Image forming apparatus and method of warning life of charging roller in image forming apparatus
US9400469B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 2015 |
| Grant date | Jul 26, 2016 |
| Priority date | — |
| Expiry date | Jun 15, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes a charging roller, a temperature sensor, a humidity sensor, a sampling part, a life consumption degree calculating part and a warning processing part. The sampling part executes temperature/humidity inputting process inputting temperature of the temperature sensor and humidity of the humidity sensor. The life consumption degree calculating part calculates a life consumption degree of the charging roller from a last time to a present time in the temperature/humidity inputting process by applying respective representative values of last and present inputted temperature and humidity into a model formula. The warning processing part outputs a warning when an addition value of the life consumption degrees exceeds a predetermined threshold value. The life consumption degree calculating part uses the model formula deriving larger life consumption degree in a case where the representative value of the temperature and the representative value of the humidity are respectively larger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.