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    Image carrier and image forming apparatus using the same
    4.
    发明专利
    Image carrier and image forming apparatus using the same 有权
    使用该图像载体和图像形成装置

    公开(公告)号：JP2011043561A

    公开(公告)日：2011-03-03

    申请号：JP2009190097

    申请日：2009-08-19

    Applicant: Bridgestone Corp ,  株式会社ブリヂストン

    Inventor： NAKAJIMA TADASHI

    IPC: G03G21/00 ,  G03G5/02 ,  G03G15/00 ,  G03G15/08

    Abstract: PROBLEM TO BE SOLVED: To provide an image forming apparatus which is allowed to reduce parts used for the image forming apparatus, to reduce a price and a weight of the image forming apparatus and to simplify image forming processes. SOLUTION: The image carrier used for the image forming apparatus is characterized in that a charging body layer on the outer circumferential surface of the image carrier is formed of a resin having a volume resistance of 10 15 Ωcm or more and a Rockwell M hardness of 70° or more. The image forming apparatus using the image carrier is also provided. COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 要解决的问题：提供一种图像形成装置，其允许减少用于图像形成装置的部件，以降低图像形成装置的价格和重量，并且简化图像形成处理。 解决方案：用于图像形成装置的图像载体的特征在于，图像载体的外周表面上的充电体层由体积电阻为10 15的树脂形成， Ωcm以上，洛氏M硬度为70°以上。 还提供了使用图像载体的图像形成装置。 版权所有（C）2011，JPO＆INPIT

    DEVELOPING DEVICE AND IMAGE FORMING DEVICE
    5.
    发明专利
    DEVELOPING DEVICE AND IMAGE FORMING DEVICE 失效

    公开(公告)号：JP2001042630A

    公开(公告)日：2001-02-16

    申请号：JP21832799

    申请日：1999-08-02

    Applicant: BRIDGESTONE CORP

    Inventor： NAKAJIMA TADASHI ,  SAKATA JUNJI ,  MURATA KAZUYA ,  KAWAGOE TAKAHIRO

    IPC: G03G15/08

    Abstract: PROBLEM TO BE SOLVED: To form a good image, even under serve environmental conditions and to maintain satisfactory image formation over a long time period, even if image formation is carried out repeatedly by using polyurethane as the principal constituent of each of a developer supporting roller, a developer supplying roller and a developer layer forming blade. SOLUTION: In this developing device, polyurethane is used as the principal constituent for each of a developer support roller, a developer supplying roller and a developer layer forming blade. The polyurethane of the developer carrier roller is a polyurethane elastic body, having 40-80 deg., Asker C hardness, the polyurethane of the developer supplying roller is polyurethane foam having 30-90 deg. Asker F hardness and the polyurethane of the developer layer forming blade is a polyurethane having 30-90 deg. JIS A hardness. The developer supporting roller is obtained, by forming an electrically conductive elastic layer 12 on the periphery of a shaft 11, having satisfactory electrical conductivity and further forming a coating layer 13 on the surface of the electrically conductive elastic layer 12. The electrically conductive elastic layer 12 comprises a polyurethane material provided with electrical conductivity by adding an electrically conductive agent.

    ELECTRIFYING MEMBER, ELECTRIFYING DEVICE AND IMAGE FORMING DEVICE UTILIZING THE MEMBER
    6.
    发明专利
    ELECTRIFYING MEMBER, ELECTRIFYING DEVICE AND IMAGE FORMING DEVICE UTILIZING THE MEMBER 失效

    公开(公告)号：JP2001042605A

    公开(公告)日：2001-02-16

    申请号：JP34895199

    申请日：1999-12-08

    Applicant: BRIDGESTONE CORP

    Inventor： YAMADA TSUTOMU ,  NAKAJIMA TADASHI ,  SAKATA JUNJI ,  KAWAGOE TAKAHIRO

    IPC: G03G15/02 ,  F16C13/00

    Abstract: PROBLEM TO BE SOLVED: To provide an electrifying member, an electrifying device and an image forming device provided with this electrifying device utilizing a method, where a body to be electrified is electrified by having charges injected directly by being impressed with only DC voltage and where generation of image failures can be controlled. SOLUTION: In this electrifying member, the electrifying device and the image forming device provided with the electrifying member, the electrifying member is for electrifying the body to be electrified by the direct injection of the charge by being abutted to the body to be electrified and having only the DC voltage impressed between the body to be electrified, the member is constituted from a conductive foaming rubber body, its cell diameter is between 10 to 200 μm and the number of the cells are 100 to from 1200 pieces/25 mm.

    FORMING MEMBER OF DEVELOPER LAYER AND DEVELOPING DEVICE AND IMAGE FORMING DEVICE USING THE SAME
    7.
    发明专利
    FORMING MEMBER OF DEVELOPER LAYER AND DEVELOPING DEVICE AND IMAGE FORMING DEVICE USING THE SAME 失效

    公开(公告)号：JP2000356906A

    公开(公告)日：2000-12-26

    申请号：JP16837099

    申请日：1999-06-15

    Applicant: BRIDGESTONE CORP

    Inventor： MURATA KAZUYA ,  NAKAJIMA TADASHI ,  KAWAGOE TAKAHIRO ,  TAKAGI MITSUHARU ,  ARAI TOSHIAKI

    IPC: G03G15/08 ,  C08L61/28 ,  C08L67/00 ,  C08L69/00 ,  C08L71/02 ,  C08L75/04 ,  C08L83/04

    Abstract: PROBLEM TO BE SOLVED: To obtain a forming member of a developer layer which can stably improve and maintain the electrification amount of the developer by forming an electrification controlling layer consisting of a resin prepared by hardening a polyol with a melamine resin on the contact part of the surface of the forming member of a developer layer with the surface of a developer carrying body. SOLUTION: The forming member of a developer layer has an electrification controlling layer 2a to 2c consisting of a resin prepared by hardening a mixture of a polyol and a melamine resin on at least the contact part of the surface of the forming member of a developer layer with the surface of a developer carrying body. As for the forming member of a developer layer, for example, the following members are used. They are produced by forming the electrification controlling layer 2a on at least the surface of the supporting member 1a made of a metal or a resin to be in contact with a developer carrying body, or by forming an elastic layer 3b between the electrification controlling layer 2b and the supporting body 1b, or by forming an elastic layer 3c between the supporting member 1c and the electrification controlling layer 2c. Thereby, proper electrification of the developer can be stably maintained for a long time.

    ELECTROCONDUCTIVE POLYMER MEMBER AND IMAGE FORMING DEVICE
    8.
    发明专利
    ELECTROCONDUCTIVE POLYMER MEMBER AND IMAGE FORMING DEVICE 失效

    公开(公告)号：JPH11293128A

    公开(公告)日：1999-10-26

    申请号：JP9348298

    申请日：1998-04-06

    Applicant: BRIDGESTONE CORP

    Inventor： NAKAJIMA TADASHI ,  SAKATA JUNJI ,  KAWAGOE TAKAHIRO

    IPC: G03G15/02 ,  C08K5/19 ,  C08L75/04 ,  C08L101/02 ,  G03G15/08 ,  G03G15/16

    Abstract: PROBLEM TO BE SOLVED: To obtain an electroconductive polymer member with suppressed resistance fluctuation and excellent durability, suitable as, e.g. an electrophotographic member, by using an electroconductive polymeric material prepared by incorporating a specific quaternary ammonium salt in a polymer compound containing a polar structural unit. SOLUTION: This polymer member is obtained by using an electroconductive polymer material which is prepared by incorporating a polymer compound containing a polar structural unit such as polyurethane with a quaternary ammonium salt having one or more amido linkage such as lauroyl iminopropyl dimethyl ethyl ammonium ethyl sulfate; wherein the acid group in the quaternary ammonium salt is pref. an organic acid group such as carboxylate or alkyl sulfate. It is preferable that the other objective image forming device is manufactured by mounting the above electroconductive polymeric member.

    ELECTRIFYING MEMBER AND ELECTRIFYING DEVICE
    10.
    发明专利
    ELECTRIFYING MEMBER AND ELECTRIFYING DEVICE 失效

    公开(公告)号：JPH10207181A

    公开(公告)日：1998-08-07

    申请号：JP797397

    申请日：1997-01-20

    Applicant: BRIDGESTONE CORP

    Inventor： YAKUSHIJI MANABU ,  NAKAJIMA TADASHI ,  MASUDA YOSHITOMO ,  KAWAGOE TAKAHIRO

    IPC: G03G15/02 ,  F16C13/00

    Abstract: PROBLEM TO BE SOLVED: To obtain an electrifying member excellent in heat resistance by using polyurethane contg. polyether polyol obtd. by adding ethylene oxide and propylene oxide to polyol such as glycerol at random. SOLUTION: This electrifying member has an elastic layer of polurethane foam or elastomer mixed an electrically conductive material. Polyether polyol obtd. by adding ethylene oxide and propylene oxide to poly tol such as glycerol at random is used as starting material for the polyurethane. The amt. of ethylene oxide contained in the polyether polyol is 3-50wt.%, preferably 5-20wt.%. In the case of 50wt.%, heat resistance deteriorates.

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