Electrophotography – Control of electrophotography process – Control of fixing
Patent
1997-02-19
1998-03-24
Brase, Sandra L.
Electrophotography
Control of electrophotography process
Control of fixing
399 33, 399 67, 399320, 399322, G03G 1520
Patent
active
057323097
ABSTRACT:
This invention concerns an image forming apparatus provided with a fixing device for fixing an image formed on a sheet. This apparatus comprises shutters for shielding opening parts formed in the fixing device for the passage of the sheet, a driver for switching the shutters between the opened state and the closed state, a sensor for detecting the presence or absence of the opened state of the shutters, and a CPU for setting the driver moving and controlling the opening or closing motion of the shutters. The CPU compares the signal to open or close the shutters and the signal from the sensor and prohibits the fixing device from producing a fixing motion when the sensor detects the closed state of the shutters in spite of the issuance of a signal to open the shutters. Owing to this construction, the otherwise possible blockage of the sheet by the shutters provided for the fixing device can be precluded because the fixing operation of the fixing device is prohibited when the shutters are closed in spite of the issuance of the signal to open the shutters.
REFERENCES:
patent: 3778222 (1973-12-01), Suzuki
patent: 3809475 (1974-05-01), Post et al.
patent: 4348102 (1982-09-01), Sessink
patent: 5032874 (1991-07-01), Matsuuchi
patent: 5087947 (1992-02-01), Torino
patent: 5448339 (1995-09-01), Kokaji et al.
patent: 5633704 (1997-05-01), Suzuki et al.
Okuno Jinju
Yamamoto Masanori
Brase Sandra L.
Minolta Co. , Ltd.
LandOfFree
Image forming apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image forming apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image forming apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2298150