| 摘要 |
PROBLEM TO BE SOLVED: To quickly start a control of preventing a low-temperature fixation offset at the time of starting a printing operation by controlling so that fixation may be executed after the surface temperature of a hot-wire fixation rotary member reaches the appropriate temperature for fixation and after heating for a prescribed time at the appropriate temperature for fixation. SOLUTION: In order to thoroughly supply a power for quickly increasing the temperature up to the appropriate temperature for fixation, a processing operation is not executed at an early stage(prior to a printing operation), the power is distributed to the fixing device 17 in a concentrated state, and after the temperature of the hot-wire fixing roller 17a rises up to the appropriate temperature for fixation, the temperature is controlled for the prescribed time, but the heat is emitted from the surface of the roller 17a, then, even in the case of turning a halogen lamp 171g off, the occurrence of overshooting is prevented. This is because the heat on the surface of the roller 17a is diffused inside and the surface temperature immediately drops. Thus, even in the case of executing the on - off control, or a phase control, etc., just after the temperature rises up to the appropriate temperature for fixation, temperature ripples become less.
|
