Image forming apparatus having a toner carrying member
US7444091B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2006 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Oct 14, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00059
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The difference between the light reception output signals representing the amounts of regularly and irregularly reflected light as measured, with optical detecting means that can measure the amount of regularly and irregularly reflected light simultaneously, when no toner is adhered to a transfer belt is set as a reference value, a corrected output value is calculated by correcting, based on the reference value, the difference between the light reception output signals representing the amounts of regularly and irregularly reflected light as measured when a toner image is formed, and the amount of toner adhered to the transfer belt is calculated based on the corrected output value. With transfer belts of different colors, if their surface gloss is equal to or lower than a predetermined value, the relationship between the coverage ratio and the toner adhesion amount remains approximately identical. Thus, when a transfer belt whose initial surface gloss is equal to or lower than 20 at a measurement angle of 60 degrees, the amount of toner adhered can be measured precisely until the expiration of the warranted use period of the belt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.