Image forming apparatus having a plurality of control modes of thermal fixing apparatus
US5241349A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Feb 10, 1992 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | Feb 10, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/205
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus comprises a thermal fixing apparatus having a heat generating member and heat-fixing an image on paper, a section for discriminating a using frequency of the image forming apparatus, and a section for controlling a fixing temperature having a first temperature control mode maintaining the temperature of the thermal fixing apparatus to be a first temperature at which the image can be fixed, a second temperature control mode maintaining the temperature of the thermal fixing apparatus to be a second temperature, which is lower than the first temperature by a predetermined temperature, and a third temperature control mode stopping current supply to a heat generating member of the thermal fixing apparatus. Moreover, the fixing temperature control section selects either the second control mode or the third control mode in accordance with an output of the using frequency discriminating section when a non-image forming operation period continues for a predetermined period of time while the fixing temperature control section is operating in the first temperature mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.