Canon Kabushiki Kaisha

Nikon Corporation

Jfe Steel Corporation

Nhk Spring Co., Ltd.

Ricoh Company, Ltd.

Fujitsu Corporation

Nissan Motor Company Limited

Minolta Camera Kabushiki Kaisha

Suzuki Motor Corporation

Nec Infrontia Corporation

Ajinomoto Co., Ltd.

Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Toto Ltd.

Nec Platforms, Ltd.

Sbi Pharmaceuticals Co., Ltd.

Takeshi Suzuki

Yutaka Arai

Shigeaki Takada

Norihiko Nakamura

Katsuhisa Matsunaka

Jun Miura

Yasuhiro Miyahara

Akeshi Asaka

Masaaki Takahashi

Hiroki Iwasa

Naoki Akiyama

Hiroshi Yamamoto

Yusuke Nakagawa

Shuichi Tamura

Katsumi Kojima

Toshinori Nakayama

Haruo Sato

Toshio Kazama

Tomoki Ito

Daigo Matsuura

Yoshiyuki Kuramoto

Yasuhiro Omura

Hiroshi Kubo

Kazuo Kishino

Kosuke Machida

Masaaki Yamashita

Kenji Ishii

Masaki Kato

Takashi Saitoh

Tsutomu Watanabe

Kaoru Sato

Hatsuo Nagaishi

Minoru Nakamura

Atsushi Shibayama

Daisuke Yamada

Takashi Matsuda

Kazutoshi Ishida

Junichi Kitagawa

Hiroki Ota

Takashi Kawano

Hideki Komatsuda

Takashi Kondo

Tohru Tanaka

Takayasu Tsuchida

Eiichi Taniguchi

Naoki Kato

Masayuki Tamaki

Tsuyoshi Hashimoto

Arata Miyagi

Haruki Mori

Nobuyuki Bannai

Yoichi Tobiyama

Yuka Miyamoto

Hiroto Sugimoto

Yoshiki Ono

Mikito Suto

Shimpei Kurokawa

Yuya Baba

Satoshi Miwa

Katsuya Abe

Shinsuke Takahashi

Noritoshi Takamura

Yuji Kitano

Matsutaka Maeda

Kaoru Okamoto

Takashi Nakazawa

Yusuke Baba

Shigeki Ishikawa

Takeru Uehara

Hisato Noro

Arihiro Yamamoto

Hirobumi Nishida

Toyofumi Watanabe

Yoichiro Yamanaka

Satoru Shibata

Atsushi Hori

Yasuharu Notoya

Kiwamu Takahashi

Kaoru Maeda

Akinori Horiuchi

Mamo Matsumoto

Koichi Hayashi

Akihiko Chiba

Hisashi Tanaka

Koichi Kakubari

Shinsuke Ide

Hironori Ikezawa

Issey Tanaka

Masafuku Akatsu

Makoto Souma

Yukio Miyata

Yuji Hasegawa

Michihiko Ayada

Takuya Ishii

Takahisa Koseki

Toshimitsu Nakazawa

Takumi Tanaka

Yasuyuki Ikeda

Masayuki Aoki

Noriko Makiishi

An electrophotographic member comprising: a base material; an elastic layer on the base material; and a surface layer on the elastic layer, wherein the elastic layer comprises silicone rubber, the surface layer comprises fluoro rubber, a thickness of the surface layer is 3 μm or more, an elastic deformation power ηIT calculated from a load displacement curve, obtained with a nanoindentation test according to ISO 14577 by bringing a Vickers indenter into contact with an outer surface of the surface layer and setting a test load at 120 μN, is 30 to 50%, and a Martens hardness determined by the nanoindentation test at the outer surface of the surface layer is 12.0 to 18.0 N/mm.

Electrophotographic member and electrophotographic image forming apparatus

An electrophotographic member includes a base layer, an elastic layer, and a surface layer stacked in this order. The surface layer contains a fluorine resin and a fluorine rubber, the fluorine rubber is contained at a proportion of 0.5 parts by mass or more and 1.0 parts by mass or less with respect to 1 part by mass of the fluorine resin, and the surface layer further contains a compound represented by formula (1):CH(CH)—O—((CH)O)—OH  (1)In formula (1), m, l, and n each independently represent an integer of 1 or more.

Electrophotographic member and electrophotographic image-forming apparatus

An aluminum alloy according to the present invention includes 1.2% by mass to 4.0% by mass of copper, 4.0% by mass to 14.0% by mass of zinc, 0.5% by mass to 4.0% by mass of magnesium, 0.01% or less of silicon, and 0.01% or less of iron, with the balance containing aluminum and inevitable impurities, and has an average equivalent circle crystal grain size of 500 nm or less.

Aluminum alloy, aluminum alloy spring, and fastening member made of aluminum alloy

Provided is an electrophotographic fixing member including an elastic layer having a low hardness while maintaining a high thermal conductivity and a high strength, the elastic layer being less liable to fracture even when repeatedly compressed in a high-temperature state. The fixing member for electrophotography includes a substrate, an elastic layer on the substrate, and a surface layer in the stated order, wherein the elastic layer contains a silicone rubber and a heat conductive filler dispersed in the silicone rubber, wherein the heat conductive filler is metal oxide particles, or metal particles each having a surface at least part of which is formed of a metal oxide, and wherein the elastic layer further contains a charge control agent negatively chargeable with respect to the heat conductive filler.

Electrophotographic fixing member, fixing device, and electrophotographic image forming apparatus

A spring consists of, by mass %, 0.5 to 0.7% of C, 1.0 to 2.0% of Si, 0.1 to 1.0% of Mn, 0.1 to 1.0% of Cr, not more than 0.035% of P, not more than 0.035% of S, and the balance of Fe and inevitable impurities. The spring has a structure including not less than 65% of bainite and 4 to 13% of residual austenite by area ratio in a cross section. The spring has a compressive residual stress layer in a cross section from a surface to a depth of 0.35 mm to D/4, in which D (mm) is a circle-equivalent diameter of the cross section. The spring has a high hardness layer with greater hardness than a center portion by 50 to 500 HV from a surface to a depth of 0.05 to 0.3 mm.

Spring and manufacture method thereof

A fastening member includes a screw thread formed therein. A portion including a crest portion of the screw thread is formed of a first alloy material and includes: a thick portion where the portion is maximized in thickness in a circumferential direction; and a thin portion where the portion is minimized in thickness in the circumferential direction. A portion including a root of the screw thread is formed of a second alloy material having a tensile strength higher than that of the first alloy material.

Fastening member

An aluminum alloy contains 0.7% to 1.8% of silicon, 0.5% to 2.1% of copper, 0.4% to 1.8% of manganese, 0.6% to 1.6% of magnesium, and 0.1% to 0.7% of zinc in terms of mass ratio and the balance aluminum with inevitable impurities.

Aluminum alloy and fastener member

A variable magnification optical system comprising, in order from an object side, a first lens group G1 having negative refractive power, a second lens group G2 having positive refractive power, a third lens group G3 having negative refractive power and a rear group comprising at least one lens group and having positive refractive power as a whole; upon varying magnification, air intervals between the neighboring lens groups being varied; and said first lens group G1 consisting of lens component(s) having negative refractive power, thereby a variable magnification optical system having excellent optical performance, an optical apparatus and a method for manufacturing the variable magnification optical system, being provided.

Variable magnification optical system, optical device, and manufacturing method for variable magnification optical system

An elastic member is an elastic member formed of a wire having a cross section that is substantially circular, the cross section being orthogonal to a longitudinal direction, and the elastic member being expandable and contractible in a predetermined direction; and including: a first alloy portion that is made of an aluminum alloy having a tensile strength larger than 950 MPa and equal to or less than 1100 MPa at room temperature; and a second alloy portion configured to cover the first alloy portion, the second alloy portion having a thickness in a radial direction smaller than a radius of the first alloy portion, and being made of an aluminum alloy having a tensile strength of 100 MPa to 650 MPa at room temperature.

Elastic member and wire for elastic member

One end portion of a resin tube kept in a diameter expanded state by a plurality of diameter expanding claws is disengaged from the diameter expanding claws and is shifted onto an outer peripheral surface of a die by applying a pressing force toward the other end portion of the resin tube to an end surface of the one end portion of the resin tube.

Method for fixing resin tube to die and manufacturing method for resin-tube covered roller

Comprising, in order from an object side: a first lens group G1 having negative refractive power; a second lens group G2 having positive refractive power; a third lens group G3 having negative refractive power; a fourth lens group G4 having positive refractive power; a fifth lens group G5 having negative refractive power; and a sixth lens group G6 having positive refractive power;

Variable magnification optical system, optical device, and production method for variable magnification optical system

Provided is a fixing member for a heat fixing apparatus which can further improve utilization efficiency of heat for heat fixing of an unfixed toner. A fixing member having an endless belt shape includes a substrate and an elastic layer on the substrate, wherein the elastic layer includes silicone rubber and a filler dispersed in the silicone rubber, and when a thermal conductivity of the elastic layer in a thickness direction is defined as &#x3bb;nd, a thermal conductivity of the elastic layer in a circumferential direction is defined as &#x3bb;td, and a thermal conductivity of the elastic layer in a width direction is defined as &#x3bb;md, &#x3bb;nd is 1.30 W/(m&#xb7;K) or more, and &#x3bb;nd, &#x3bb;td, and &#x3bb;md satisfy a relationship as shown below &#x3bb;nd&#x3e;&#x3bb;md&#x3e;&#x3bb;td.

Fixing member and heat fixing apparatus

A substrate guide member is integrally formed of resin, and includes: a support portion fixed in a casing; and at least one pair of a first protrusion and a second protrusion protruding from the support portion and extending in an insertion direction with a gap from each other, to thereby form a groove for allowing passage of a substrate. The at least one pair of the first protrusion and the second protrusion includes: a plurality of guide portions configured to guide the substrate; and separated portions, which are portions connecting the plurality of guide portions and have a gap larger than the gap of the plurality of guide portions.

Substrate guide member and casing

Provided is an electrophotographic rotatable pressing member having further durability. The electrophotographic rotatable pressing member includes: a substrate; and an elastic layer formed on the substrate, the elastic layer containing a silicone rubber and a needle-shaped filler dispersed in the silicone rubber and having hollow parts, wherein, when cutting the elastic layer along a cross section including a center axis of the substrate in a longitudinal direction of the electrophotographic rotatable pressing member, and a total of each sectional area of the hollow parts in a unit area Aof a cross-sectional surface is defined as A, a standard deviation of an area ratio A/Ais 0.08 or less.

Electrophotographic rotatable pressing member and method of manufacturing the same, and fixing device

Growing community of inventors

Yokohama, Japan

Takeshi Suzuki