Fusing system of image forming apparatus and temperature...

Electric heating – Heating devices – Combined with diverse-type art device

Reexamination Certificate

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C399S069000, C219S492000, C219S494000

Reexamination Certificate

active

07109440

ABSTRACT:
A fusing system for use in an image forming apparatus has a fusing temperature control unit having a controller which controls the surface temperature ‘T’ of the fusing roller by detecting the surface temperature ‘T’ in accordance with a predetermined temperature control period ‘t0’; comparing the surface temperature ‘T’ with a preset target temperature ‘Tt’; turning on and off the heater in accordance with a maximum power supply time ‘Max ON-time’ and a minimum power cutoff time ‘Min OFF-time’ when the surface temperature ‘T’ is lower than the target temperature ‘Tt’; and turning on and off the heater in accordance with a preset minimum power supply time ‘Min ON-time’ when the surface temperature ‘T’ is higher than the target temperature ‘Tt’.

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patent: 08220925 (1996-08-01), None

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