Image fixing device having heating portion at one end thereof

Details Image fixing device having heating portion at one end thereof Image fixing device having heating portion at one end thereof

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.

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