Photocopying – Contact printing – Light boxes
Patent
1994-06-28
1996-07-30
Grimley, A. T.
Photocopying
Contact printing
Light boxes
219216, 355203, 355289, G03G 1520
Patent
active
055417191
ABSTRACT:
An image fixing apparatus includes a conductive fixing film, a pair of electrodes contacting the conductive fixing film, a supporting element supporting the electrodes, a pressing roller located on a side of the conductive fixing film opposite to the supporting element and having an outer elastic layer. The conductive fixing film is moved at a constant speed so that a transfer material having an unfixed toner image is nipped between the conductive fixing film and is moved. The transfer material is thus subjected to a heating and fixing operation. A thermometer detects a temperature of the electrode or one part of the supporting element. A memory stores a data-table having a relation between a power supply to the electrodes and a temperature of the thermometer. A control circuit both determines a suitable supply power from the data-table and the temperature detected by the thermometer, and controls the supply power supplied to the electrodes.
REFERENCES:
patent: 4998121 (1991-03-01), Koh et al.
patent: 5182606 (1993-01-01), Yamamoto et al.
patent: 5287154 (1994-02-01), Nakai et al.
patent: 5300999 (1994-04-01), Koh et al.
patent: 5367369 (1994-11-01), Nakai et al.
Dang Thu
Grimley A. T.
Ricoh & Company, Ltd.
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