Patents by Inventor Kazushige Ohnishi

Kazushige Ohnishi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11496642
    Abstract: An image forming apparatus includes processing circuitry and an image forming device. The processing circuitry is configured to acquire characteristic information of a recording medium measured, and apply a preset calculation criterion to the characteristic information to calculate an image forming condition. The image forming device is configured to form an image on the recording medium based on the image forming condition calculated by the processing circuitry.
    Type: Grant
    Filed: March 16, 2021
    Date of Patent: November 8, 2022
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazushige Ohnishi, Tomoaki Nakano
  • Publication number: 20210297545
    Abstract: An image forming apparatus includes processing circuitry and an image forming device. The processing circuitry is configured to acquire characteristic information of a recording medium measured, and apply a preset calculation criterion to the characteristic information to calculate an image forming condition. The image forming device is configured to form an image on the recording medium based on the image forming condition calculated by the processing circuitry.
    Type: Application
    Filed: March 16, 2021
    Publication date: September 23, 2021
    Applicant: Ricoh Company, Ltd.
    Inventors: KAZUSHIGE OHNISHI, TOMOAKI NAKANO
  • Patent number: 8185025
    Abstract: A developing device develops an electrostatic latent image formed on an image carrier with toner. The developing device includes a developer carrier, a developer supplying unit that supplies a developer on the developer carrier, a layer shaping member that shapes the developer supplied on the developer carrier into a thin layer, and an electric-field control member that is arranged downstream of a shaping nip formed between the developer carrier and the layer shaping member and that controls an intensity of an electric field generated between the developer carrier and the layer shaping member.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: May 22, 2012
    Assignee: Ricoh Company, Limited
    Inventors: Shintaro Yamada, Shin Murayama, Ryuji Inoue, Shuuichi Nakagawa, Kazushige Ohnishi
  • Patent number: 7865118
    Abstract: A developing device that can reliably supply toner from a toner supply roller to a developing roller and that does not generate scraping irregularities in the toner thin layer on the developing roller, and a process cartridge and an image forming apparatus having the same. The developing device has: a toner supply chamber; a developing roller provided in the toner supply chamber; a toner supply roller provided in the toner supply chamber for supplying toner to the developing roller; and a layer regulation member for forming the toner on the developing roller into a thin layer, and develops electrostatic latent images on an image carrier by applying bias voltage to the developing roller. An intermediate contact member is interposed between the developing roller and the toner supply roller.
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: January 4, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Shuuichi Nakagawa, Ryuji Inoue, Shin Murayama, Kazushige Ohnishi, Shintaro Yamada
  • Publication number: 20100028057
    Abstract: A developing device develops an electrostatic latent image formed on an image carrier with toner. The developing device includes a developer carrier, a developer supplying unit that supplies a developer on the developer carrier, a layer shaping member that shapes the developer supplied on the developer carrier into a thin layer, and an electric-field control member that is arranged downstream of a shaping nip formed between the developer carrier and the layer shaping member and that controls an intensity of an electric field generated between the developer carrier and the layer shaping member.
    Type: Application
    Filed: July 21, 2009
    Publication date: February 4, 2010
    Inventors: Shintaro YAMADA, Shin MURAYAMA, Ryuji INOUE, Shuuichi NAKAGAWA, Kazushige OHNISHI
  • Publication number: 20090208252
    Abstract: A developing device that can reliably supply toner from a toner supply roller to a developing roller and that does not generate scraping irregularities in the toner thin layer on the developing roller, and a process cartridge and an image forming apparatus having the same. The developing device has: a toner supply chamber; a developing roller provided in the toner supply chamber; a toner supply roller provided in the toner supply chamber for supplying toner to the developing roller; and a layer regulation member for forming the toner on the developing roller into a thin layer, and develops electrostatic latent images on an image carrier by applying bias voltage to the developing roller. An intermediate contact member is interposed between the developing roller and the toner supply roller.
    Type: Application
    Filed: February 4, 2009
    Publication date: August 20, 2009
    Inventors: Shuuichi Nakagawa, Ryuji Inoue, Shin Murayama, Kazushige Ohnishi, Shintaro Yamada
  • Patent number: 6441075
    Abstract: The invention relates to a polyolefin-based resin composition that is in an amount of 100 wt % in total. This composition includes (a) 60-66 wt % of a crystalline propylene-ethylene block copolymer, (b) 12-20 wt % of an ethylene-propylene copolymer rubber, and (c) 18-25 wt % of an inorganic filler. The block copolymer contains a first segment of a homopolymer of propylene and a second segment of a copolymer of propylene and ethylene, and has an isotactic pentad tacticity of at least 0.96. The ratio of the weight average molecular weight of the block copolymer to the number average molecular weight thereof is not greater than 6. The copolymer rubber contains therein 50-60 wt % of ethylene, and has a Mooney viscosity of from 45 to 55 at 125° C. The inorganic filler is one selected from the group consisting of a talc, a first combination of the talc and a glass fiber, and a second combination of the talc and a whisker. The talc has an average particle diameter of not greater than 2 &mgr;m.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: August 27, 2002
    Assignees: Nissan Motor Co., Ltd., Nihon Plast Co., Ltd., Chisso Corporation
    Inventors: Tomio Hirata, Kazuo Matsuyama, Kazuyuki Yamamoto, Kazushige Ohnishi, Minoru Adachi, Tamihiro Ohashi, Motoru Komatsu, Satoru Ichikawa, Masahiro Terada, Hirosuke Kamae, Akira Kawai
  • Publication number: 20010008915
    Abstract: The invention relates to a polyolefin-based resin composition that is in an amount of 100 wt % in total. This composition includes (a) 60-66 wt % of a crystalline propylene-ethylene block copolymer, (b) 12-20 wt % of an ethylene-propylene copolymer rubber, and (c) 18-25 wt % of an inorganic filler. The block copolymer contains a first segment of a homopolymer of propylene and a second segment of a copolymer of propylene and ethylene, and has an isotactic pentad tacticity of at least 0.96. The ratio of the weight average molecular weight of the block copolymer to the number average molecular weight thereof is not greater than 6. The copolymer rubber contains therein 50-60 wt % of ethylene, and has a Mooney viscosity of from 45 to 55 at 125° C. The inorganic filler is one selected from the group consisting of a talc, a first combination of the talc and a glass fiber, and a second combination of the talc and a whisker. The talc has an average particle diameter of not greater than 2 &mgr;m.
    Type: Application
    Filed: April 25, 1997
    Publication date: July 19, 2001
    Inventors: TOMIO HIRATA, MINORU ADACHI, TAMIHIRO OHASHI, KAZUO MATSUYAMA, KAZUYUKI YAMAMOTO, KAZUSHIGE OHNISHI, SATORU ICHIKAWA, MASAHIRO TERADA, HIROSUKE KAMAE, AKIRA KAWAI
  • Patent number: 5965654
    Abstract: A polyolefin-based plastic composition suitable for an automotive molded pillar member such as a pillar garnish. The plastic composition comprises (A) block copolymer in an amount ranging from 53 to 68 parts by weight, the block copolymer having a Melt Flow Rate (at 230.degree. C. and under 2.16 kg) ranging from 20 to 50 g/10 min. and containing crystalline polypropylene section in an amount ranging from 90 to 95% by weight, having a density of not lower than 0.908 g/cm.sup.3, and propylene-ethylene random copolymer section in an amount ranging from 5 to 10% by weight, the propylene-ethylene random copolymer section having an ethylene content ranging from 35 to 45% by weight; (B) ethylene-1-butene copolymer rubber in an amount ranging from 12 to 20 parts by weight and having a density ranging from 0.85 to 0.87 g/cm.sup.3 and a Melt Flow Rate (at 230.degree. C. and under 2.16 kg) ranging from 0.2 to 5 g/10 min.
    Type: Grant
    Filed: April 23, 1997
    Date of Patent: October 12, 1999
    Assignees: Nissan Motor Co., Ltd, Nihon Plast Co., Ltd., Japan Polychem Corporation
    Inventors: Tomio Hirata, Kazuo Matsuyama, Kazuyuki Yamamoto, Kazushige Ohnishi, Yukihito Zanka, Takuya Kurio, Takashi Niimi, Satoru Ichikawa, Motoru Komatsu, Masahiro Terada, Hirosuke Kamae, Akira Kawai
  • Patent number: 5868458
    Abstract: A pillar garnish for a front pillar disposed between a front windshield glass and a side window glass of an automotive vehicle. The pillar garnish comprises a main body section formed of plastic and secured to a vehicle body. The main body section is generally channel-shaped to cover the front pillar forming part of the vehicle body. The main body section has an inner surface facing the front pillar, and an outer surface facing a vehicle passenger inside a passenger compartment. A plurality of reinforcement ribs are formed at the inner surface of the main body section and integral with the main body section. Each reinforcement rib extends perpendicular to the inner surface. Additionally, a plurality of auxiliary ribs are formed at the inner surface of the main body section and integral with the main body section. Each auxiliary rib extends parallel with each reinforcement rib. Each rib is located between the reinforcement ribs which are located adjacent each other.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: February 9, 1999
    Assignees: Nissan Motor Co., Ltd., Nihon Plast Co., Ltd.
    Inventors: Tomio Hirata, Kazuo Matsuyama, Kazuyuki Yamamoto, Kazushige Ohnishi, Motoru Komatsu, Satoru Ichikawa, Akira Kawai, Satoru Yoshikawa