrical characteristics of the cleaning edge are monitored. Change in the electrical characteristics of the cleaning blade edge will be highly indicative of a cleaning blade failure, or impending failure. A signal based on the variations in electrical characteristics with respect to a reference voltage may be produced to create a warning indication or cause a corrective response to occur.

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(EROX DISCLOSURE JOURNAL

CLEANING BLADE DEFECT SENSING ARRANGEMENT Joan R. Ewing

Proposed Classification

U.S. C1.355/15 Int. Cl. G03g 21/00

An elastomeric cleaning blade supported in cleaning relationship with the imaging surface of an electrophotographic device for removal of residual toner from the surface, is provided with a conductive material region at the cleaning edge of the cleaning blade. An electrical signal is applied to the conductive material region, and the electrical characteristics of the cleaning edge are monitored. Change in the electrical characteristics of the cleaning blade edge will be highly indicative of a cleaning blade failure, or impending failure. A signal based on the variations in electrical characteristics with respect to a reference voltage may be produced to create a warning indication or cause a corrective response to occur.

In one embodiment, a surface adjacent the cleaning edge of the cleaning blade may be provided with a conductive coating. As the coating wears or tears, conductivity across the cleaning edge will decrease in a detectable manner. When the decrease reaches a predetermined value, a blade failure may be indicated.

In another embodiment, a cleaning blade may be fabricated to include a conductive fiber/elastomer composite with the conductive fibers oriented uniaxially and transverse to the process direction, at the cleaning edge of the blade, adjacent the surface thereof. The conductivity across the blade edge would...