Photocopying – Contact printing – Light boxes
Patent
1994-01-28
1995-06-20
Royer, William J.
Photocopying
Contact printing
Light boxes
165 89, 219216, 219469, 432 60, G03G 1520
Patent
active
054264952
ABSTRACT:
In an image forming apparatus, an image fixing device has a hollow cylindrical fixing roller implemented as a heat pipe, and a pressing roller held in pressing contact with the fixing roller. The fixing roller is made up of a fixing portion, and a paper nipping portion against which the pressing roller is constantly urged. The paper nipping portion has a greater wall thickness than the heating section. This kind of configuration promotes rapid heat conduction from a halogen heater to a working fluid filled in the heat pipe, while preventing the paper nipping portion of the fixing roller from being deformed by the pressing roller.
REFERENCES:
patent: 3952798 (1976-04-01), Jacobson et al.
patent: 4091264 (1978-05-01), Sarcia
patent: 4105896 (1978-08-01), Schuster
patent: 4172976 (1979-10-01), Namiki et al.
patent: 4229644 (1980-10-01), Namiki et al.
patent: 4284875 (1981-08-01), Namiki et al.
Higaya Toshiaki
Sawamura Eiji
Ricoh & Company, Ltd.
Royer William J.
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