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    2.
    发明专利
    未知

    公开(公告)号：DE19608506B4

    公开(公告)日：2004-09-16

    申请号：DE19608506

    申请日：1996-03-05

    Applicant: SHARP KK ,  MITSUBISHI CHEM CORP

    Inventor： KIDO EIICHI ,  YUI YUHI ,  MORI TOYOKAZU ,  NOZOMI MAMORU

    IPC: G03G15/02 ,  G03G5/00 ,  G03G5/04 ,  G03G5/05 ,  G03G5/06 ,  G03G5/147 ,  G03G15/00 ,  G03G15/08 ,  G03G15/16 ,  G03G21/00

    Abstract: An image forming apparatus adopting a non-magnetic one component developing system is arranged such that a charge brush and a developing roller are aligned along the circumference of a photoreceptor drum, that is rotatably driven, in order from an upstream side in a rotating direction of the photoreceptor drum. A transfer roller is placed opposing the photoreceptor drum with a sheet transportation path in-between. The charge brush, the developing roller and the transfer roller are rotatably driven while contacting the photoreceptor drum respectively. A photoconductive layer of the photoreceptor drum is made of an organic photoconductive material, and a coefficient of friction of the photoreceptor drum and the developing roller is selected to be not more than 0.5. As this eliminates the irregularity in rotary movement of the photoreceptor, offers a quality image and reduces a driving force for the photoreceptor drum, an apparatus of a light weight and high cost can be achieved.

    3.
    发明专利
    未知

    公开(公告)号：DE69816523T2

    公开(公告)日：2004-06-03

    申请号：DE69816523

    申请日：1998-05-27

    Applicant: SHARP KK

    Inventor： KIDO EIICHI ,  WAKADA SHIGEYUKI ,  OHGOSHI TOSHIHIDE ,  ARAKI HIROSHIGE ,  IMAI YASUO ,  ISHII HIROSHI ,  YUI YUHI ,  OHTSUKA YOSHINORI

    IPC: G03G15/08

    Abstract: It is an object of the present invention to provide a developing apparatus that can protect a developer holder and a layer thickness control member from damages and a developer from scattering in itself, while preventing a surplus supply of the developer to both ends on the peripheral surface of the developer holder. In a developing apparatus (DA2), at the back side of a layer thickness control member (1) is provided a back side elastic sealing member (26) coming in contact with the side edges of a both-end elastic sealing members (2) to seal the developer together with the back side elastic sealing member and the both-end elastic sealing members at both ends. The both-end elastic sealing members (2) seals the developer at both ends of a developer holder (3) of its peripheral surface.

    5.
    发明专利
    未知

    公开(公告)号：DE69532553D1

    公开(公告)日：2004-03-18

    申请号：DE69532553

    申请日：1995-11-14

    Applicant: SHARP KK

    Inventor： KATOH KEIJI ,  ARAKI HIROSHIGE ,  IMAI YASUO ,  WAKADA SHIGEYUKI ,  KIDO EIICHI ,  OTA TOSHIHIRO ,  YUI YUHI

    IPC: G03G15/08

    Abstract: A developer cartridge (20) for image forming apparatuses which performs development to form images with non-magnetic, one-component type developer. The developer cartridge (20) comprises a developing roller (22) for supplying developer (24) to a photoconductor drum (5a), a developer feed roller (23) for conveying and supplying developer (24) to the developing roller (22) which is placed in non-contact with the developing roller (22) and a developer-layer thickness control member (27) for controlling the thickness of the developer layer of the developing roller (22) in a developer tank (49). The developer feed roller (23) is shaped as a regular polygonal prism. The above configuration contributes to increased capacity of conveyance as compared with circular-section developer feed rollers of the prior art. Additionally, since no recess sections are formed in the surface of the regular polygonal prism, the torque does not increase when developer (24) is scrubbed, thus ensuring consistent operation. The result is improved image quality. Non-magnetic, one-component type developer (440) is deposited in a compressed manner on the developing roller (444) located in the region of development which faces a photoconductor (401) with latent images formed thereon, by supplying the developer (440) in the developer tank (441) to the developer-conveying, developing roller (444) via the agitation roller (442) and the feed member (443) and then sending the supplied developer (440) into the bottleneck between the developing roller (444) and the applying member (446). The developer which passes through the bottleneck is controlled for a consistent amount of application to the developing roller (444) by its temporarily residing in the developer reservoir confined by the developing roller (444), the control roller (445) and the applying member (446), for pressurization thereof to ensure application of the developer (440) to the developing roller (444), followed by rotation of the control roller (445). The above configuration serves to lower friction of developer with the developing roller (444) and the control roller (445), thereby preventing deposition of developer (440) on the control roller (445) while establishing a consistent amount of developer (440) applied to the developing roller (444).

    7.
    发明专利
    未知

    公开(公告)号：DE69734229D1

    公开(公告)日：2005-10-27

    申请号：DE69734229

    申请日：1997-07-22

    Applicant: SHARP KK

    Inventor： KIDO EIICHI ,  YUI YUHI ,  WAKADA SHIGEYUKI ,  OHGOSHI TOSHIHIDE ,  MURAKAMI SATOSHI ,  KAWAKAMI TAKAHIRO

    IPC: G06K15/12 ,  B41J2/44 ,  G06K15/14

    Abstract: For input image data ('A') before conversion, each pixel is converted into N (=3) parts. In this case, the three sub-pixels of data corresponding to a recording pixel (black pixel) are converted into recording sub-pixels on both sides of the three ('B'). This eliminates the density variation within a single pixel. Therefore, it is possible to reduce the dot spacing at slanted area, for example, and hence eliminate jaggies, providing a reproduced image easily recognized.

    Development equipment and associated non-magnetic one-component developer
    10.
    发明专利
    Development equipment and associated non-magnetic one-component developer 未知

    公开(公告)号：DE19608747A1

    公开(公告)日：1996-09-12

    申请号：DE19608747

    申请日：1996-03-06

    Applicant: SHARP KK ,  TOMOEGAWA PAPER MFG CO LTD

    Inventor： YUI YUHI ,  KIDO EIICHI ,  WAKADA SHIGEYUKI ,  OTA TOSHIHIRO ,  KATOH KEIJI ,  OKUNO RYOZO ,  SHIRAI TOSHIYUKI ,  GOTO MORIYUKI

    IPC: G03G9/08 ,  G03G9/087 ,  G03G9/09 ,  G03G9/097 ,  G03G13/08 ,  G03G15/08

    Abstract: Development equipment comprises a feeder for supplying nonmagnetic one-component developer; a development roller for carrying and transporting the developer; and a control for the developer layer, which is contact with the development roller. The feeder and roller are arranged so that the pressure of the developer gives a certain thickness on the surface of the roller; and the developer has a dielectric constant from 2.0 to less than 2.9 and a dielectric loss of 4.52x10 to 8.57x10 . Also claimed is a non-magnetic, one-component developer for use in this appts. Pref. the control consists of stiff metal and the roller and control exert a force of 15-45 g/cm on the developer layer. One wall of a container for the developer acts as regulator and extends towards the control, so that the tip of the feeder is in contact with the control and the developer is passed between the feeder and roller by rotation. The feeder is a polygonal roller, esp. with 5-8 edges.

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