Apparatus discriminating the transport condition of a recording

Details Apparatus discriminating the transport condition of a recording Apparatus discriminating the transport condition of a recording

1997-08-26

1998-12-08

Grimley, Arthur T.

Electrophotography

Diagnostics

Document handling

399 21, 399 68, 399320, G03G 1520

Patent

active

058483195

ABSTRACT:
An image forming apparatus and a fixing device used therein capable of discriminating transport condition of a sheet in the fixing device without sheet sensors. The fixing device is provided with a fixing roller for heating unfixed toner borne on a sheet and fixing the toner onto the sheet. A temperature sensor is arranged for detecting the temperature of the fixing roller, which temperature sensor communicating with a controller of the image forming apparatus or the fixing device. The controller discriminates the transport condition of the sheet based on the temperature change of the fixing roller detected by the temperature sensor so as to execute varied control.

REFERENCES:
patent: 4512649 (1985-04-01), Derimiggio
patent: 5627634 (1997-05-01), Koh

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