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    METHOD FOR REDUCING SECONDARY SATELLITES IN INK JET PRINTING
    62.
    发明公开
    METHOD FOR REDUCING SECONDARY SATELLITES IN INK JET PRINTING 审中-公开

    公开(公告)号：EP3626455A1

    公开(公告)日：2020-03-25

    申请号：EP18195808.3

    申请日：2018-09-20

    申请人： Canon Production Printing Holding B.V.

    发明人： FRATERS, Arjan B. ,  VAN DEN BERG, Marcus J.

    IPC分类号： B41J2/045

    摘要： A method for driving a droplet jetting element comprising a piezo electric actuator in connection with a liquid chamber ending in a nozzle is disclosed. The piezo electric actuator is capable of shaping a volume of the liquid chamber upon application of an electric voltage to the electrodes of the actuator. The method comprises the steps of: filling the liquid chamber with a liquid that is capable of being ejected in droplets from the nozzle and applying a driving waveform to the piezo electric actuator, wherein the driving waveform comprises a first part for discharging a droplet from the nozzle, shortly followed by a second part for preventing a primary satellite droplet, wherein the second part comprises a variable retention timing to reduce an amount of liquid in a secondary satellite droplet.

    IMAGE-FORMING DEVICE AND METHOD OF OPERATION THEREOF
    68.
    发明公开
    IMAGE-FORMING DEVICE AND METHOD OF OPERATION THEREOF 审中-公开

    公开(公告)号：EP4357145A1

    公开(公告)日：2024-04-24

    申请号：EP22201944.0

    申请日：2022-10-17

    申请人： Canon Production Printing Holding B.V.

    发明人： VAN BEKKEM, Johannes M.

    IPC分类号： B41J2/21

    CPC分类号： B41J2/2135 ,  G06K15/027

    摘要： The present invention relates to a method for calibrating an image forming device (100; 200) comprising at least one printhead (2) comprising a plurality of nozzles (21) arranged in a plurality of nozzle rows (a1-a8), the image forming device comprises a sensor unit (1) configured to read information from a recording medium (500) on a working area (6). The method enables determination of misalignment of the sensor unit by analyzing a printed reference image without the need of external reference markers. The invention also relates to a corresponding image forming device.