Minolta Camera Kabushiki Kaisha

Shinji Takiguchi

Soichi Iwao

Toshio Sakata

Susumu Tanaka

Sanji Inagaki

The disclosure is directed to a heat roller fixing device for use in an electrophotographic copying apparatus and the like, which includes a heating roller constituted by laminating an offset prevention layer on an electrically conductive core member and having a heating element incorporated in it so as to be driven for rotation by a driving unit, and a pressure roller constituted by forming an electrically insulative layer on another electrically conductive core member and held in contact under pressure with the heating roller for simultaneous rotation with the heating roller, so as to fix toner image formed on copy paper onto the copy paper by causing the copy paper carrying the toner image on it, to pass between the heating roller and pressure roller. The offset prevention layer is composed of fluorine resin containing carbon fibers in a combined amount of less than 30%.

Offset prevention layer for heat roller fixing device

A fixing apparatus for use in a copying machine and the like which includes upper and lower fixing rollers suitably heated and contacting each other for simultaneous rotation to define a path between them through which copy paper sheets to be fixed pass, applicator member for applying offset prevention solution to one of the fixing rollers, and a smoothing roller with oil absorbing property arranged to contact under pressure the surface of the one of the fixing rollers applied with the offset prevention solution for simultaneous rotation. The smoothing roller is arranged to function to absorb excessive offset prevention solution applied onto the surface of the one of the fixing rollers and also to uniformly distribute the offset prevention solution adhering to the surface of the one of the fixing rollers.

Method of fixing developed electrophotographic images uses oil absorbing

A fixing device for an electrophotographic copying machine which includes a pair of rollers forming a nip therebetween through which the copy paper passes and an applicator which is capable of feeding a sufficient quantity of offset-preventing liquid only to the portion of the rollers where the leading end of the copy paper, will contact with the supply of offset-printing liquid to the remaining portion of the rollers being minimized to a quantity necessary for the preventing of offset. The consumption of offset-preventing liquid is reduced and the swelling of the silicone rubber coatings on the rollers, when used, is inhibited.

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Toyokawa, Japan

Shinji Takiguchi