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    2.
    发明专利
    未知

    公开(公告)号：DE69509037T2

    公开(公告)日：1999-10-28

    申请号：DE69509037

    申请日：1995-09-28

    Applicant: SHARP KK

    Inventor： UEDA ATSUSHI

    IPC: G03G15/05 ,  G03G15/08 ,  G03G15/34

    Abstract: A developing device has a brush-like toner carrying roller for carrying charged toner and a toner supply roller which is in contact with the toner carrying roller and charges the toner by friction, and applies a voltage having the same polarity as the charging polarity of the toner to the toner supply roller. With this arrangement, since the charged toner and the toner supply roller produce repulsion therebetween, it is possible to carry a sufficient amount of toner on the surface of the toner carrying roller. Therefore, even when the electric field strength is weak, it is possible to cause a sufficient amount of toner to fly from the surface of the toner carrying roller. Consequently, a quality image can be stably produced with an inexpensive small-size structure. Moreover, by moving the toner carrying roller to a position where it comes into contact with a grid electrode and cleaning the grid electrode with the rotating toner carrying roller, it is possible to prevent a lowering of the image quality due to adhesion of the toner to the grid electrode.

    4.
    发明专利
    未知

    公开(公告)号：DE69417788T2

    公开(公告)日：1999-10-21

    申请号：DE69417788

    申请日：1994-02-24

    Applicant: SHARP KK

    Inventor： TAKAI YASUHIRO ,  UEDA ATSUSHI ,  TANAKA HIROKAZU ,  YAMASA HIDEO

    IPC: G03G15/08

    Abstract: A developer device is provided with a developer vessel for storing therein a developer material composed of toner particles and carrier granules. In the developer device, a target ratio of toner particles for a detected quantity of the developer material is computed. In the device, a toner concentration detector sensor is also provided for detecting the ratio of toner particles in the developer vessel. In order to set the detected toner ratio of toner particles equal to the target ratio, quantity of toner particles to be additionally supplied to the developer vessel is controlled. As a result, the ratio of toner particles to the developer material stored in the developer vessel can be maintained in a predetermined ratio, thereby ensuring a desirable image quality.

    6.
    发明专利
    未知

    公开(公告)号：DE69509037D1

    公开(公告)日：1999-05-20

    申请号：DE69509037

    申请日：1995-09-28

    Applicant: SHARP KK

    Inventor： UEDA ATSUSHI

    IPC: G03G15/05 ,  G03G15/08 ,  G03G15/34

    Abstract: A developing device has a brush-like toner carrying roller for carrying charged toner and a toner supply roller which is in contact with the toner carrying roller and charges the toner by friction, and applies a voltage having the same polarity as the charging polarity of the toner to the toner supply roller. With this arrangement, since the charged toner and the toner supply roller produce repulsion therebetween, it is possible to carry a sufficient amount of toner on the surface of the toner carrying roller. Therefore, even when the electric field strength is weak, it is possible to cause a sufficient amount of toner to fly from the surface of the toner carrying roller. Consequently, a quality image can be stably produced with an inexpensive small-size structure. Moreover, by moving the toner carrying roller to a position where it comes into contact with a grid electrode and cleaning the grid electrode with the rotating toner carrying roller, it is possible to prevent a lowering of the image quality due to adhesion of the toner to the grid electrode.

    7.
    发明专利
    未知

    公开(公告)号：DE69417788D1

    公开(公告)日：1999-05-20

    申请号：DE69417788

    申请日：1994-02-24

    Applicant: SHARP KK

    Inventor： TAKAI YASUHIRO ,  UEDA ATSUSHI ,  TANAKA HIROKAZU ,  YAMASA HIDEO

    IPC: G03G15/08

    Abstract: A developer device is provided with a developer vessel for storing therein a developer material composed of toner particles and carrier granules. In the developer device, a target ratio of toner particles for a detected quantity of the developer material is computed. In the device, a toner concentration detector sensor is also provided for detecting the ratio of toner particles in the developer vessel. In order to set the detected toner ratio of toner particles equal to the target ratio, quantity of toner particles to be additionally supplied to the developer vessel is controlled. As a result, the ratio of toner particles to the developer material stored in the developer vessel can be maintained in a predetermined ratio, thereby ensuring a desirable image quality.

    8.
    发明专利
    未知

    公开(公告)号：DE69419548T2

    公开(公告)日：2000-02-03

    申请号：DE69419548

    申请日：1994-03-08

    Applicant: SHARP KK

    Inventor： UEDA ATSUSHI ,  TAKAI YASUHIRO ,  TANAKA HIROKAZU ,  YAMASA HIDEO ,  IRIHARA KOUICHI

    IPC: G03G15/08

    Abstract: A developing device is provided with a developer vessel for storing therein a developer material composed of toner particles and carrier granules and a developer material supply section for gradually supplying a carrier developer including the carrier granules from above the developer vessel, wherein a discharge opening for discharging therethrough the developer material is formed on a side face of the developer vessel. When a tilt detection unit provided with the developing device detects the tilt of the developing device, an alarm lamp is set ON for sending a warning. In the meantime, the discharge opening is closed for preventing an excessive overflow of the developer material from the developer vessel.

    9.
    发明专利
    未知

    公开(公告)号：DE69419548D1

    公开(公告)日：1999-08-26

    申请号：DE69419548

    申请日：1994-03-08

    Applicant: SHARP KK

    Inventor： UEDA ATSUSHI ,  TAKAI YASUHIRO ,  TANAKA HIROKAZU ,  YAMASA HIDEO ,  IRIHARA KOUICHI

    IPC: G03G15/08

    Abstract: A developing device is provided with a developer vessel for storing therein a developer material composed of toner particles and carrier granules and a developer material supply section for gradually supplying a carrier developer including the carrier granules from above the developer vessel, wherein a discharge opening for discharging therethrough the developer material is formed on a side face of the developer vessel. When a tilt detection unit provided with the developing device detects the tilt of the developing device, an alarm lamp is set ON for sending a warning. In the meantime, the discharge opening is closed for preventing an excessive overflow of the developer material from the developer vessel.

    IMAGE FORMATION DEVICE
    10.
    发明专利
    IMAGE FORMATION DEVICE 审中-公开

    公开(公告)号：JP2004009331A

    公开(公告)日：2004-01-15

    申请号：JP2002161970

    申请日：2002-06-03

    Applicant: SHARP KK

    Inventor： UEDA ATSUSHI ,  NARISEI TAKAHISA ,  NAKANO KUNIAKI ,  KIMURA MASAHARU ,  IEMURA HIROTOSHI

    IPC: B41J2/01 ,  B41J13/00 ,  B41J13/02

    Abstract: PROBLEM TO BE SOLVED: To provide an image formation device which can effectively prevent a sheet from lifting. SOLUTION: The image formation device includes a plurality of recording heads 24a and 24b for discharging ink and a sheet pressing member 28 for suppressing the lift of the sheet being carried. The sheet pressing member 28 is provided between the plurality of recording heads 24a and 24b and at a position closer than a distance between the sheet and the heads 24a and 24b. Thus, the lift of the sheet can be effectively suppressed, and degradation in image forming quality, the heads 24a and 24b is prevented from being stained with contaminants, and a nozzle can be prevented from being clogged with the contaminants. COPYRIGHT: (C)2004,JPO

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