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    Ink jet printing apparatus and ejection recovery method for printing head
    31.
    发明申请
    Ink jet printing apparatus and ejection recovery method for printing head 失效
    喷墨打印设备和打印头的喷射恢复方法

    公开(公告)号：US20040207683A1

    公开(公告)日：2004-10-21

    申请号：US10670189

    申请日：2003-09-26

    Applicant: CANON FINETECH INC.

    Inventor： Yoichi Sonobe

    IPC: B41J002/165

    CPC classification number: B41J2/165 ,  B41J2/16579

    Abstract: An example conventional method of avoiding a printing failure caused by residual bubbles in a print head involves counting from an initiation of a printing operation the accumulated number of print dots formed by the entire print head and, when the count value reaches a predetermined value, executing a recovery operation. Such a conventional method, however, requires the recovery operation to be performed frequently for the following reason. The recovery operation initiation condition has been determined by performing printing operations under a variety of conditions that cause printing failures and which change depending on the liquid chamber structure in the print head and an image pattern being printed, and then selecting a threshold value for the worst condition. To solve this problem, the nozzles in the long print head are divided into a plurality of blocks, the accumulated number of print dots is counted for each block, the count value multiplied by a weighting value, which is determined according to the position of the block, is compared with a predetermined threshold, and, when at least one of the weighted count values exceeds the predetermined threshold, the recovery operation is executed.

    Abstract translation: 避免由打印头中的残留气泡引起的打印故障的一个常规方法涉及从打印操作的开始计数由整个打印头形成的累积打印点数，并且当计数值达到预定值时，执行 恢复操作。 然而，这样的常规方法需要频繁执行恢复操作，原因如下。 通过在导致打印故障的各种条件下执行打印操作以及根据打印头中的液体室结构和正在打印的图像图案的变化，然后选择最差的阈值来确定恢复操作启动条件 条件。 为了解决这个问题，长打印头中的喷嘴被分成多个块，对于每个块计数累计打印点数，计数值乘以加权值，该加权值根据 块与预定阈值进行比较，并且当加权计数值中的至少一个超过预定阈值时，执行恢复操作。

    Sheet cutting apparatus, and sheet processing apparatus and image forming apparatus having the sheet cutting apparatus
    32.
    发明申请
    Sheet cutting apparatus, and sheet processing apparatus and image forming apparatus having the sheet cutting apparatus 审中-公开
    片材切割装置和具有片材切割装置的片材处理装置和成像装置

    公开(公告)号：US20040096253A1

    公开(公告)日：2004-05-20

    申请号：US10667325

    申请日：2003-09-23

    Applicant: CANON FINETECH INC.

    Inventor： Yuji Ueno ,  Hiroki Honmochi ,  Ken Yonekawa

    IPC: G03G015/00 ,  B26D007/06

    CPC classification number: B26D5/20 ,  B26D7/18 ,  B26D7/20 ,  B26D7/28 ,  B26D2007/202 ,  Y10T83/202 ,  Y10T83/647 ,  Y10T83/8835 ,  Y10T83/8868

    Abstract: The present invention relates to a sheet cutting apparatus comprising cutting means for cutting a sheet bundle, receiving means for receiving the cutting means, receiving position moving means for moving a receiving position on the receiving means for receiving the cutting means; and counting means for counting a number of cutting times of the sheet bundles. The receiving position moving means moves the receiving position on the receiving means according to information out of the counting means.

    Abstract translation: 本发明涉及一种片材切割装置，包括用于切割片材摞的切割装置，用于接收切割装置的接收装置，用于移动用于接收切割装置的接收装置上的接收位置的接收位置移动装置; 以及用于计数片材束的多次切割时间的计数装置。 接收位置移动装置根据计数装置中的信息移动接收装置上的接收位置。

    Image forming apparatus which sets voltage range for charging an image bearing member
    34.
    发明授权
    Image forming apparatus which sets voltage range for charging an image bearing member 有权

    公开(公告)号：US10078287B2

    公开(公告)日：2018-09-18

    申请号：US15109379

    申请日：2015-12-02

    Applicant: CANON FINETECH INC.

    Inventor： Yuki Nagahashi

    IPC: G03G15/02

    CPC classification number: G03G15/0266 ,  G03G15/0283

    Abstract: Provided is an image forming apparatus capable of appropriately setting a range of a charging voltage for electrically charging an image bearing member. A charging roller (2) and a charging power source (S1) are configured to apply a voltage between the charging roller (2) and a photosensitive drum (1) to electrically charge the photosensitive drum (1). A control circuit (13) is configured to set a voltage for obtaining a predetermined discharge current by the charging roller (2) with the photosensitive drum (1). The control circuit (13) is configured to determine, depending on a state of a resistance acting on an electric current flowing between the charging roller (2) and the photosensitive drum (1), at least one of an upper limit or a lower limit of the voltage set by the control circuit (13).

    Inkjet printing apparatus and method for controlling inkjet printing apparatus
    37.
    发明授权
    Inkjet printing apparatus and method for controlling inkjet printing apparatus 有权

    公开(公告)号：US09827766B2

    公开(公告)日：2017-11-28

    申请号：US15227912

    申请日：2016-08-03

    Applicant: CANON FINETECH INC.

    Inventor： Hideyuki Ito

    IPC: B41J2/165

    CPC classification number: B41J2/16508 ,  B41J2/16505 ,  B41J2/16517 ,  B41J2/16526 ,  B41J2002/16573

    Abstract: There is provided an inkjet printing apparatus capable of performing a printing operation to eject ink from an ejection port provided for a print head to a print medium while covering the ejection port with a capping portion in a standby state in which the printing operation is not performed, the apparatus including: a humidifying unit configured to perform a humidification operation to humidify a space formed between the capping portion and the print head in the standby state; and a control unit configured to cause the humidifying unit to perform the humidification operation on the space in the standby state, wherein the control unit suspends the humidification operation at a predetermined timing after performing the humidification operation multiple times.

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