Image forming apparatus

Details Image forming apparatus Image forming apparatus

1998-09-11

1999-11-23

Beatty, Robert

Electrophotography

Diagnostics

Document handling

399 33, 399 69, G03G 1500

Patent

active

059915552

ABSTRACT:
An image forming apparatus has an image forming unit for forming an image on a recording material, a fixing device for fixing the image on the recording material, an overlap-feed detector such as a transfer current detector for detecting an overlap-feed of the recording material conveyed to the fixing device and a set temperature controller for controlling the set temperature. The fixing device is maintained at a set temperature during an image fixing operation. The controller lowers the set temperature or stops the conveyance of the recording material when the overlap-feed detector detects the overlap feed. Accordingly, the image forming apparatus can prevent a fixing device from breaking due to an overlap-feed of a recording material.

REFERENCES:
patent: 4373801 (1983-02-01), Itoh
patent: 4496238 (1985-01-01), Tsukada et al.
patent: 5503382 (1996-04-01), Hansen et al.
patent: 5512992 (1996-04-01), Kim et al.
patent: 5621504 (1997-04-01), Wakamatsu et al.
patent: 5626077 (1997-05-01), Muller
patent: 5689760 (1997-11-01), Suzuki et al.
patent: 5809367 (1998-09-01), Yoo et al.

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