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    1.
    发明专利
    未知

    公开(公告)号：DE69701901D1

    公开(公告)日：2000-06-15

    申请号：DE69701901

    申请日：1997-02-07

    Applicant: SHARP KK

    Inventor： HORINAKA HAJIME ,  ONDA HIROSHI ,  YOSHIMURA HISASHI ,  KIMURA MASAHARU ,  TSURUI KOHJI

    IPC: B41J2/32 ,  B41C1/055 ,  G03G5/02 ,  G03G5/028 ,  G03G17/10

    Abstract: A photoconductive layer is formed on the entire outer peripheral surface of a light transmissive drum, and a conductive layer is formed on the photoconductive layer and is made up of a plurality of strip-like conductive portions. Provided around the drum are a tank for storing thermo-melting ink, a blade which removes surplus ink on the outer peripheral surface of the drum, a drier for drying the ink filling the gaps between the conductive portions in the conductive layers, a platen roller which presses against the outer peripheral surface of the drum with a sheet of recording paper in between, and a light source which is provided inside the drum, facing the inner peripheral surface thereof. When the light source is selectively operated in accordance with image information, current is made to flow between the conductive portions in the conductive layer via the photoconductive layer at image recording areas, thus causing the ink filling the gap to be transferred to the recording paper.

    2.
    发明专利
    未知

    公开(公告)号：DE19708016C2

    公开(公告)日：1998-09-10

    申请号：DE19708016

    申请日：1997-02-27

    Applicant: SHARP KK

    Inventor： YOSHIMURA HISASHI ,  HORINAKA HAJIME ,  KIMURA MASAHARU ,  TSURUI KOHJI ,  ONDA HIROSHI

    IPC: B41J2/015 ,  B41J2/045 ,  B41J2/055 ,  B41J2/14 ,  B41J2/205

    Abstract: An ink jet print head by which ink droplet ejected from all orifices are adapted to have uniform size has the following structure. Each of a plurality of ink chambers divided by partitions is communicated with a common pressure chamber with a first filter interposed. Common pressure chamber is communicated with a common ink feed path with a second filter interposed. Common pressure chamber and each of the ink chambers are covered by a pressure chamber ceiling. On pressure chamber ceiling, a piezo vibrator is provided at a position corresponding to common pressure chamber. A movable wall which is bent and deformed to the side increasing the volume is provided corresponding to each partition. By driving a piezo vibrator, a pressure wave is generated in common pressure chamber, which wave is transmitted to each ink chamber through the first filter. When movable wall is bent and deformed, the pressure wave is absorbed, so that an ink droplet is not ejected. When movable wall is not deformed, ink droplet is ejected because of the pressure wave.

    3.
    发明专利
    未知

    公开(公告)号：DE69523647D1

    公开(公告)日：2001-12-13

    申请号：DE69523647

    申请日：1995-02-08

    Applicant: SHARP KK

    Inventor： TSURUI KOHJI ,  KIMURA MASAHARU ,  HORINAKA HAJIME

    IPC: B41J2/045 ,  B41J2/055 ,  B41J2/14

    Abstract: An ink jet head includes an orifice plate (6) having a plurality of orifices (1) disposed transversely at prescribed intervals, a vibrating plate (3) disposed parallel to orifice plate (6) and deformed by applying a potential difference perpendicularly to the direction of polarization, and a plurality of partitions (9) disposed between orifice plate (6) and vibrating plate (3) in the space between adjacent orifices (1), and the space surrounded by orifice (1), vibrating plate (3) and partition (9) defines a pressure chamber (2) to be filled with ink. Vibrating plate (3) is provided with a groove having a rectangular cross section in a region having relatively low field intensity when signal voltage is applied. In this structure, the electric capacitance of vibrating plate (3) is reduced without adversely affecting the electric field intensity, and the efficiency of deformation of vibrating plate (3) is increased.

    4.
    发明专利
    未知

    公开(公告)号：DE69601607T2

    公开(公告)日：1999-09-16

    申请号：DE69601607

    申请日：1996-08-30

    Applicant: SHARP KK

    Inventor： YOSHIMURA HISASHI ,  IRIHARA KOUICHI ,  TSURUI KOHJI ,  KUBOTA HIROSHI ,  KOYAMA KAZUYA ,  HORINAKA HAJIME ,  KIMURA MASAHARU

    IPC: B41J2/04

    Abstract: An ink jet head (3, 103, 200, 30) includes an electroviscous fluid chamber (5) provided at a part of a sidewall of an ink chamber (21), and having electroviscous fluid (30) sealed therein, an elastic film (28) provided between the ink chamber (21) and the electroviscous fluid chamber (5) for transmitting pressure between the ink chamber (21) and the electroviscous fluid chamber (5), a pair of electrodes (26, 26A) provided at a part of a sidewall of the electroviscous fluid chamber (5) corresponding to the ink chamber (21) for applying an electric field to the electroviscous fluid (30), a pressure generation device (31, 31A, 35, 135, 201, 316) for discharging ink from the ink chamber (21), and a control device (6) for controlling ink discharge by applying a voltage to the pair of electrodes (26, 26A) to alter the viscosity of the electroviscous fluid (30) in response to record information.

    8.
    发明专利
    未知

    公开(公告)号：DE69523647T2

    公开(公告)日：2002-12-19

    申请号：DE69523647

    申请日：1995-02-08

    Applicant: SHARP KK

    Inventor： TSURUI KOHJI ,  KIMURA MASAHARU ,  HORINAKA HAJIME

    IPC: B41J2/045 ,  B41J2/055 ,  B41J2/14

    Abstract: An ink jet head includes an orifice plate (6) having a plurality of orifices (1) disposed transversely at prescribed intervals, a vibrating plate (3) disposed parallel to orifice plate (6) and deformed by applying a potential difference perpendicularly to the direction of polarization, and a plurality of partitions (9) disposed between orifice plate (6) and vibrating plate (3) in the space between adjacent orifices (1), and the space surrounded by orifice (1), vibrating plate (3) and partition (9) defines a pressure chamber (2) to be filled with ink. Vibrating plate (3) is provided with a groove having a rectangular cross section in a region having relatively low field intensity when signal voltage is applied. In this structure, the electric capacitance of vibrating plate (3) is reduced without adversely affecting the electric field intensity, and the efficiency of deformation of vibrating plate (3) is increased.

    9.
    发明专利
    未知

    公开(公告)号：DE19613649C2

    公开(公告)日：2002-11-14

    申请号：DE19613649

    申请日：1996-04-04

    Applicant: SHARP KK

    Inventor： INUI TETSUYA ,  MATOBA HIROTSUGU ,  HIRATA SUSUMU ,  ISHII YORISHIGE ,  ABE SHINGO ,  KIMURA MASAHARU ,  HORINAKA HAJIME ,  ONDA HIROSHI

    IPC: B41J2/01 ,  B41J2/05 ,  B41J2/125 ,  B41J2/175 ,  B41J2/005 ,  B41J2/195

    Abstract: An ink jet printer performs a control of a supply of electric power for each heating element based on a temperature dependency of a resistance value by monitoring its resistance value while ink is being discharged. Accordingly, the ink jet printer permits a damage of the heating element and a discharge inferior caused by a difference in characteristics in heating elements, ambient temperature, etc., to be suppressed. Additionally, as the temperature of the heating element is not detected directly, the ink jet printer permits high speed control of the electric value, thereby permitting high speed printing.

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