Image forming apparatus having failure diagnosing function
US5610689A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1996 |
| Grant date | Mar 11, 1997 |
| Priority date | — |
| Expiry date | Jan 25, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S706/90
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A detector for detecting status quantities in processes of an image forming apparatus and a correction mechanism for changing parameters are connected to a controller. By virtue of this arrangement, the amount of current associated with a primary charging device in a latent-image process, the surface potential of a photoreceptor drum and a voltage correction coefficient are fed into the controller as status quantities. By using the entered status quantities as well as membership functions and fuzzy rules that have been stored in an internal memory of the controller, the controller executes fuzzy reasoning and outputs a signal indicating the failure rate or rate of erroneous setting of each processing element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.