Konica Corporation

Konishiroku Photo Industry Co., Ltd.

Kazuhiko Uneme

Kazuo Yasuda

Masashi Saito

Hiroshi Yamazaki

Tatsuya Nagase

Meizo Shirose

Junichi Hamada

Yoshiki Nishimori

Haruo Iwahashi

Yoshio Yamazaki

Kiyoaki Kawamoto

Tetsuko Omoto

Takeichi Shimada

A method of controlling a fixing temperature of a fixing device having a heat roller provided with a heat source and a first temperature detector provided at the vicinity of the heat roller, and having a pressure roller, which is in pressure contact with the heat roller, provided with a second temperature sensor at the vicinity of the pressure roller, having the steps of; detecting a temperature of the pressure roller by the second temperature detector; and varying a control temperature of the heat roller according to a detected temperature of the pressure roller.

Fixing temperature control method utilizing new factors and image forming apparatus

A fixing device includes a pair of fixing rollers to heat toner images and to fix the toner images on a recording medium in which at least one roller coming into contact with toner is provided thereon with fluorine containing resins and a device for coating fluorine containing silicone oil on the surface of the fluorine containing resins at a coating amount of not more than 1.4.times.10.sup.-6 cc/cm.sup.2.

Fixing device and method of fixing

A fixing method comprises the step of passing a recording material with a toner image between a heat member and a pressure applying member contacting the heat member to fix the toner onto the recording material, a silicone oil being coated on the surface of the heat member, wherein the toner contains a polyester comprising a unit derived from an aromatic polycarboxylic acid or its anhydride or a unit derived from an aromatic polyhydric alcohol, and the silicone oil is a fluorine-containing silicone oil having a structure unit represented by the following Formula (I): Formula (I) ##STR1##

Heat fixing method

A fixing device includes a fixing member, the surface of which composed of a fluororesin layer, a pressure member which is brought into contact with the surface of the fixing member; a heating member for fusing a toner image on a recording medium, which passes between the fixing member and pressure member, through the fixing member. The device further includes a hollow oil roller for coating toner repellent oil, which is accommodated inside a hollow of the roller, onto the surface of the fixing member. The outer layer of the oil roller is made of a porous layer into which a fluorine-containing surface active agent is impregnated.

Toner image fixing device

Disclosed is a toner image forming method, comprising steps of: (1) forming a latent image on an image carrying member, (2) developing said latent image with toner particles including a resin and a colorant so as to form a toner image, said toner particles having a volume average particle size of 5 to 10 .mu.m, and containing toner particles having particle sizes of not more than 5.04 .mu.m in 5 number.multidot.% to 60 number.multidot.%, (3) transferring said toner image onto an image receiving material, and (4) fixing said transferred toner image on said image receiving material, said fixing steps comprising (a) passing said image receiving material between a movable fixing member and a rotatable pressure applying member each having a surface facing each other, (b) heating said toner image by a heater incorporated in said fixing member, and (c) coating the surface of said fixing member facing said pressure applying member with a fluorine-containing silicone oil by a coating roller, said fluorine-containing silicone oil having a structure unit represented by Formula I: Formula I ##STR1## wherein X represents an alkyl group having 1 to 4 carbon atoms or an aryl group, Rf represents a fluoroalkyl group having 2 to 10 carbon atoms and n represents an integer of 1 to 4.

Toner image fixing method using fluorine containing silicone oil

The present invention provides a compact developing apparatus, wherein there is provided a developer container having first magnetic brush carrier for developing the image information at one side thereof and a developing replenishing container at other side thereof, the developing container and the developing replenishing container are so constructed to be one body. The partition wall is located between the both containers and has a opening portion to communicate the both containers. Second magnetic brush carrier is provided at the opening portion to replenish the developer from the developer replenishing container to the developer container. The second magnetic brush carrier can be operated automatically in accordance with the concentration of the developer.

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Hachioji, Japan

Kazuhiko Uneme