Cleaning assembly for a fixing device in image forming apparatus

Details Cleaning assembly for a fixing device in image forming apparatus Cleaning assembly for a fixing device in image forming apparatus

1998-02-23

1999-05-11

Grimley, Arthur T.

Electrophotography

Image formation

Fixing

152565, 399324, 399326, G03G15/20

Patent

active

059038098

ABSTRACT:
Wear of the surface of a heating roller caused by toner, paper powder and other like contaminants and a cleaning force are made uniform over a length of a heating roller by setting the press-contact force of a cleaning member with respect to each end portion of the heating roller smaller than the press-contact force at a portion other than the end portions on the basis of a tendency for the distribution of the toner, paper powder and the other like contaminants resulting from the rotation of the heating roller. Five attaching holes are formed at an upstream portion of a lower cover, defining the bottom of a fixing chamber in a fixing unit, lock members are not fitted into the two attaching holes corresponding to the end portions of the heating roller. Lock members are fitted into the other three attaching holes corresponding to the central portion of the heating roller in a state where a base end portion of the elastic spring member is inserted into the three attaching holes. Further, slits are formed at positions of the elastic spring member opposed to the end portions of the heating roller. Lastly, stopper projections are formed at the base end portion of the elastic spring member and the stopper grooves engaged with the stopper projections are formed at the lock members.

REFERENCES:
patent: 3935836 (1976-02-01), Bar-on
patent: 4258648 (1981-03-01), Leising et al.
patent: 4803752 (1989-02-01), Kasama
patent: 5138391 (1992-08-01), Takahashi et al.
patent: 5420678 (1995-05-01), Rasch et al.

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