Device for heat-fixing a toner image
US4474456A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1982 |
| Grant date | Oct 2, 1984 |
| Priority date | — |
| Expiry date | Dec 20, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/2014
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A heat-fixing device includes a heat plate along which a transfer medium bearing thereon a toner image is advanced during which the toner image becomes fixed to the transfer medium by fusing, the heat plate including a plurality of heating sections arranged along the direction of advancement of said transfer medium each of the heating sections being provided with at least one electrical heater. The device also includes a control circuit for controlling the operation of the heaters such that, under a non-steady-condition, only selected ones of the heaters are set in operation thereby only the corresponding heating sections are positively heated; whereas, under a steady-state condition, all of the heaters are operated at the same time thereby maintaining all of the heating sections at a predetermined temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.