Electrophotographic image forming apparatus and method for detecting release of development nip
US10564568B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2019 |
| Grant date | Feb 18, 2020 |
| Priority date | — |
| Expiry date | Jan 4, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/1832
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is a method of detecting release of a development nip of an image forming apparatus that includes a photoconductor and a developing roller to contact each other to form a development nip and to be away from each other to release the development nip. The method includes obtaining a reference load, after charging the photoconductor in a state in which the development nip is formed, by measuring a load of a transfer system including the photoconductor and a transfer roller, release the development nip and blocking light irradiated from an exposing unit to the photoconductor, obtaining a detected load by measuring a load of the transfer system after exposing the photoconductor, and determining whether the development nip is normally released based on the reference load and the detected load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.