Photocopying – Contact printing – Light boxes
Patent
1991-07-30
1993-01-05
Grimley, A. T.
Photocopying
Contact printing
Light boxes
118DIG1, G03G 1520
Patent
active
051775506
ABSTRACT:
A heated roller type of fixing device to prevent offsetting of toner onto a fixing or pressure roller and an imaging system including such a fixing device wherein a sheet with toner deposits thereon is passed between a fixing roller and a pressure roller to fix the toner in place, a releasant applicator applies a releasant on the surface of at least one of said fixing or pressure rollers, and a releasant remover removes from the sheet the releasant deposited thereon by the fixing or pressure roller, thereby the releasant remaining on the toner image is removed by the releasant remover. Thus, it is possible to eliminate image density variations which may otherwise be caused by an uneven distribution of the releasant, as is the case with the prior art, and to obtain an image density which does not change with time and so is stable.
REFERENCES:
patent: 4231653 (1980-11-01), Nagahara et al.
patent: 4541707 (1985-09-01), Yoshinaga
patent: 4956211 (1990-09-01), Saito
Katsuno Ryuji
Miyazato Kazuhiko
Saito Hideo
Uehara Yasuhiro
Fuji 'Xerox Co., Ltd.
Grimley A. T.
Royer William J.
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