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：US20130335752A1

公开(公告)日：2013-12-19

申请号：US13523358

申请日：2012-06-14

申请人： Bruce E. Thayer ,  Bin Zhang ,  Palghat S. Ramesh ,  Rachael L. McGrath ,  Christopher A. DiRubio

发明人： Bruce E. Thayer ,  Bin Zhang ,  Palghat S. Ramesh ,  Rachael L. McGrath ,  Christopher A. DiRubio

IPC分类号： G06K15/02

CPC分类号： B41J2/0057

摘要： An indirect printer includes a system for alternating the pressure in a transfer nip by manipulating the transfer roller. The system includes a pair of pivotable collars mounted about the ends of the transfer roller. The collars are pivoted towards or away from one another to bend the transfer roller and to increase or decrease, respectively, the pressure in the longitudinal center of the nip.

摘要翻译： 间接打印机包括通过操纵转印辊来交替转印压区中的压力的​​系统。 该系统包括围绕转印辊的端部安装的一对可枢转的套环。 套环朝向或远离彼此枢转以弯曲转印辊并分别增加或减小辊隙纵向中心的压力。

公开(公告)号：US20130335473A1

公开(公告)日：2013-12-19

申请号：US13495452

申请日：2012-06-13

申请人： Palghat S. Ramesh ,  Bruce E. Thayer ,  Rachael L. McGrath

发明人： Palghat S. Ramesh ,  Bruce E. Thayer ,  Rachael L. McGrath

IPC分类号： B41J2/205

CPC分类号： B41J2/21

摘要： An inkjet printer includes a plurality of color separation modules. Each color separation module includes an image receiving member and a printhead module configured to eject ink drops onto the image receiving member to form a color separation on the image receiving member. The printer is configured to transfix each color separation on each image receiving member to a single sheet to produce a composite ink image on the print medium after the print medium has passed by all of the color separation modules in the printer.

摘要翻译： 喷墨打印机包括多个分色模块。 每个分色模块包括图像接收构件和打印头模块，该打印头模块被配置为将墨滴喷射到图像接收构件上，以在图像接收构件上形成分色。 打印机被配置为将每个图像接收构件上的每个颜色分离转换成单张纸，以在打印介质已经通过打印机中的所有颜色分离模块之后在打印介质上产生复合油墨图像。

公开(公告)号：US08005390B2

公开(公告)日：2011-08-23

申请号：US12250591

申请日：2008-10-15

申请人： Palghat S. Ramesh ,  Joseph Sheflin ,  Jack LeStrange ,  Peter Paul ,  Aaron M. Burry

发明人： Palghat S. Ramesh ,  Joseph Sheflin ,  Jack LeStrange ,  Peter Paul ,  Aaron M. Burry

IPC分类号： G03G15/00 ,  G03G15/02

CPC分类号： G03G15/5041

摘要： A method creates a printing image charge on a photoreceptor printing region of a photoreceptor within a printing apparatus and, simultaneously with the creating of the printing image charge, charges source patches on the photoreceptor outside the photoreceptor printing region. The method then transfers developer material from a donor roll to the photoreceptor. The source patches cause developer material to be removed from areas of the donor roll outside a donor roll printing region to create developer material-depleted regions. The method then reloads the donor roll with developer material using a magnetic brush and evaluates a reload function of the donor roll by characteristics of developer material on target patches with developer material in areas of the non-printing region of the photoreceptor adjacent the target patches. The method then alters the printing image charge to maintain the reload function within a predetermined range.

摘要翻译： 一种方法在印刷装置内的感光体的感光体印刷区域上产生印刷图像电荷，并且与印刷图像电荷的产生同时，在感光体打印区域外的感光体上对源极贴片充电。 该方法然后将显影剂材料从供体辊转移到感光体。 源贴片使得显影剂材料从供体辊印刷区域外的供体辊的区域移除，以产生显影剂材料耗尽区域。 然后，该方法使用磁刷将显影剂材料重新加载供体辊，并通过显影剂材料在邻近目标贴片的感光体的非印刷区域的区域中的显影剂材料的特征来评估供体辊的重新加载功能。 该方法然后改变打印图像电荷以将重新加载功能保持在预定范围内。

公开(公告)号：US07593654B2

公开(公告)日：2009-09-22

申请号：US11623361

申请日：2007-01-16

申请人： Palghat S. Ramesh ,  Aaron M. Burry ,  Christopher A. Dirubio ,  William C. Dean

发明人： Palghat S. Ramesh ,  Aaron M. Burry ,  Christopher A. Dirubio ,  William C. Dean

IPC分类号： G03G15/00

CPC分类号： G03G15/0266 ,  G03G2215/00037

摘要： A xerographic marking engine adjusts a charging actuator, such as an AC peak-to-peak voltage or an AC peak-to-peak AC current, based upon toner patch density measurements made using, e.g., a toner patch density sensor. The sensor is used to detect a knee in a toner mass density curve obtained by sweeping an AC peak-to-peak voltage or an AC peak-to-peak current. Once the knee is located, an AC charging actuator peak-to-peak voltage or AC peak-to-peak current is determined that reduces the amount of positive charge that is deposited onto the surface of the photoconductor, thereby extending its life while maintaining acceptable print quality. The described approach may improve photoconductor life without significantly increasing production costs or complexity.

摘要翻译： 基于使用例如调色剂片密度传感器进行的调色剂片密度测量，静电印迹标记引擎调整充电致动器，例如AC峰峰值电压或AC峰 - 峰值AC电流。 该传感器用于检测通过扫描AC峰 - 峰电压或AC峰 - 峰电流获得的调色剂质量密度曲线中的膝盖。 一旦膝盖定位，AC充电执行机构的峰 - 峰电压或AC峰 - 峰电流被确定，减少了沉积在光电导体表面上的正电荷量，从而延长其使用寿命，同时保持可接受 打印质量。 所描述的方法可以提高感光体寿命而不显着增加生产成本或复杂性。

公开(公告)号：US07509076B2

公开(公告)日：2009-03-24

申请号：US11683199

申请日：2007-03-07

申请人： Michael F. Zona ,  Christopher A. Dirubio ,  Aaron Michael Burry ,  Palghat S. Ramesh

发明人： Michael F. Zona ,  Christopher A. Dirubio ,  Aaron Michael Burry ,  Palghat S. Ramesh

IPC分类号： G03G15/02

CPC分类号： G03G15/0216

摘要： Charging devices, electrostatic imaging devices, and methods generate a charging waveform having a DC bias component and an AC component for charging the imaging surface of a charge retentive member, the AC component having a substantially squarewave waveform.

摘要翻译： 充电装置，静电成像装置和方法产生具有直流偏压分量和交流分量的充电波形，用于对充电保持部件的成像表面进行充电，该交流分量具有基本方波波形。

公开(公告)号：US20080226353A1

公开(公告)日：2008-09-18

申请号：US11686577

申请日：2007-03-15

申请人： Palghat S. RAMESH ,  John F. KNAPP ,  Paul John MCCONVILLE ,  Daniel M. BRAY ,  Robert PICTOR ,  Todd Kenneth PRESTON ,  Lawrence FLOYD ,  James Edward WILLIAMS ,  Michael Donald THOMPSON

发明人： Palghat S. RAMESH ,  John F. KNAPP ,  Paul John MCCONVILLE ,  Daniel M. BRAY ,  Robert PICTOR ,  Todd Kenneth PRESTON ,  Lawrence FLOYD ,  James Edward WILLIAMS ,  Michael Donald THOMPSON

IPC分类号： G03G15/09

CPC分类号： G03G15/0921 ,  G03G2215/0648

摘要： An apparatus for loading one or more donor rolls of a developer unit, comprising a developer housing having a reservoir for a developer material, a rotatable first donor roll that delivers the toner onto a moving photoconductive member, a trim roll that receives developer material from the reservoir and delivers the developer material to a first magnetic brush roller that delivers toner to the first donor roll, and a rotatable second magnetic brush roll that receives the developer material from the first magnetic brush roll and delivers the toner to the first donor roll. The apparatus may further comprise a rotatable second donor roll that receives the toner from the second magnetic brush roll and delivers the toner onto the photoconductive member, and a rotatable third magnetic brush roll that receives the developer material from the second magnetic brush roll and delivers the toner to the second donor roll. The apparatus may further comprise a trim blade for trimming excess developer material from the trim roll.

摘要翻译： 一种用于装载显影剂单元的一个或多个供体辊的装置，包括具有用于显影剂材料的储存器的显影剂壳体，将调色剂输送到移动的感光体上的可旋转的第一供体辊，从所述显影剂容器接收显影剂材料的装饰辊 将显影剂材料输送到将调色剂输送到第一供体辊的第一磁刷辊和可旋转的第二磁刷辊，其从第一磁刷辊接收显影剂材料并将调色剂输送到第一供体辊。 该装置还可以包括可旋转的第二供体辊，其从第二磁刷辊接收调色剂并将调色剂输送到感光体上，以及可旋转的第三磁刷辊，其从第二磁刷辊接收显影剂材料， 调色剂到第二供体辊。 该装置还可以包括用于从修剪卷修剪多余显影剂材料的修剪刀片。

公开(公告)号：US06775502B1

公开(公告)日：2004-08-10

申请号：US10373478

申请日：2003-02-24

申请人： Gerald A. Domoto ,  Donald M. Bott ,  Shu Chang ,  Palghat S. Ramesh ,  Fa-Gung Fan

发明人： Gerald A. Domoto ,  Donald M. Bott ,  Shu Chang ,  Palghat S. Ramesh ,  Fa-Gung Fan

IPC分类号： G03G1510

CPC分类号： G03G15/11

摘要： A system includes at least one movable image bearing member transporting a latent image in an electrophotographic printing system. A developer station associated with the at least one image bearing member deposits a developed image on the latent image. The developed image includes toner particles and carrier liquid. A transfer station associated with the at least one image bearing member transfers the developed image to a receiving medium. A liquid removal station disposed between the developer station and the transfer station includes a source of high fluid pressure emitting an open-air jet of fluid for directly and/or indirectly removing at least a portion of the carrier liquid from the developed image.

摘要翻译： 系统包括在电子照相打印系统中传送潜像的至少一个可移动图像承载部件。 与所述至少一个图像承载部件相关联的显影器站将显影图像沉积在潜像上。 显影图像包括调色剂颗粒和载体液体。 与至少一个图像承载部件相关联的传送站将显影图像传送到接收介质。 设置在显影剂站和转运站之间的液体移除站包括高流体源的发射源，用于直接和/或间接地从显影图像去除载体液体的至少一部分。

公开(公告)号：US08807737B2

公开(公告)日：2014-08-19

申请号：US13490557

申请日：2012-06-07

申请人： Bruce Earl Thayer ,  Palghat S. Ramesh

发明人： Bruce Earl Thayer ,  Palghat S. Ramesh

IPC分类号： B41J2/01

CPC分类号： B41J2/17593 ,  B41J2/0057 ,  B41J11/002

摘要： An inkjet offset printer includes a heated drum assembly having a hollow drum with an internal surface defining an internal cavity and a heater located in the internal cavity. The heater includes a reflector having a seal, and at least one heating element configured to generate heat and disposed between the reflector and the internal surface of the drum. The seal contacts the internal surface of the hollow drum to confine the generated heat within a space defined by the reflector and the internal surface of the drum.

摘要翻译： 喷墨偏移打印机包括具有中空滚筒的加热滚筒组件，该中空滚筒具有限定内腔的内表面和位于内腔中的加热器。 加热器包括具有密封件的反射器，以及至少一个加热元件，其配置成产生热量并且设置在反射器和滚筒的内表面之间。 密封件接触中空鼓的内表面以将产生的热量限制在由反射器和滚筒的内表面限定的空间内。

公开(公告)号：US08668302B2

公开(公告)日：2014-03-11

申请号：US13495452

申请日：2012-06-13

申请人： Palghat S. Ramesh ,  Bruce E. Thayer ,  Rachael L. McGrath

发明人： Palghat S. Ramesh ,  Bruce E. Thayer ,  Rachael L. McGrath

IPC分类号： B41J29/393

CPC分类号： B41J2/21

摘要： An inkjet printer includes a plurality of color separation modules. Each color separation module includes an image receiving member and a printhead module configured to eject ink drops onto the image receiving member to form a color separation on the image receiving member. The printer is configured to transfix each color separation on each image receiving member to a single sheet to produce a composite ink image on the print medium after the print medium has passed by all of the color separation modules in the printer.

摘要翻译： 喷墨打印机包括多个分色模块。 每个分色模块包括图像接收构件和打印头模块，该打印头模块被配置为将墨滴喷射到图像接收构件上，以在图像接收构件上形成分色。 打印机被配置为将每个图像接收构件上的每个颜色分离转换成单张纸，以在打印介质已经通过打印机中的所有颜色分离模块之后在打印介质上产生复合油墨图像。