Image forming apparatus
US11099496B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2020 |
| Grant date | Aug 24, 2021 |
| Priority date | — |
| Expiry date | Feb 3, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/065
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A charging member which is driven so that the surface of the charging member has a speed difference from the surface of an image bearing member. In a cleaning operation for cleaning the charging member by transferring toner adhering to the surface of the charging member from the charging member to the image bearing member and collecting the transferred toner with a developing member, a first charging voltage forming a potential difference between the charging member and the image bearing member is applied to the charging member, and then a second charging voltage having the same polarity as that of the first charging voltage and an absolute value greater than that of the first charging voltage is applied. The potential difference is in a direction in which electrostatic force directed from the charging member to the image bearing member acts on the toner charged to normal polarity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.