Image forming apparatus operable in color and monochromatic modes
US10656570B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 20, 2017 |
| Grant date | May 19, 2020 |
| Priority date | — |
| Expiry date | Jul 20, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0132
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes a black image forming portion, a color image forming portion, an intermediary transfer member, a transfer portion, and an executing portion capable of executing an operation in a color mode in which a color image is formed using the color image forming portion and the black image forming portion and an operation in a monochromatic mode in which a monochromatic image is formed using only the black image forming portion. The executing portion is capable of forming the monochromatic image in the operation in the monochromatic mode under application of a voltage to the black developing device. The voltage is applied under a voltage condition such that a line width is broader than a line width under a voltage condition inputted to the black developing device when the operation in the color mode is executed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.