Image forming apparatus having multiple image forming modes
US10274885B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2018 |
| Grant date | Apr 30, 2019 |
| Priority date | — |
| Expiry date | Jun 15, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/556
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes an image bearing member, a developer bearing member, an updating device to update toner consumption based on a number of dots corresponding to laser irradiation by which toner is consumed, and an alerting device to alert an alarm concerning a residual amount of the toner based on toner consumption updated by the updating device. Image formation is performed in a first mode at a first peripheral speed ratio representing a ratio of a peripheral speed of the developer bearing member to a peripheral speed of the image bearing member, and in a second mode at a second peripheral speed ratio, which is greater than the first peripheral speed ratio. The alerting device alerts the alarm based on a total number of dots, which is smaller as an operation frequency of the second mode and becomes higher in an operation frequency of the first mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.