Photocopying – Contact printing – Light boxes
Patent
1989-01-25
1991-09-10
Grimley, A. T.
Photocopying
Contact printing
Light boxes
118 60, 219216, 355283, G03G 1520
Patent
active
050478095
ABSTRACT:
This invention relates to a fixing apparatus where a toner image is formed on a transfer medium by passing the transfer medium between a heat roller and a press roller, each of the rollers rotating while in pressure contact with each other. An oil application roller is disposed in pressure contact with and is driven by the heat roller. The oil application roller has a layer of heat-resistant fibers on its circumferential surface. An oil-impregnated member is pressed against the oil application roller through a pressure contact surface formed of a non-woven cloth for transferring oil having a dynamic viscosity of .nu.2 in the range of 1,000 cst to 10,000 cst, to the oil application roller. The oil application roller is continuously supplied with oil from the oil-impregnated fiber member and the cloth and supplies oil having a dynamic viscosity of .nu.1, to the circumferential surface of the heat roller during rotation. The ratio of dynamic viscosities of the oils being in the range of .nu.2:.nu.1=1:3 to 30. The amount of oil applied to the transfer medium is substantially equal to the amount of oil transferred from the oil-impregnated member to the oil application roller and is substantially equal to 3.5.times.10.sup.-2 mg/100 cm.sup.2 to 0.11 mg/100 cm.sup.2.
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Ikunami Yoshikazu
Owada Akihiro
Beatty Robert
Grimley A. T.
Konica Corporation
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