Electrophotography – Control of electrophotography process – Control of fixing
Patent
1997-07-14
1999-02-23
Grimley, Arthur T.
Electrophotography
Control of electrophotography process
Control of fixing
399 69, 399320, G03G 1520
Patent
active
058753729
ABSTRACT:
An image forming apparatus includes a first image carrier on which a toner image forming device forms a toner image; a second image carrier provided opposite to the first image carrier, onto which the toner image on the first image carrier is transferred; first and second transfer devices for transferring the toner image on the first and second image carriers onto one side and the other side of a transfer material, respectively; and a fixing device for fixing the toner images on both sides of the transfer material transferred respectively by the first and second transfer devices. The fixing device includes first and second fixing members provided opposite to one side and the other side of the transfer material, respectively, wherein the transfer material passes between the first and second fixing members, and first and second sensors are provided for detecting temperature of the first and second fixing members respectively. The apparatus further includes a control device for controlling the toner image forming device, the first and second transfer devices, and the fixing device. The control device enables image formation on both sides of the transfer material or on one side of the transfer material, and prohibits image formation on at least both sides of the transfer material when the temperature detected by the first sensor is appropriate for the first fixing member, and the temperature detected by the second sensor is not appropriate for the second fixing member.
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patent: 4737818 (1988-04-01), Tanaka et al.
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patent: 5124756 (1992-06-01), Stelter
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patent: 5329343 (1994-07-01), Saito
Fukuchi Masakazu
Haneda Satoshi
Ikeda Tadayoshi
Matsubara Akitoshi
Sato Yotaro
Grimley Arthur T.
Konica Corporation
Tran Hoan
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