Image forming apparatus

Details Image forming apparatus Image forming apparatus

2008-12-16

2011-11-08

Gray, David (Department: 2852)

Electrophotography

Control of electrophotography process

Of plural processes

C399S072000, C399S074000

Reexamination Certificate

active

08055145

ABSTRACT:
An image forming apparatus includes a controller for detecting the opening and closing of a shutter from the output from an optical sensor and controlling the opening and closing operation of the shutter based on the detected result. The controller determines that if the optical sensor is turned “ON” within a predetermined period of time from when the shutter begins opening, the operation of the shutter from the closed state to the open state is correctly detected. When no reflected light is detected by the optical sensor even after a predetermined time has elapsed, the controller determines that an anomaly has occurred and closes the shutter and repeat another detecting process.

REFERENCES:
patent: 6321044 (2001-11-01), Tanaka
patent: 7020404 (2006-03-01), Fukuda et al.
patent: 7027139 (2006-04-01), Ogihara et al.
patent: 2009/0016762 (2009-01-01), Ota
patent: 09-034312 (1997-02-01), None
patent: 11015253 (1999-01-01), None
patent: 2001-100597 (2001-04-01), None
patent: 2003-195578 (2003-07-01), None
patent: 2004-110018 (2004-04-01), None
patent: 2006-003399 (2006-01-01), None
JPO Machine Translation of Hirobe (JP 11-015253 A).

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