Ricoh Company, Ltd.

Dow Corning Toray Company, Ltd.

Canon Kabushiki Kaisha

Kajima Corporation

Teruyoshi Tanaka

Masahiro Ishida

Naoki Matsuda

Toshiyuki Kabata

Satoru Taniguchi

Hirohiko Aiba

Masaki Hirose

Takeshi Matsumura

Kumiko Seo

Hiroyuki Takasuna

Hisaya Fujita

Rie Yasuno

Toyohisa Toyama

Ichiro Soma

Akira Ito

A drive device includes a plurality of gears; and a grease composition that is held on a tooth flank of at least one gear of the gears. The at least one gear is made of a resin. The grease composition contains a hydrocarbon base oil, lithium soap serving as a thickener, and olefin resin powder. A weight ratio between the hydrocarbon base oil and the lithium soap in the grease composition is in a range of 94.5:5.5 to 96.0:4.0. A consistency of the grease composition is in a range of 360 to 400.

Drive device, image forming apparatus, and grease composition

A drive device includes a gear having a hole; a shaft that passes through the hole; and a grease composition that is held in a clearance between the shaft and an inner peripheral surface of the hole. The gear rotates on a peripheral surface of the shaft. At least one of the gear and the shaft is made of a resin. The clearance is in a range of 10 to 110 &#x3bc;m. The grease composition contains a hydrocarbon base oil and lithium soap serving as a thickener. A weight ratio of the hydrocarbon base oil to the lithium soap is in a range of 94.5:5.5 to 96.0:4.0. A consistency of the grease composition is in a range of 360 to 400.

The present invention pertains to: an additive for rubber, comprising (A) a hydrocarbon-based oil and (B) a styrene/diene block copolymer; and a rubber composition obtained by blending the additive for rubber into rubber. The present invention makes it possible to provide an additive for rubber which has little impact on the environment or the human body and enables the provision of rubber having excellent heat resistance and spring properties, as well as a rubber composition obtained by blending the same.

Additive for rubber, and rubber composition obtained by blending same

A drive device includes a slide bearing; a shaft that passes through the slide bearing; a gear that is fixed to the shaft; and a grease composition that is held in a clearance between the slide bearing and the shaft. At least one of the slide bearing and the shaft is made of a resin. The clearance is in a range of 10 to 110 &#x3bc;m. The grease composition contains a hydrocarbon base oil and lithium soap serving as a thickener. A weight ratio of the hydrocarbon base oil to the lithium soap is in a range of 94.5:5.5 to 96.0:4.0. A consistency of the grease composition is in a range of 360 to 400.

Provided is a heat fixing apparatus, which suppresses the depletion of a lubricant applied to an inside of the heat fixing apparatus and which has long life and high reliability, the heat fixing apparatus including a heating rotary member and a pressurizing rotary member, and containing, as a lubricant in a sliding portion, (A) perfluoropolyether oil having a kinetic viscosity at 40&#xb0; C. of from 100 to 200 mm/s and an evaporation loss being 1.2 mass % or less in a case where 10 g of a sample of the perfluoropolyether oil is placed in a petri dish having an inner diameter of 41 mm and allowed to stand still at 250&#xb0; C. for 200 hours and (B) polytetrafluoroethylene.

Heat fixing apparatus and grease composition for the heat fixing apparatus

Growing community of inventors

Kanagawa, Japan

Teruyoshi Tanaka