公开(公告)号：US07236711B2

公开(公告)日：2007-06-26

申请号：US11094454

申请日：2005-03-31

申请人： Aaron M. Burry ,  Christopher A. Dirubio ,  Gerald M. Fletcher ,  Eric S. Hamby ,  Martin Krucinski ,  Robert J. Mead ,  Bruce J. Parks ,  Peter Paul ,  Palghat S. Ramesh ,  Eliud Robles Flores ,  Fei Xiao

发明人： Aaron M. Burry ,  Christopher A. Dirubio ,  Gerald M. Fletcher ,  Eric S. Hamby ,  Martin Krucinski ,  Robert J. Mead ,  Bruce J. Parks ,  Peter Paul ,  Palghat S. Ramesh ,  Eliud Robles Flores ,  Fei Xiao

IPC分类号： G03G15/00

CPC分类号： G03G15/1645 ,  G03G15/5041 ,  G03G2215/00037 ,  G03G2215/00059

摘要： A defect analysis system for a xerographic print engine includes a residual mass sensor that senses the two-dimensional signature structure of residual mass remaining on a photoconductive or other substrate surface after image transfer. Preferably, the sensor is a full width array that spans substantially an entire width of the photoconductive surface. This information is then processed and analyzed to determine a specific type of transfer defect present. This may include the quantified level of defect for each detected type. The defect analysis system may also include a closed-loop control system that can adjust various xerographic process parameters using feedback based on the identification and optionally magnitude of each specific defect type. The identified print quality defect, such as mottle, streaks, point deletions, graininess, etc. can then be used to determine a customized corrective control action to be taken by the feedback control of the xerographic print engine to remedy or compensate for the defect(s).

摘要翻译： 用于静电印刷引擎的缺陷分析系统包括残余质量传感器，其在图像转印之后感测残留在光导或其它基底表面上的残留质量的二维签名结构。 优选地，传感器是基本上跨越光电导表面的整个宽度的全宽阵列。 然后对该信息进行处理和分析，以确定存在的特定类型的转移缺陷。 这可能包括每种检测类型的量化的缺陷水平。 缺陷分析系统还可以包括闭环控制系统，其可以使用基于每个特定缺陷类型的识别和可选大小的反馈来调整各种静电印迹过程参数。 然后可以使用所识别的打印质量缺陷，例如斑驳，条纹，点删除，颗粒度等来确定由静电印刷机的反馈控制采取的定制的校正控制动作来补救或补偿缺陷（ s）。

公开(公告)号：US07313337B2

公开(公告)日：2007-12-25

申请号：US11249699

申请日：2005-10-13

申请人： Aaron M. Burry ,  Gerald M. Fletcher ,  Eric S. Hamby ,  Peter Paul

发明人： Aaron M. Burry ,  Gerald M. Fletcher ,  Eric S. Hamby ,  Peter Paul

IPC分类号： G03G15/00

CPC分类号： G03G15/1645 ,  G03G15/5041 ,  G03G2215/00042 ,  G03G2215/1609

摘要： Disclosed is a method and apparatus for sensing residual toner mass after transfer of a xerographic image, to facilitate the identification and characterization of different types of transfer defects. The technique employed utilizes a nominal residual mass signature, measured at the start of a job, in conjunction with subsequent residual mass signature, where the calculated difference between the nominal and subsequent signatures is used to indicate transfer defects and changes in transfer efficiency.

公开(公告)号：US07403728B2

公开(公告)日：2008-07-22

申请号：US11179731

申请日：2005-07-13

申请人： Gerald M. Fletcher ,  John F. O'Brien ,  Bruce J. Parks ,  Eliud Robles-Flores ,  Alfred James Claflin ,  Jerry Floyd Adams

发明人： Gerald M. Fletcher ,  John F. O'Brien ,  Bruce J. Parks ,  Eliud Robles-Flores ,  Alfred James Claflin ,  Jerry Floyd Adams

IPC分类号： G03G15/02

CPC分类号： G03G15/0266 ,  G03G2215/027

摘要： System and methods may calibrate an AC rms voltage applied to a coronode of a charging device to achieve a predefined operating current at a target value of DC shield voltage. The target value of DC shield voltage may be set to be substantially below an over-voltage condition. System and methods may use a calibration routine that may determine a minimum AC voltage required to achieve the target value of DC shield voltage. Systems and methods may alternatively, or additionally, sense current and adjust the applied voltage to obtain a target current.

摘要翻译： 系统和方法可以校准施加到充电装置的冠状体的AC均方根电压，以在DC屏蔽电压的目标值下实现预定义的工作电流。 DC屏蔽电压的目标值可以被设置为基本上低于过电压状态。 系统和方法可以使用可以确定实现DC屏蔽电压的目标值所需的最小AC电压的校准程序。 系统和方法可以替代地或另外地感测电流并且调整所施加的电压以获得目标电流。

公开(公告)号：US06233423B1

公开(公告)日：2001-05-15

申请号：US09556449

申请日：2000-04-24

申请人： Gerald M. Fletcher ,  Christian O. Abreu ,  John T. Buzzelli ,  Palghat S. Ramesh

发明人： Gerald M. Fletcher ,  Christian O. Abreu ,  John T. Buzzelli ,  Palghat S. Ramesh

IPC分类号： G03G1516

CPC分类号： G03G15/165

摘要： A transfer charging device is arranged with dual transfer-assist blades consisting of a pressure blade and a halo blade. The pressure blade is arranged for contacting and thereby urging a substrate against an image-bearing photoreceptor. The pressure blade is formed of a relatively conductive material. The halo blade is formed of a dielectric material. The halo blade is positioned between the transfer charging device and the pressure blade to shield the pressure blade from being charged-up by the transfer charging device.

摘要翻译： 传送充电装置布置有由压力叶片和晕轮组成的双传递辅助叶片。 压力叶片布置成接触并从而将基底压向图像感光体。 压力叶片由相对导电的材料形成。 卤素叶片由电介质材料形成。 卤素叶片位于转印充电装置和压力叶片之间，以屏蔽压力叶片不被转印充电装置充电。

公开(公告)号：US20140028769A1

公开(公告)日：2014-01-30

申请号：US13557784

申请日：2012-07-25

申请人： Gerald M. Fletcher ,  Joannes N.M. de Jong ,  Peter Knausdorf ,  Steven R. Moore ,  Palghat S. Ramesh

发明人： Gerald M. Fletcher ,  Joannes N.M. de Jong ,  Peter Knausdorf ,  Steven R. Moore ,  Palghat S. Ramesh

IPC分类号： B41J2/01

CPC分类号： B41J11/06 ,  B41J2/04511 ,  B41J11/007

摘要： Embodiments described herein are directed to a system for reducing electrostatic fields underneath print heads in a direct marking printing system. The system includes: one or more print heads for depositing ink onto a media substrate; a media transport for moving the media substrate along a media path past the one or more print heads; a conductive platen contacting the media transport belt; and an electrostatic field reducer that includes an alternating current corona device positioned upstream of the one or more print heads. The media transport includes a media transport belt and, when the media substrate is on the transport belt it has an electrostatic field, which can cause printing defects. The electrostatic field reducer reduces the electrostatic field on the surface of the media substrate and thereby reduces printing defects.

摘要翻译： 本文描述的实施例涉及用于在直接标记打印系统中减少打印头下方的静电场的系统。 该系统包括：用于将墨水沉积到介质基板上的一个或多个打印头; 用于沿着介质路径移动介质基板通过所述一个或多个打印头的介质传送器; 与介质输送带接触的导电台板; 以及静电场减速器，其包括位于所述一个或多个打印头的上游的交流电晕装置。 介质输送器包括介质输送带，并且当介质基板在输送带上时，其具有静电场，这可能导致印刷缺陷。 静电场减少器减少介质基板表面的静电场，从而减少打印缺陷。

公开(公告)号：US09211736B2

公开(公告)日：2015-12-15

申请号：US13557784

申请日：2012-07-25

申请人： Gerald M. Fletcher ,  Joannes N. M. de Jong ,  Peter Knausdorf ,  Steven R. Moore ,  Palghat S. Ramesh

发明人： Gerald M. Fletcher ,  Joannes N. M. de Jong ,  Peter Knausdorf ,  Steven R. Moore ,  Palghat S. Ramesh

IPC分类号： B41J2/01 ,  B41J11/06 ,  B41J2/045 ,  B41J11/00

CPC分类号： B41J11/06 ,  B41J2/04511 ,  B41J11/007

摘要： Embodiments described herein are directed to a system for reducing electrostatic fields underneath print heads in a direct marking printing system. The system includes: one or more print heads for depositing ink onto a media substrate; a media transport for moving the media substrate along a media path past the one or more print heads; a conductive platen contacting the media transport belt; and an electrostatic field reducer that includes an alternating current corona device positioned upstream of the one or more print heads. The media transport includes a media transport belt and, when the media substrate is on the transport belt it has an electrostatic field, which can cause printing defects. The electrostatic field reducer reduces the electrostatic field on the surface of the media substrate and thereby reduces printing defects.

摘要翻译： 本文描述的实施例涉及用于在直接标记打印系统中减少打印头下方的静电场的系统。 该系统包括：用于将墨水沉积到介质基板上的一个或多个打印头; 用于沿着介质路径移动介质基板通过所述一个或多个打印头的介质传送器; 与介质输送带接触的导电台板; 以及静电场减速器，其包括位于所述一个或多个打印头的上游的交流电晕装置。 介质输送器包括介质输送带，并且当介质基板在输送带上时，其具有静电场，这可能导致印刷缺陷。 静电场减少器减少介质基板表面的静电场，从而减少打印缺陷。

公开(公告)号：US07177572B2

公开(公告)日：2007-02-13

申请号：US10875554

申请日：2004-06-25

申请人： Christopher A. DiRubio ,  Michael D. Thompson ,  Gerald M. Fletcher ,  Charles A. Radulski

发明人： Christopher A. DiRubio ,  Michael D. Thompson ,  Gerald M. Fletcher ,  Charles A. Radulski

IPC分类号： G03G15/02

CPC分类号： G03G15/0233 ,  G03G15/0283 ,  G03G2215/021

摘要： Electrodes are embedded in a biased charge roller of a xerographic device. The electrodes, which may run the length of the roller, are deposited on an insulating substrate. A semi-conductive conformable layer of a flexible elastomer covers the electrodes. The semi-conductive conformable layer limits current flow between electrodes and relaxes charge deposited on the roller surface. Stationary pre-nip and post-nip contacts apply the bias to the imbedded electrodes. The electrodes in the post nip region are biased to VPOST. The electrodes positioned in the pre-nip regions are either grounded or biased to VPRE

摘要翻译： 电极嵌入静电复印装置的偏置充电辊中。 可以延伸辊的长度的电极沉积在绝缘基板上。 柔性弹性体的半导电适形层覆盖电极。 半导电适形层限制电极之间的电流流动，并放松沉积在辊表面上的电荷。 固定的预压区和后压区触点将偏置施加到嵌入的电极上。 柱压区中的电极被偏压到V POST。 位于预压区中的电极接地或偏压到V POST。 电镀偏压充电辊可能在后压区中产生空气击穿，导致高度均匀的充电。

公开(公告)号：US06606477B2

公开(公告)日：2003-08-12

申请号：US09683538

申请日：2002-01-16

申请人： Michael D. Thompson ,  Christopher A. DiRubio ,  Gerald M. Fletcher ,  Charles A. Radulski

发明人： Michael D. Thompson ,  Christopher A. DiRubio ,  Gerald M. Fletcher ,  Charles A. Radulski

IPC分类号： G03G1516

CPC分类号： G03G15/1685

摘要： Electrodes are embedded in a biased transfer roller for the transfer of a xerographic image. The electrodes, which run the length of the roller, are deposited on an insulating core surrounding the shaft. A conformable semi-conductive layer of a flexible elastomer covers the embedded electrodes. The semi-conductive layer limits current flow between embedded electrodes, relaxes charge deposited on the roller surface, and maximizes the electric field that attracts the toner from the photoconductor to the image receiving surface (substrate or intermediate). The electroded biased transfer roller may tailor the electric fields within the nip, pre-nip, and post-nip regions between the photoreceptor and the image receiving surface of the xerographic device.

摘要翻译： 电极嵌入偏置的转印辊中，用于转印静电复印图像。 延伸辊长度的电极沉积在围绕轴的绝缘芯上。 柔性弹性体的适形的半导体层覆盖嵌入的电极。 半导体层限制了嵌入电极之间的电流流动，使得沉积在辊表面上的电荷松弛，并且使得将调色剂从光电导体吸引到图像接收表面（衬底或中间体）的电场最大化。 电极偏转转印辊可以定制感光体和静电复印设备的图像接收表面之间的辊隙，预压区和压区之间的电场。

公开(公告)号：US07242894B2

公开(公告)日：2007-07-10

申请号：US10989085

申请日：2004-11-15

申请人： Youti Kuo ,  Robert A. Gross ,  David K. Ahl ,  Douglas A. McKeown ,  Mark Stevens ,  Gerald M. Fletcher ,  Christopher A. DiRubio

发明人： Youti Kuo ,  Robert A. Gross ,  David K. Ahl ,  Douglas A. McKeown ,  Mark Stevens ,  Gerald M. Fletcher ,  Christopher A. DiRubio

IPC分类号： G03G15/20

CPC分类号： G03G15/167 ,  G03G2215/1623

摘要： An electrostatographic printing apparatus comprises a charge receptor, and a transfer station for transferring a toner image from the charge receptor to a sheet. The sheet passes through a nip formed between the charge receptor and a moving transfer belt. Upstream of the nip, the belt forms a shallow angle relative to the charge receptor; downstream of the nip, the belt forms a steep angle relative to the charge receptor. This configuration enables self-stripping of the sheet from the transfer belt at the exit of the nip.

摘要翻译： 静电印刷装置包括电荷接收器和用于将调色剂图像从电荷接收器转印到片材的转印站。 片材通过形成在电荷接收器和移动转印带之间的辊隙。 在辊隙的上游，带相对于电荷受体形成较浅的角度; 在辊隙的下游，带相对于电荷受体形成陡峭的角度。 这种构造使得能够在辊隙的出口处从转印带自动剥离片材。

公开(公告)号：US07072599B2

公开(公告)日：2006-07-04

申请号：US10989086

申请日：2004-11-15

申请人： Christopher A. DiRubio ,  Gerald M. Fletcher ,  Michael F. Zona ,  Rachael L. McGrath ,  Bruce E. Thayer

发明人： Christopher A. DiRubio ,  Gerald M. Fletcher ,  Michael F. Zona ,  Rachael L. McGrath ,  Bruce E. Thayer

IPC分类号： G03G15/16

CPC分类号： G03G15/168

摘要： An electrostatographic printing apparatus comprises a charge receptor, and a transfer station for transferring a toner image from the charge receptor to a sheet by providing an electric field of predetermined magnitude at a transfer zone. The transfer station includes a rotatable transfer member, with a cleaning corotron associated therewith. A control system for maintaining a constant current at the transfer zone takes into account a current supplied by the cleaning corotron. The control system can also take into account current leakages associated with the transfer member.

摘要翻译： 静电印刷装置包括电荷接收器和用于通过在转印区域提供预定幅度的电场将调色剂图像从电荷受体转印到片材的转印站。 转运站包括可旋转的转移构件，其具有与其相关联的清洁corotron。 用于在转移区域保持恒定电流的控制系统考虑由清洁电晕管提供的电流。 控制系统还可以考虑与传送构件相关联的当前泄漏。