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    Closed-loop developability control in a xerographic copier or printer
    4.
    发明授权
    Closed-loop developability control in a xerographic copier or printer 失效
    静电复印机或打印机中的闭环显影控制

    公开(公告)号：US5559579A

    公开(公告)日：1996-09-24

    申请号：US315018

    申请日：1994-09-29

    申请人： Mark A. Gwaltney ,  Robert E. Grace

    发明人： Mark A. Gwaltney ,  Robert E. Grace

    IPC分类号： G03G15/00 ,  G03G15/08 ,  G03G21/00

    CPC分类号： G03G15/0855 ,  G03G15/5041 ,  G03G15/556 ,  G03G2215/00042

    摘要： A developer control for enabling the use of developer and toner materials with widely varying At in high quality xerographic copying and printing. Pixel count data is combined with toner test patch reflectance data during a brief toner rundown to determine the rate of change of density per unit change in toner concentration. During toner rundown, dispensing of toner is suspended for a period of time for effecting toner concentration reduction by approximately 0.25%. The change in Toner Concentration (TC) is estimated using pixel counting. Additionally, toner test patches are created and the reflectance thereof is measured for determining the change in toner density. The estimated TC change and the change in toner density are processed using linear regression to find the average change in density sensor output for the estimated change in TC which is referred to as the rundown slope. The rundown slope is then compared to a target value. If it exceeds the target value by more than ? (a noise factor), the dispense setpoint is reduced by one unit. If the rundown slope is less than the target value by more than ?, the dispense point is increased by one unit. The noise factor, ? is attributable to errors in pixel count or reflectance sensor drift. According to the foregoing, the nominal control line and control band in TC-Tribo space is altered to produce a much wider usable At range.

    摘要翻译： 一种显影剂控制，可以在高质量的静电复印和印刷中使用广泛变化的显影剂和调色剂材料。 像素计数数据在短暂的调色剂破碎期间与调色剂测试贴片反射率数据组合，以确定调色剂浓度每单位变化的密度变化率。 在调色剂粉碎过程中，调色剂的分配暂停一段时间，以使调色剂浓度降低约0.25％。 调色剂浓度（TC）的变化使用像素计数进行估计。 此外，产生调色剂测试贴片并测量其反射率以确定调色剂浓度的变化。 使用线性回归来处理估计的TC变化和调色剂浓度的变化，以找出被称为下降斜率的TC的估计变化的密度传感器输出的平均变化。 然后将衰落斜率与目标值进行比较。 如果超过目标值超过？ （噪声因子），分配设定点减少一个单位。 如果破碎斜率小于目标值大于α，则分配点增加一个单位。 噪音因素？ 可归因于像素计数或反射率传感器漂移的误差。 根据上述，TC-Tribo空间中的标称控制线和控制带被改变以产生更广泛的可用At范围。

    Semi-automatic image quality adjustment for multiple marking engine systems
    7.
    发明授权
    Semi-automatic image quality adjustment for multiple marking engine systems 失效
    半标记引擎系统的半自动图像质量调整

    公开(公告)号：US07162172B2

    公开(公告)日：2007-01-09

    申请号：US10999326

    申请日：2004-11-30

    申请人： Robert E. Grace ,  Michael C. Mongeon ,  Hugh W. Griffith ,  Krzysztof J. Less ,  Tim D. M. Enskat

    发明人： Robert E. Grace ,  Michael C. Mongeon ,  Hugh W. Griffith ,  Krzysztof J. Less ,  Tim D. M. Enskat

    IPC分类号： G03G15/00

    CPC分类号： G03G15/5062 ,  G03G15/0194 ,  G03G2215/00021 ,  G03G2215/00063 ,  G03G2215/00067 ,  G03G2215/0161

    摘要： Using a document scanner or other image input device of an image or document processing system to periodically scan or image printed test images from a plurality of marking engines replaces internal sensors as a feedback means in image quality control. For example, image lightness (L*) is controlled by periodically printing mid-tone test patches, scanning the printed test patches with a main job document scanner and analyzing the scanned image to determine updated marking engine actuator set points. For instance, ROS exposure and/or scorotron grid voltages are adjusted to maintain image lightness consistency between marking engines.

    摘要翻译： 使用图像或文件处理系统的文档扫描器或其他图像输入装置来周期性地扫描或图像来自多个标记引擎的打印的测试图像将内部传感器替换为图像质量控制中的反馈装置。 例如，图像亮度（L *）通过周期性地打印中间色调测试补丁来控制，用主要作业文档扫描器扫描印刷的测试补丁并分析扫描图像以确定更新的标记引擎执行器设定点。 例如，调整ROS曝光和/或烧烤栅极电压以保持标记引擎之间的图像亮度一致性。

    Electrostatographic reproduction machine having dual mode development unit control apparatus and method
    10.
    发明授权
    Electrostatographic reproduction machine having dual mode development unit control apparatus and method 有权
    具有双模显影单元控制装置和方法的静电复印机

    公开(公告)号：US6134398A

    公开(公告)日：2000-10-17

    申请号：US219730

    申请日：1998-12-22

    申请人： Robert E. Grace

    发明人： Robert E. Grace

    IPC分类号： G03G15/01 ,  G03G15/08

    CPC分类号： G03G15/0126 ,  G03G2215/0174

    摘要： A method and apparatus in an electrostatographic reproduction machine having a plurality of development units for reliably producing high quality toner particle images under varying sustained area toner coverage conditions. The apparatus employing the method includes a control system (a) for reading a stored area toner coverage level threshold value; a first operating time control algorithm and a second operating time control algorithm for adding and admixing in each development unit of the plurality of development units; (b) for measuring sustained area toner coverage levels of images being reproduced during a reproduction job; (c) for comparing the measured sustained area toner coverage levels of images being reproduced with the stored area toner coverage level threshold value; and (d) for changing the operating time control algorithm for adding and admixing in each development unit between the first operating time control algorithm and the second operating time control algorithm depending on a result of comparing the measured sustained area toner coverage levels of images being reproduced with the stored threshold value.

    摘要翻译： 一种具有多个显影单元的静电复印机中的方法和装置，用于在变化的持续区域调色剂覆盖条件下可靠地产生高质量调色剂颗粒图像。 采用该方法的装置包括用于读取存储区域调色剂覆盖度阈值的控制系统（a） 第一操作时间控制算法和用于在所述多个开发单元的每个开发单元中添加和混合的第二操作时间控制算法; （b）用于测量在再现作业期间再现的图像的持续区域调色剂覆盖度; （c）用于将所再现的图像的测量持续区域调色剂覆盖度水平与所存储的区域调色剂覆盖水平阈值进行比较; 以及（d）根据比较所测量的再现图像的持续区域调色剂覆盖度的结果，改变在第一操作时间控制算法和第二操作时间控制算法之间在每个显影单元中添加和混合的操作时间控制算法 与存储的阈值。