Canon Kabushiki Kaisha

Hiroaki Komatsu

Masataka Kato

Toshimitsu Danzuka

Asako Tomida

Masaya Uetsuki

Tsuyoshi Ibe

Taku Yokozawa

Kazuo Suzuki

Mitsutoshi Nagamura

Yuhei Oikawa

Hiroaki Shirakawa

Yosuke Ishii

Satoshi Azuma

Hiroshi Taira

Masaki Yamada

Hideya Arimura

Yutaka Kawamata

Jumpei Jogo

Kazuhiko Sato

Fumihiko Utsuno

Shin Genta

Seiji Tsuru

Masashi Uno

Ryosuke Takayama

Koji Yatsu

An electrophotographic roller comprising a substrate and a foam layer on an outer peripheral surface of the substrate, the foam layer constituting an outer surface of the electrophotographic roller, the foam layer comprising cells each of which opens on the outer surface, and the foam layer having a zero-point charge measured using a standard carrier of 40 μC/g or more.

Electrophotographic roller, process cartridge and electrophotographic image forming apparatus

Provided is an electrophotographic member that shows a small increase in electrical resistance value even when used under a low-temperature environment. The electrophotographic member is an electrophotographic member including an electroconductive substrate and a resin layer on the electroconductive substrate, wherein the resin layer contains an anion, inorganic particles having a hydrophobicity degree of 40% or more and 80% or less, and a resin having a specific cation structure.

Electrophotographic member, process cartridge, and electrophotographic image-forming apparatus

Provided is an electrophotographic member in which the increase in tackiness is small even in an environment of high temperature and high humidity. The electrophotographic member includes an electroconductive substrate and a surface layer, the surface layer contains resin including at least one of a urethane bond and an amide bond, the resin includes a cationic structure and an anionic structure in a molecule, and also includes a particular main-chain structure with hydrophobicity.

Electrophotographic member, process cartridge, and electrophotographic apparatus

Provided an electrophotographic member having an excellent electroconductivity and being capable of forming a high quality electrophotographic image even in long-term use. The electrophotographic member comprises an electroconductive substrate and an electroconductive layer on the substrate, the electroconductive layer containing a matrix polymer, and a specific imidazolium salt.

Electrophotographic member, process cartridge and electrophotographic image forming apparatus

There is provided a member for electrophotography, which contributes to formation of a high-quality electrophotographic image. The member for electrophotography includes an electro-conductive substrate and an electro-conductive layer as an outermost layer, wherein the electro-conductive layer contains a resin having a nitrogen-containing heterocyclic cation structure, an anion, and a specific carbon black.

Member for electrophotography, process cartridge and electrophotographic apparatus

The electrophotographic member includes an electro-conductive substrate, a urethane resin having a structure of structural formula (1), an anion, and a resin particle, and has a protrusion derived from the resin particle on an outer surface thereof, the resin particle contains one or both of a urethane resin and a polyamide resin, the resin layer further contains carbon black, and the carbon black extracted from the resin layer has a BET specific surface area of 33 m/g or more and 133 m/g or less, and DBP absorption amount at a 70% torque value in DBP absorption measurement of 42 ml/100 g or more and 90 ml/100 g or less.

Electrophotographic member, process cartridge and electrophotographic apparatus

Provided an electrophotographic member that contributes to the formation of a higher grade of an electrophotograph than ever for use in an ultralow-temperature environment. The electrophotographic member has an electro-conductive resin layer, and the resin layer comprises a resin having a specific structure and an anion.

A recording apparatus is capable of executing multiple types of different temperature control. A recording head of the recording apparatus has multiple temperature sensors disposed at different positions from each other in the recording head. Each of the multiple types of different temperature control is performed based on representative temperatures acquired using different combinations of the temperature sensors.

Ink jet printing apparatus and ink jet printing method

After printing is performed by driving only some printing elements, the other printing elements are driven so that kogation is deposited on the surface of the other printing elements.

A driving pulse to be applied is changed when an overlapped level of invert timing of driving pulse is large.

Recording elements are driven by changing a driving pulse applied thereto in accordance with information regarding a total number of times the recording elements have been driven.

Inkjet recording apparatus and inkjet recording method

A driving pulse to be applied to a plurality of print elements in a print element array is decided based on the deviation of the discharge amount from the print elements.

Inkjet printing apparatus and inkjet printing method

The present invention provided a printing apparatus including: an ink storage section; a detection unit detecting an ink remaining amount of the section; a printhead; an air communication section communicating with the section and air; a suction unit; and a control unit. When a predetermined transport-preparation condition regarding transport of the printing apparatus is satisfied, the control unit saves information about the ink remaining amount detected by the detection unit and controls the suction unit to drain ink in the air communication section through the printhead. When a predetermined start-up condition is satisfied, the control unit controls, based on the information, the suction unit to suck ink from the printhead.

Printing apparatus and control method

In a case where the temperature difference between first and second time points detected by a first temperature sensor provided in a print head is lower than a threshold temperature, a temperature correction for the first temperature sensor is performed based on a temperature detected by a second temperature sensor provided within a printing apparatus thereof. In a case where the temperature difference is higher than the threshold temperature, a temperature correction for the first temperature sensor is performed without using the temperature detected by the second temperature sensor.

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Yokohama, Japan

Hiroaki Komatsu