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    1.
    发明专利
    未知

    公开(公告)号：DE69930808D1

    公开(公告)日：2006-05-24

    申请号：DE69930808

    申请日：1999-09-16

    Applicant: CANON KK

    Inventor： KARAKI TETSUYA ,  NAKAYAMA YUJI ,  KAWADA MASAYA

    IPC: G03G5/14 ,  G03G21/10 ,  G03G5/02 ,  G03G5/082 ,  G03G5/10

    Abstract: An electrophotographic amorphous silicon photosensitive member is used for an electrophotographic apparatus that forms images by the electrophotographic method, and an image forming apparatus uses this photosensitive member, which includes a drum-shaped cylindrical conductive substrate, and a photosensitive layer that contains amorphous silicon, thus structuring an electrophotographic photosensitive drum. Then, the outer diameter of this photosensitive drum is configured to be gradually smaller from the vicinity of the central portion thereof in the generatrix direction to both ends in the longitudinal direction, hence making it possible to enhance the cleaning effect on residual toner.

    2.
    发明专利
    未知

    公开(公告)号：DE69830975T2

    公开(公告)日：2006-05-24

    申请号：DE69830975

    申请日：1998-12-23

    Applicant: CANON KK

    Inventor： OHWAKI HIRONORI ,  YAMAZAKI KOJI ,  EHARA TOSHIYUKI ,  KAWADA MASAYA ,  KAYA TAKAAKI ,  KARAKI TETSUYA

    IPC: G03G15/04 ,  G01R29/12 ,  G03G15/00

    Abstract: In a surface potential measuring apparatus for measuring a potential configuration by moving a photosensitive body of an image forming apparatus of electrophotographic type and at least one potential sensor relative to each other and by generating dielectric current in the potential sensor due to change in potential on a surface of the photosensitive body and by analyzing the dielectric current, a width of a detecting portion of the potential sensor is smaller than a width of the change in potential to be measured, and a sectional shape of the detecting portion in a plane perpendicular to the surface of the photosensitive body and parallel to the relative movement direction does not include any edge.

    4.
    发明专利
    未知

    公开(公告)号：DE69941551D1

    公开(公告)日：2009-12-03

    申请号：DE69941551

    申请日：1999-05-12

    Applicant: CANON KK

    Inventor： EHARA TOSHIYUKI ,  NAKAYAMA YUJI ,  KAWADA MASAYA ,  OWAKI HIRONORI

    IPC: G03G5/10 ,  G03G5/082 ,  G03G15/00

    Abstract: The present invention relates to an electrophotographic photosensitive member (101) having a cylindrical shape, and comprising a conductive substrate having a thickness not smaller than 0.1 mm and smaller than 2.5 mm, and a light-receiving layer having a photoconductive layer on the conductive substrate, the light-receiving layer containing at least amorphous silicon, wherein the photoconductive layer has a thickness not smaller than 5 mu m and smaller than 20 mu m, and wherein a temperature dependency gamma of the photosensitive member (101) is 1

    6.
    发明专利
    未知

    公开(公告)号：DE69922895T2

    公开(公告)日：2005-12-15

    申请号：DE69922895

    申请日：1999-09-16

    Applicant: CANON KK

    Inventor： EHARA TOSHIYUKI ,  NAKAYAMA YUJI ,  KAWADA MASAYA ,  OWAKI HIRONORI

    IPC: B41J2/44 ,  G02B26/12 ,  G03G5/08

    Abstract: An electrophotographic apparatus has a light scanning device for guiding a light beam onto a rotary polygon mirror and deflecting the light beam; and a recording medium which the light beam deflected by the light scanning device scans to form an image. The recording medium is an a-Si base photosensitive member. The electrophotographic apparatus satisfies a relation represented by Eq. (I) below; where D is a diameter of the light beam at a reflecting surface of the rotary polygon mirror and W is a width in a main scanning direction of a deflecting surface of the rotary polygon mirror.

    7.
    发明专利
    未知

    公开(公告)号：DE69830975D1

    公开(公告)日：2005-09-01

    申请号：DE69830975

    申请日：1998-12-23

    Applicant: CANON KK

    Inventor： OHWAKI HIRONORI ,  YAMAZAKI KOJI ,  EHARA TOSHIYUKI ,  KAWADA MASAYA ,  KAYA TAKAAKI ,  KARAKI TETSUYA

    IPC: G01R29/12 ,  G03G15/00 ,  G03G15/04

    Abstract: In a surface potential measuring apparatus for measuring a potential configuration by moving a photosensitive body of an image forming apparatus of electrophotographic type and at least one potential sensor relative to each other and by generating dielectric current in the potential sensor due to change in potential on a surface of the photosensitive body and by analyzing the dielectric current, a width of a detecting portion of the potential sensor is smaller than a width of the change in potential to be measured, and a sectional shape of the detecting portion in a plane perpendicular to the surface of the photosensitive body and parallel to the relative movement direction does not include any edge.

    8.
    发明专利
    未知

    公开(公告)号：DE60038521T2

    公开(公告)日：2009-07-02

    申请号：DE60038521

    申请日：2000-09-05

    Applicant: CANON KK

    Inventor： EHARA TOSHIYUKI ,  KAWADA MASAYA ,  OHWAKI HIRONORI

    IPC: H04N1/29 ,  G03G5/08 ,  G03G9/08 ,  G03G15/04 ,  G03G15/043 ,  G03G15/32 ,  G03G21/00 ,  G03G21/10

    Abstract: The present invention provides an electrophotographic apparatus which has a photosensitive body, electrostatic image forming device for forming an electrostatic image on the photosensitive body, the electrostatic image forming device including exposing device for exposing the photosensitive body by a digital light in accordance with image information, and the exposing device exposing a portion that is a background for an image, and developing device for developing the electrostatic image using a developer, wherein rate throughout the developer of the contained particles having a diameter equal to or smaller than 1 mu m is 5 to 40 number%, wherein, when A denotes a one-pixel width and Wv denotes a width at a half value of a peak in an potential distribution of the electrostatic image formed by exposing the photosensitive drum using the digital light of one pixel, 0.6 ≤ Wv/A ≤ 1.0 is satisfied.

    10.
    发明专利
    未知

    公开(公告)号：DE60210525D1

    公开(公告)日：2006-05-24

    申请号：DE60210525

    申请日：2002-01-31

    Applicant: CANON KK

    Inventor： EHARA TOSHIYUKI ,  HASHIZUME JUNICHIRO ,  KAWADA MASAYA ,  KARAKI TETSUYA ,  OHWAKI HIRONORI ,  KAWAMURA KUNIMASA ,  OKAMURA RYUJI ,  HOSOI KAZUTO

    IPC: G03G5/082 ,  G03G5/08 ,  G03G5/14 ,  G03G5/147 ,  H01L21/311

    Abstract: A process for producing an electrophotographic photosensitive member comprising the steps of depositing a non-single crystal material composed basically of silicon atoms, on a cylindrical substrate in a deposition chamber, thereafter once taking the substrate with film out of the deposition chamber, then returning it to the deposition chamber, and thereafter again depositing thereon a non-single-crystal material composed basically of carbon atoms. In another embodiment, the process comprises the steps of depositing on a cylindrical substrate a photoconductive layer formed of a non-single crystal material, subjecting to surface processing the deposited film having protrusions present at its surface, and depositing on the processed surface a surface protective layer formed of a non-single-crystal material. Also disclosed is the electrophotographic photosensitive member thus obtained, and an electrophotographic apparatus having that member.

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