Color image forming apparatus with positional deviation detecting
pattern and method therefor
    71.
    发明授权
    Color image forming apparatus with positional deviation detecting pattern and method therefor 失效
    具有位置偏差检测图案的彩色图像形成装置及其方法

    公开(公告)号:US5867759A

    公开(公告)日:1999-02-02

    申请号:US909705

    申请日:1997-08-08

    IPC分类号: G03G15/01 H04N1/50

    CPC分类号: H04N1/506 G03G15/0194

    摘要: A color image forming apparatus for superimposing images formed on a plurality of photoconductive elements onto a copy sheet includes a sensor for reading a transfer member and a positional deviation detecting pattern formed on the transfer member, a memory for storing information relating to an area having no roughness, such as a scar, on the transfer member, a detector for detecting the area having no roughness on the basis of a signal read by the sensor and for causing the memory to store the information relating to the area, and a color deviation corrector for correcting color deviation on the basis of the signal generated by the sensor reading the positional deviation detecting pattern. The positional deviation detecting pattern is formed at an area of the transfer member having no roughness.

    摘要翻译: 一种用于将形成在多个光电导元件上的图像叠加到复印纸上的彩色图像形成装置包括用于读取转印部件的传感器和形成在转印部件上的位置偏差检测图案,存储器,用于存储与没有 基于传感器读取的信号检测出不粗糙区域的检测器,以及使存储器存储与该区域有关的信息的检测器,以及颜色偏差校正器 用于基于读取位置偏差检测图案的传感器产生的信号来校正颜色偏差。 位置偏差检测图案形成在转印部件的没有粗糙度的区域。

    Liquid discharge apparatus and liquid discharge method

    公开(公告)号:US10919293B2

    公开(公告)日:2021-02-16

    申请号:US16526132

    申请日:2019-07-30

    IPC分类号: B41J2/045 B41J2/15 B41J2/165

    摘要: A liquid discharge apparatus includes a liquid discharge head, a scanning device, a conveyance device, a reading device, control circuitry, and a detecting device. The liquid discharge head is configured to discharge liquid to a target object. The scanning device is configured to move the liquid discharge head in a main scanning direction. The conveyance device is configured to convey the target object in a direction perpendicular to the main scanning direction. The reading device is disposed at a predetermined position with respect to the liquid discharge head. The control circuitry is configured to change a detection pattern image for detecting a defective nozzle, in accordance with a feed amount of the target object in the sub-scanning direction. The detecting device is configured to identify a nozzle corresponding to a defective portion of the detection pattern image read by the reading device.

    OPTICAL SENSOR DEVICE, COLORIMETRIC DEVICE, AND IMAGE FORMING APPARATUS

    公开(公告)号:US20190294935A1

    公开(公告)日:2019-09-26

    申请号:US16356624

    申请日:2019-03-18

    摘要: An optical sensor device includes a first light source, a second light source, a sensor, and control circuitry. The first light source has a plurality of peak wavelengths in a wavelength range of 400 nm to 780 nm. The second light source emits ultraviolet light. The control circuitry adjusts a light amount of the first light source based on an output of the sensor in a state the first light source is on and the second light source is off, adjusts a light amount of the second light source based on an output of the sensor in a state the second light source is on and the first light source is off, and acquires a correction value of data output by the sensor, based on an output of the sensor in a state each of the first and second light sources is on with the light amount adjusted.

    IMAGE FORMING APPARATUS, RECORDING MEDIUM CONVEYING METHOD, AND RECORDING MEDIUM

    公开(公告)号:US20190283469A1

    公开(公告)日:2019-09-19

    申请号:US16294613

    申请日:2019-03-06

    IPC分类号: B41J13/00 B41J2/21

    摘要: An image forming apparatus includes a conveyance device to convey a recording medium in a first direction and a second direction opposite the first direction; an image forming device; an imaging device; and circuitry to control the image forming apparatus. Controlled by the circuitry, the image forming device forms the colorimetric pattern on the recording medium that has been conveyed in the first direction by a predetermined distance after the marker pattern is formed. Controlled by the circuitry, after the colorimetric pattern is fixed, the circuitry causes the conveyance device to convey the recording medium in the second direction by an amount equivalent to a distance from the marker pattern to an imaging position by the imaging device plus a margin, conveys the recording medium in the first direction until the imaging device detects the marker pattern, and conveys the recording medium in the first direction to a colorimetry position.

    Image capturing device, color measuring device, color measuring system, and image forming apparatus
    78.
    发明授权
    Image capturing device, color measuring device, color measuring system, and image forming apparatus 有权
    图像捕获装置,色彩测量装置,彩色测量系统和图像形成装置

    公开(公告)号:US08922831B2

    公开(公告)日:2014-12-30

    申请号:US13852371

    申请日:2013-03-28

    摘要: An image capturing device includes an image capturing unit, a moving unit, a detector, and a determiner. The image capturing unit includes an optical transmission member; and a sensor capturing an image of the subject via the optical transmission member. The moving unit moves the image capturing unit in an optical axis direction of the sensor. The detector detects a contamination from first and second images. The first and second images are captured by the sensor when the image capturing unit is located at first and second positions in the optical axis direction, respectively. The second position is spaced away from the subject than the first position in the optical axis direction. The determiner determines that a contamination is deposited on the optical transmission member when a difference in the number of pixels in which a contamination is detected between the first and second images is less than a threshold.

    摘要翻译: 图像捕获装置包括图像捕获单元,移动单元,检测器和确定器。 图像捕获单元包括光传输部件; 以及经由光传输部件拍摄被检者的图像的传感器。 移动单元沿着传感器的光轴方向移动图像捕获单元。 检测器检测第一和第二图像的污染。 当图像拍摄单元分别位于光轴方向上的第一和第二位置时,传感器捕获第一和第二图像。 与光轴方向上的第一位置相比,第二位置与被摄体隔开。 当在第一和第二图像之间检测到污染物的像素数量的差异小于阈值时,确定器确定污染物沉积在光传输部件上。

    Roll sheet conveyance device and image forming apparatus incorporating same
    79.
    发明申请
    Roll sheet conveyance device and image forming apparatus incorporating same 审中-公开
    卷片输送装置及其结合的图像形成装置

    公开(公告)号:US20090121423A1

    公开(公告)日:2009-05-14

    申请号:US12292226

    申请日:2008-11-14

    IPC分类号: B65H7/00

    摘要: An image forming apparatus includes an image forming device forming an image on a recording medium wound into a roll, and a roll sheet conveyance device unwinding and conveying the medium to the image forming device. The roll sheet conveyance device includes a roll sheet feed device, a torsion detector, and a control device. The roll sheet feed device includes a drive device including upstream and downstream shafts in a drive transmission direction to rotate the medium, and a feed device to feed the medium. The detection device includes a torsion coil spring provided between the upstream and downstream shafts, and a pair of an encoder and an encoder sensor detecting the torsion amount at the opposite ends of the torsion coil spring. The control device controls the torsion amount on the basis of a signal from the detection device, and applies a given back tension to the medium.

    摘要翻译: 图像形成装置包括在卷绕在卷筒上的记录介质上形成图像的图像形成装置,以及将介质退绕并传送到图像形成装置的卷纸输送装置。 卷片输送装置包括卷片输送装置,扭力检测器和控制装置。 卷纸输送装置包括驱动装置,该驱动装置包括驱动传递方向的上游和下游轴以旋转介质,以及馈送装置以馈送介质。 检测装置包括设置在上游轴和下游轴之间的扭力螺旋弹簧,以及一对编码器和编码器传感器,用于检测扭转螺旋弹簧的两端的扭转量。 控制装置根据来自检测装置的信号来控制扭转量,并向介质施加给定的背张力。