Image forming apparatus and method for calculating a toner degradation rate
US9989876B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2016 |
| Grant date | Jun 5, 2018 |
| Priority date | — |
| Expiry date | Oct 18, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0164
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes a toner pattern bearer to bear a first toner pattern having a first image area and a second toner pattern having a second image area different from the first image area. A toner adhesion amount detector detects a toner adhesion amount of toner of each of the first toner pattern and the second toner pattern. A toner degradation rate calculator calculates a first deviation in the toner adhesion amount of the first toner pattern and a second deviation in the toner adhesion amount of the second toner pattern based on the toner adhesion amount detected by the toner adhesion amount detector. The toner degradation rate calculator compares the first deviation with the second deviation and calculates a toner degradation rate based on a comparison result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.