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    • 3. 发明授权
    • Method for solid area process control for scavengeless development in a
xerographic apparatus
    • 在静电复印设备中用于无清除发展的固体区域过程控制的方法
    • US5521677A
    • 1996-05-28
    • US497834
    • 1995-07-03
    • Grace T. BrewingtonRichard P. Germain
    • Grace T. BrewingtonRichard P. Germain
    • G03G15/06G03G15/00G03G15/08
    • G03G15/0808G03G15/5041G03G2215/00042G03G2215/0643
    • A solid area process control for scavengeless development using a transport roll-to-donor roll DC bias as a control parameter in an electrophotographic printing machine is disclosed. The process develops a latent image of a solid area toner patch on a photoconductive belt. Once the patch is developed, the patch is measured with an infrared reflectance type sensor. The measured development mass is compared to a target value stored in the machine memory. A test of the comparison is performed by the process. If the result of the test is less than the target value, the transport roll-to-donor roll bias is increased and the process ends. If the result is more than the target value, the transport roll-to-donor roll bias is decreased and the process ends, otherwise the process stops because the measured development is acceptable. The process is run at predetermined intervals to maintain constant output from the electrophotographic printing machine.
    • 公开了一种使用传送辊到供体辊直流偏压作为电子照相印刷机中的控制参数的无清除显影的固体区域过程控制。 该方法在感光带上形成固体区域调色剂贴片的潜像。 一旦贴片开发,贴片就用红外反射型传感器测量。 将测量的显影质量与存储在机器存储器中的目标值进行比较。 通过该过程进行比较的测试。 如果测试结果小于目标值,则传送辊到供体辊倾斜度增加,并且处理结束。 如果结果大于目标值,则输送辊到供体辊倾斜度减小,并且处理结束,否则由于测量的显影是可接受的,否则该过程停止。 该过程以预定间隔运行以保持来自电子照相印刷机的恒定输出。
    • 8. 发明授权
    • Biasing scheme for improving latitudes in the tri-level xerographic
process
    • 改善三级静电复印过程纬度的偏置方案
    • US5080988A
    • 1992-01-14
    • US440913
    • 1989-11-22
    • Richard P. GermainJames E. Williams
    • Richard P. GermainJames E. Williams
    • G03G13/01G03G15/01G03G15/06G03G15/08
    • G03G13/013G03G15/0121
    • The operating latitude of the tri-level xerographic process is improved by replacing the standard DC bias that is applied to one or both of the developer housings in conventional tri-level imaging with a chopped DC (CDC) developer bias. Chopped DC biasing is the alternate application of two discrete bias voltages to a developer stucture in a periodic fashion at a given frequency, with the period of each cycle divided up between the two bias levels at a duty cycle of from 5%-10% or 90%-95% depending upon which of the two developer structures is being biased. In the case of the DAD developer structure the duty cycle of higher of the two biases is 5%-10% and in case of a CAD developer structure the duty cycle of higher of the two biases is 90%-95%.
    • 通过用切断的DC(CDC)显影剂偏压替代在常规三电平成像中施加到一个或两个显影剂外壳的标准DC偏压来改善三级静电印迹工艺的操作纬度。 切断的直流偏置是以给定频率以周期性方式对显影剂结构的两个离散偏置电压的替代应用,每个周期的周期在两个偏置电平之间以5%-10%的占空比分开,或 90%-95%取决于两个显影剂结构中的哪一个被偏置。 在DAD开发者结构中,两个偏差中较高的占空比为5%-10%,而在CAD开发者结构的情况下,两个偏差较高的占空比为90%-95%。