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Seo Tetsuya, Murakami Eisaku, Sato Masahiko, Kawasumi Masanori, Yoshinami Hideki, Uchitani Takeshi, Taguma Kenichi, Hashimoto Shunichi: Developing device, process cartridge, and image forming apparatus. Ricoh, October 23, 2008: JP2008-257213 (8 worldwide citation)

PROBLEM TO BE SOLVED: To provide a developing device capable of forming an image in which density unevenness and toner scattering are prevented, and to provide a process cartridge and an image forming apparatus that use the developing device.SOLUTION: In a first housing part 14b, the replenishment o ...


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TAKAHASHI YASUFUMI, OHYAMA KUNIHIRO, YAMANE MASAYUKI, UCHITANI TAKESHI, HAYAKAWA TADASHI, TAKAHASHI TAKUJI, OKABE SHOUJI, SHINSHI AKIRA, UEDA YUICHIRO, TAKAHASHI MASAKI, SATOH YUUKI: DISPOSITIF DE MEMORISATION DINFORMATIONS, DISPOSITIF AMOVIBLE, CONTENANT POUR DEVELOPPATEUR, ET APPAREIL DE FORMATION DIMAGES, INFORMATION STORAGE DEVICE, REMOVABLE DEVICE, DEVELOPER CONTAINER, AND IMAGE FORMING APPARATUS. RICOH COMPANY, RICOH COMPANY, SMART & BIGGAR, August 29, 2017: CA2782610 (7 worldwide citation)

Provided is a substrate in which a terminal that comes in contact with a body side terminal installed in an image forming apparatus to communicate information and a hole engaged with a protruding section installed in the image forming apparatus body are formed. An earth terminal engaged with a body ...


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Shintani Takashi, Yoneda Takuji, Koike Toshio, Yanagida Masahito, Kumagai Naohiro, Nagashima Hiroyasu, Sanpei Atsushi, Murakami Eisaku, Kawasumi Masanori, Uchitani Takeshi, Tomita Masami: Cleaning device, processing cartridge, image forming apparatus, and toner used for these. Ricoh, November 25, 2004: JP2004-334092 (6 worldwide citation)

PROBLEM TO BE SOLVED: To provide a cleaning device, which improves cleaning performance, and which maintains good cleaning performance for a long period of time even if using polymerized toner.SOLUTION: The cleaning device 6 cleans the surface of an image carrier 1. The cleaning device 6 includes: a ...


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Murakami Eisaku, Tomita Masami, Amamiya Masaru, Yanagida Masahito, Kumagai Naohiro, Shintani Takashi, Tawada Takaaki, Arai Yuji, Koike Toshio, Tabuchi Takeshi, Takahashi Yutaka, Uchitani Takeshi, Kawasumi Masanori: Lubricant for electrophotography, lubricant-coating device, process cartridge and image-forming device. Ricoh, June 30, 2005: JP2005-171107 (6 worldwide citation)

PROBLEM TO BE SOLVED: To provide a lubricant for electrophotography by which the amount of toner passing through a cleaning blade and remaining in a photoreceptor is reduced so as to be less than the conventional one regardless of the condition of the formed image even by using the toner formed into ...


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Arai Yuji, Yanagida Masahito, Kumagai Naohiro, Shintani Takashi, Tawada Takaaki, Amamiya Masaru, Koike Toshio, Yoneda Takuji, Tabuchi Takeshi, Takahashi Yutaka, Murakami Eisaku, Uchitani Takeshi, Tomita Masami, Kawasumi Masanori: Process cartridge, waste toner bottle, toner bottle and image forming apparatus. Ricoh, July 14, 2005: JP2005-189523 (5 worldwide citation)

PROBLEM TO BE SOLVED: To provide a process cartridge preventing an eject port, ejecting waste toner from a process cartridge, from being opened by mistake.SOLUTION: The process cartridge 11 is provided with an image carrier 10 and at least a cleaning means 14 and can be detached from an image formin ...


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Yanagida Masahito, Nagashima Hiroyasu, Kumagai Naohiro, Koike Toshio, Sanpei Atsushi, Kawasumi Masanori, Murakami Eisaku, Uchitani Takeshi, Tomita Masami, Shintani Takashi, Yamagami Tsutomu: Charging roller cleaning mechanism, process cartridge and image forming apparatus. Ricoh, December 24, 2004: JP2004-361916 (4 worldwide citation)

PROBLEM TO BE SOLVED: To provide a charging roller cleaning mechanism by which substance adhering to the surface of a charging roller is efficiently removed and which can maintain good cleaning performance over a prolonged period of time.SOLUTION: The charging roller cleaning mechanism for cleaning ...


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Shintani Takashi, Koike Toshio, Yanagida Masahito, Kumagai Naohiro, Sanpei Atsushi, Nagashima Hiroyasu, Kawasumi Masanori, Murakami Eisaku, Uchitani Takeshi, Tomita Masami: Cleaning device, image forming device, and toner used for the same. Ricoh, August 12, 2004: JP2004-226685 (4 worldwide citation)

PROBLEM TO BE SOLVED: To provide a cleaning device that is free from a cleaning failure on an image carrier by means of electrostatic removal and that is capable of effectively removing filming even when polymerized toner is used.SOLUTION: The cleaning device 6 is provided with a conductive brush 61 ...


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Yanagida Masato, Nagashima Hiroyuki, Kumagai Naohiro, Koike Toshio, Sampe Atsushi, Kawasumi Masanori, Murakami Eisaku, Uchitani Takeshi, Tomita Masami, Shintani Takeshi, Yamakami Tsutomu: Cleaner, and process cartridge and image forming apparatus including the cleaner. Ricoh, November 17, 2004: EP1477867-A1 (3 worldwide citation)

A cleaner (2b) for cleaning a surface of a charging roller (2a). The cleaner (2b) contains a roller having a shaft and a cleaning roller (2c) which is rotatbly mounted on the driving shaft. The cleaning roller (2c) is made of a non-cellular foam resin having a density of from 5 to 15 kg/m, preferabl ...



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