公开(公告)号：US20040114956A1

公开(公告)日：2004-06-17

申请号：US10319201

申请日：2002-12-13

申请人： Xerox Corporation

发明人： John S. Facci ,  Michael J. Levy ,  Paul W. Morehouse JR. ,  Rachael L. McGrath

IPC分类号： G03G015/02

CPC分类号： G03G15/0283 ,  G03G15/0291 ,  G03G2215/021

摘要： An apparatus and process for applying an electrical charge to a photoreceptor wherein a bias charge roll member is situated in contact or in close proximity with a surface of a member to be charged such as a photoreceptor. The bias charge roll member is supplied with an electrical bias having a variable voltage waveform onto which a DC bias is superimposed. The amount of DC bias is selected to set the signal voltage such that a minimally acceptable amount of AC corona is created sufficient for uniform photoreceptor charging while avoiding unnecessary excessive positive corona that causes excessive photoreceptor wear.

摘要翻译： 一种用于将电荷施加到感光体的装置和方法，其中偏置电荷辊构件位于与待充电构件的表面诸如感光体的接触或非常接近。 给偏压电荷辊构件提供具有可变电压波形的电偏压，其上叠加有DC偏压。 选择DC偏置量以设置信号电压，使得产生足够的最小可接受量的AC电晕足以使均匀的感光体充电，同时避免不必要的过度的正电晕，导致过度的感光体磨损。

公开(公告)号：US20040114955A1

公开(公告)日：2004-06-17

申请号：US10319172

申请日：2002-12-13

申请人： Xerox Corporation

发明人： John S. Facci ,  Paul W. Morehouse JR.

IPC分类号： G03G015/02

CPC分类号： G03G15/0266

摘要： An apparatus and process for applying an electrical charge to a photoreceptor wherein a bias charge roll member is situated in contact or in close proximity with a surface of member to be charged such as a photoreceptor. The bias charge roll member is supplied with an electrical bias having a rectified AC waveform onto which a DC bias is superimposed after the waveform has been rectified. The result is the ability to raise the voltage potential of the photoreceptor with less pulse voltage and, more particularly, to increase the voltage potential of the photoreceptor along as if only DC voltage were applied far above what is possible in the prior art. Among the advantages of the invention is the ability to minimize photoreceptor wear at higher levels of photoreceptor charge since the DC-offset bias enables the second Paschen threshold to be avoided for higher levels of the photoreceptor charge.

摘要翻译： 一种用于将电荷施加到感光体的装置和方法，其中偏置电荷辊构件位于与待充电构件的表面诸如感光体的接触或非常接近。 在波形整流之后，向偏置电荷辊构件提供具有整流的AC波形的电偏压，在其上叠加有DC偏压。 结果是能够以较少的脉冲电压提高感光体的电位，更具体地说，提高感光体的电位，好像只有直流电压远高于现有技术中可能的。 本发明的优点之一是在较高感光度电荷水平下使感光体磨损最小化的能力，因为直流偏移偏置使得能够避免更高水平的光感受器电荷的第二帕辛阈值。

公开(公告)号：US20030133728A1

公开(公告)日：2003-07-17

申请号：US10046149

申请日：2002-01-16

申请人： XEROX CORPORATION

发明人： Edward B. Caruthers ,  Paul W. Morehouse JR. ,  Henry R. Till

IPC分类号： G03G015/16

CPC分类号： G03G15/169 ,  G03G2215/1666

摘要： A system and method of applying a controlled amount of fluid to a moveable image carrying member of an electrographic printing system using a liquid toner before an image is transferred to a substrate. The amount of fluid applied may be controlled by a re-wet roller, located between the toner station and the transfer station, whose distance from the moveable image carrying member is varied along with the rotational speed and direction of the re-wet roller, according to either the roughness and porosity of the substrate or the print quality of the substrate. Alternatively, the fluid may be directly applied just to image areas of the moveable image carrying member to improve print quality.

摘要翻译： 一种将图像转印到基底之前，使用液体调色剂将受控量的流体施加到电子照相打印系统的可移动图像承载构件的系统和方法。 所施加的流体的量可以通过位于调色剂站和转运站之间的再湿辊来控制，所述再湿辊与可移动图像承载构件的距离随着再湿辊的旋转速度和方向而变化，根据 衬底的粗糙度和孔隙率或衬底的打印质量。 或者，可以将流体直接施加到可移动图像承载构件的图像区域以提高打印质量。