Controlling method of a copying machine
US4671643A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1985 |
| Grant date | Jun 9, 1987 |
| Priority date | — |
| Expiry date | Mar 27, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/205
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for controlling a copying machine having a copying cycle and fusing device. The fusing device is formed of a rotatable heating roller and a press roller in mutually forcible contact with the heating roller, which fuses a toner image on a copying paper at a fusing temperature upon passage through the rollers. The heating roller is heated to a first temperature above the fusing temperature. The copying cycle is delayed during a first interval of time after the heating roller reaches the first temperature. The copying cycle is set to a wait-reset state after the first time interval. The heating roller is cooled to a second temperature below the fusing temperature and the copying cycle is set to a wait state. The heating roller is heated from the second temperature to the fusing temperature during a second interval of time. The copying cycle is restored to the wait-reset state during the second time interval before the heating roller reaches the fusing temperature. The copying cycle is restored to the wait-reset state before a leading edge of the copying paper reaches the fusing device. In addition, the fusing device is at the fusing temperature when the leading edge passes be…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.