Photocopying – Contact printing – Light boxes
Patent
1992-02-25
1993-10-05
Grimley, A. T.
Photocopying
Contact printing
Light boxes
219216, 355290, G03G 1520
Patent
active
052509982
ABSTRACT:
In a toner image fixing device, there are provided an endless belt being looped up around a heating roller and a conveyance roller, a pressure roller for pressing a sheet having a toner image onto the heating roller with the endless belt intervening between the pressure roller and the heating roller. A sensor is disposed inside the loop of the belt so as to come in contact with the heating roller, for detecting the temperature of the heating roller. The fixing temperature for the toner image is controlled on the basis of the temperature of the heating roller detected by the sensor. A first nip region is formed on a pressing portion located between the heating roller and the fixing roller. A second nip region is formed between the belt and the fixing roller, continuing from the first nip region but without contacting the heating roller.
REFERENCES:
patent: 3810735 (1974-05-01), Moser
patent: 4455079 (1984-06-01), Miwa et al.
patent: 4542978 (1985-09-01), Tarumi et al.
patent: 4563073 (1986-01-01), Reynolds
patent: 4780742 (1988-10-01), Takahashi et al.
patent: 4905051 (1990-02-01), Satoh et al.
patent: 5085962 (1992-02-01), Aslam et al.
Fukuchi Masakazu
Haneda Satoshi
Kawamoto Kiyoaki
Miwa Tadashi
Morita Shizuo
Grimley A. T.
Konica Corporation
Royer William J.
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