Image forming apparatus and fixing temperature control method

Details Image forming apparatus and fixing temperature control method Image forming apparatus and fixing temperature control method

2005-09-20

2005-09-20

Lee, Susan (Department: 2852)

Electrophotography

Control of electrophotography process

Responsive to copy media characteristic

C399S066000, C399S069000

Reexamination Certificate

active

06947679

ABSTRACT:
An image forming apparatus has sufficient fixing stability and load capacity and being free of sheet jamming and poor image formation. An image forming apparatus includes a transfer voltage applying section for applying a voltage to a transfer section; a transfer current detector for detecting the transfer current flowing through the transfer section; a fixing section for fixing the toner image to fixing position at a predetermined temperature; and a size detector for detecting the size of the recording material. The transfer voltage applying section applies a predetermined transfer voltage, while the recording material passes through the transfer section, so that the transfer current is kept a constant current. When the predetermined transfer voltage is lower than a threshold voltage and the size of the recording material is larger than the predetermined size, the fixing section fixes the toner image at a temperature which is lower than the predetermined temperature.

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