Konica Minolta Business Technologies, Inc.

Konica Minolta, Inc.

Yukio Hosoya

Okushi Okuyama

Taiki Amemiya

Kunihiro Ogura

Tatsuya Nagase

Satoshi Uchino

Mikio Kouyama

Shigeki Takenouchi

Hiroyuki Konno

Kouji Shibata

Eiichi Sakai

Teruo Sasaki

Kenji Hayashi

Koji Shibata

Kazutoshi Kobayashi

Hiroaki Obata

Masahiro Anno

Ken Ohmura

Toshiyuki Fujita

Seijiro Takahashi

Tomoko Sakimura

Yasuko Uchino

Saburou Hiraoka

Futoshi Kadonome

Kazukuni Nishimura

Akihiko Itami

Kazue Nakamura

A developing sleeve for an electrophotographic image forming apparatus includes an aluminum alloy containing more than 0.6% by mass of silicon and conveys a developer containing a toner and a carrier.

Developing sleeve and electrophotographic image forming apparatus

An electrophotographic image forming system forms an electrostatic latent image on at least a photoreceptor, develops an image using an electrostatic charge image developing toner, and removes the toner using a cleaning blade. A tip ridge of the cleaning blade is pressed against a surface of the photoreceptor. The system includes a photosensitive layer of the photoreceptor and a surface protecting layer that is provided on a surface of the photosensitive layer. The surface protecting layer includes a polymerizable monomer having at least two polymerizable groups in a molecule and a polymer of a hole transporting compound having a polymerizable group represented by General formula (1). The tip ridge of the cleaning blade has an edge angle that is obtuse and less than 120° and is pressed against the surface of the photoreceptor at an effective contact angle that is in a range of 8 to 20°.

Electrophotographic image forming system with cleaning blade

There is provided a method of producing a blade for cleaning a toner image retainer, the method including: binding an abutting layer that abuts against the toner image retainer and a supporting layer that supports the abutting layer, wherein the maximum value D of a difference between a first loss tangent at 1 Hz and a second loss tangent at 100 Hz of the blade that includes the abutting layer and the supporting layer satisfies the formula: 0.2&#x2264;D&#x2264;0.7, wherein the maximum value D is a maximum value of a difference between the first loss tangent and the second loss tangent at temperatures within a range of 0&#xb0; C. to 50&#xb0; C.

Method of producing blade, blade, image forming apparatus, and image forming method

Provided is a cleaning member including a urethane rubber, wherein the urethane rubber has a cyclic structure portion in which a fluorine atom is directly bonded to the cyclic structure portion.

Cleaning member, production method of same, and image forming apparatus

The present invention relates to a solid lubricant to be coated on an image bearing member included in an electrophotographic image forming apparatus. The solid lubricant contains a resin particle and metal soap. The resin particle includes a particle body containing an amorphous resin as a principal component, and a fluorine atom supported on a surface of the particle body. The resin particle is a particle having a volume average particle size of 70 nm or more. The solid lubricant can sufficiently increase a cleaning effect in the image forming apparatus.

Solid lubricant, solid lubricant coater and image forming apparatus

A solid lubricant to be applied onto an image carrier of an image forming apparatus of an electrophotographic system, includes a metal soap and resin particles, and the resin particles have a particle main body constituted by a rigid resin other than fluorine-based resins, and fluorine atoms carried on the surface of the particle main body.

Solid lubricant, solid lubricant application apparatus and image forming apparatus

A solid lubricant is supplied to a surface of an image carrier of an electrophotographic image forming apparatus. The solid lubricant contains a fatty acid metal salt and polypropylene, and the polypropylene has an acid value of 1 mg KOH/g or more. The solid lubricant is a solid substance of a melt mold containing the fatty acid metal salt and the polypropylene.

Solid lubricant, electrophotographic image forming apparatus, and image forming method

A solid lubricant containing a fatty acid metal salt and a polyethylene having an acid value is prepared. The solid lubricant is disposed so as to be applied on a surface of an image bearing member of an image forming apparatus in electrophotography, and a lubricant layer is formed on the surface of the image bearing member with the solid lubricant.

Solid lubricant, image forming apparatus and image forming method

A lubricant applicator incorporated in a cleaning device disposed in an image forming apparatus having an image bearing member on which an image containing toner is formed, includes: a lubricant supplying unit that supplies lubricant; a brush roller that scrapes off the lubricant to apply the lubricant to a surface of the image bearing member; and a flicker member positioned on an upstream side from the lubricant supplying unit in a rotation direction of the brush roller, the flicker member coming into contact with the brush roller, wherein the flicker member is a plate-shaped member in which an opening is formed, the flicker member having elasticity to be allowed to elastically rock by coming into contact with the brush roller, and the opening is formed in a region with which the brush roller comes into contact.

Lubricant applicator, cleaning device, and image forming apparatus

A toner for electrostatic latent image development of the present invention includes toner particles containing toner mother particles and an external additive. The external additive contains fatty acid metal salt particles, and a volume based particle diameter (size) distribution of the fatty acid metal salt particles has two peaks on a side of smaller size and a side of larger size, respectively. A volume based mean particle diameter of the fatty acid metal salt particles having the peak on the side of smaller size is 3.0 &#x3bc;m or smaller and a volume based mean particle diameter of the fatty acid metal salt particles having the peak on the side of larger size is larger than a volume based mean particle diameter of the toner mother particles.

Electrostatic latent image developing toner, production method of the toner for electrostatic latent image development and electrophotographic image formation method

A toner for electrostatic latent image development is disclosed comprising colored particles containing a binder resin and a colorant and external-additive particles attached to the surfaces of the colored particles, wherein the external-additive particles comprise resin particles covered with an inorganic layer, and the resin particles are bound to the inorganic layer by a siloxane bond. A preparation method of the toner is also disclosed.

Toner for electrostatic latent image development and image forming method

A toner for an electrophotography and its manufacturing method are disclosed. The toner comprises toner particles containing a cross-linked polymer having two-valent crosslinking group represented by Formula (1), wherein, Ris a hydrogen atom or a chlorine atom, Ris a hydrogen atom, a chlorine atom or a methoxy group. The toner satisfies storage durability against heat as well as sufficient low temperature fixing ability.

Toner and manufacturing method thereof

Display particles having metal oxide layers formed on the surfaces of base particles containing at least a resin and a colorant, wherein the metal oxide layers comprise a polycondensation product formed by using a compound A represented by the following formula (A) and a compound B indicated by the following formula (B) as materials, and an image display apparatus loaded with the display particles:M(OR)&#x2003;&#x2003;(A)(wherein Mrepresents a silicon atom or a titanium atom; and Rrepresent an alkyl group having 1 to 4 carbon atoms respectively independently):M(R)(OR)&#x2003;&#x2003;(B)(wherein Mrepresents a silicon atom or a titanium atom; Rrepresent an alkyl group having 1 to 4 carbon atoms, a phenyl group, an acryloyloxy group, a methacryloyloxy group or an epoxy group, independently; Rrepresent an alkyl group having 1 to 4 carbon atoms independently; and n represents an integer of 2 or 3).

Display particles for image display apparatus and image display apparatus loaded with the same

An image display medium is disclosed, which medium includes a pair of substrates each having an electrode and colored particles between the pair of substrates, and the colored particles have an absolute electric charge of 0.5 to 4.0 &#x3bc;C/g.

Image display medium, preparation method thereof

Disclosed is a toner which can be charged at a designated level even when a lot of print is carried out with severity of charging by stirring and when the printing is carried out under the low temperature-low humidity or the high temperature-high humidity condition. A toner comprising (a) a particle comprising a resin and a colorant; and (b) a titanate compound on the surface of the particle, in which the titanate compound contains iron in an amount of from 100 ppm to 1,000 ppm.

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Tokyo, Japan

Yukio Hosoya