Cleaning blade defect sensing arrangement
US4937633A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 21, 1989 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Jul 21, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/0017
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An elastomeric cleaning blade supported in cleaning relationship with the imaging surface of an electrophotographic device, for removal of residual toner on the surface, is provided with a cleaning edge having predetermined and detectable characteristics of the cleaning blade. An electrical signal is applied to the cleaning edge, and variations in the electrical characteristics 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 variation in electrical characteristics may be produced to create a warning indication or cause a corrective response to occur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.