Image forming apparatus having capacitance detection
US9069312B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2013 |
| Grant date | Jun 30, 2015 |
| Priority date | — |
| Expiry date | Jun 25, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/1652
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes a conductive member paired with one of a developer carrying member and an image bearing member to form a capacitor. A contact-separation member assumes a first position for bringing the developer carrying member into contact with the image bearing member and a second position for separating the developer carrying member from the image bearing member. A detecting unit detects a value relating to a capacitance of the capacitor when a voltage is applied to the capacitor, and a control unit detects whether or not the image forming apparatus is ready for image formation by comparing a first detected result and a second detected result to each other. The first detected result is detected when the contact-separation member assumes the first position, and the second detected result is detected when the contact-separation member assumes the second position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.