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公开(公告)号：US5697608A
公开(公告)日：1997-12-16
申请号：US669727
申请日：1996-06-26
CPC分类号： B65H9/002 , B65H2511/242
摘要： An apparatus and method for registering and deskewing a sheet along a paper path. A pair of independently driven selectively actuable nips are used to drive a sheet transverse to a paper path direction until the edge of a sheet is registered laterally and in skew. The transverse nips are then deactivated and a drive nip moves the sheet in a process direction along the paper path. A first transport sensor senses the lead edge of a sheet, a second sensor is used to also detect the lead edge of a sheet within a certain distance from the detection by the first sensor. The transport drive nip can then be adjusted based on the transport time between the first transport sensor and the second transport sensor so that the sheet arrives at a registration sensor at the prescribed time. This apparatus and method allows the use of simple point type sensors as opposed to more complex and expensive sensor arrays.
摘要翻译： 一种用于沿着纸路径对片材进行配准和歪斜校正的设备和方法。 一对独立驱动的可选择性致动的夹头用于驱动横向于纸张路径方向的片材，直到片材的边缘横向和歪斜地登记。 横向压头然后被去激活，并且驱动压区沿着纸通道沿着处理方向移动纸张。 第一传送传感器感测纸张的前缘，第二传感器用于还检测与第一传感器的检测距离一定距离内的纸张的前缘。 然后可以基于第一传送传感器和第二传送传感器之间的传送时间来调整传送驱动夹持器，使得片材在规定时间到达对准传感器。 该装置和方法允许使用简单的点型传感器，而不是更复杂和昂贵的传感器阵列。
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公开(公告)号：US06374075B1
公开(公告)日：2002-04-16
申请号：US09559734
申请日：2000-04-28
申请人： Lawrence R. Benedict , Joannes N. M. DeJong , Vittorio R. Castelli , Lloyd A. Williams , Vincent M. Williams
发明人： Lawrence R. Benedict , Joannes N. M. DeJong , Vittorio R. Castelli , Lloyd A. Williams , Vincent M. Williams
IPC分类号： G03G1500
CPC分类号： B65H9/002 , B65H2301/331 , B65H2511/242 , B65H2511/40 , B65H2513/10 , B65H2515/30 , B65H2557/23 , G03G15/6564 , G03G15/6567 , G03G2215/00561 , G03G2215/00599 , G03G2215/00721 , B65H2220/01 , B65H2220/02
摘要： A copy machine having a high accuracy sheet registration system for precise placement of images on each copy sheet. The copy machine includes sensors with charge coupled devices (CCDs) that detect the sheet positions in two dimensions within the machine, and detect sheet arrival times at various positions with the machine. Using this detected information, the copy machine employs a multi-stage process to bring the sheet into contact with a color image moving on a photoreceptor belt, in synchronism with the position and speed of the image on the belt. The copy machine also monitors its own condition and makes predictions about needed preventive maintenance, to instruct personnel to service the machine before the machine fails.
摘要翻译： 一种具有高精度纸张登记系统的复印机，用于在每个复印纸上精确地放置图像。 复印机包括具有电荷耦合器件（CCD）的传感器，其在机器内检测两维的片材位置，并且在机器的各个位置处检测片材到达时间。 使用该检测到的信息，复印机采用多阶段处理，以使纸张与感光带上移动的彩色图像同步，与皮带上图像的位置和速度同步。 复印机还监控自身状况，并对所需的预防性维护进行预测，指导人员在机器故障前对机器进行维修。
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公开(公告)号：US6079814A
公开(公告)日：2000-06-27
申请号：US883988
申请日：1997-06-27
CPC分类号： B82Y15/00 , B41J11/007 , B41J2/04 , B41J2/06 , B41J2002/061
摘要： A droplet-on-demand ink jet printer uses electrostatic tacking of a recording medium, such as paper, to achieve simultaneously precise holding of an aligned recording medium on a dielectric surface of a transport belt, thereby providing precise motion quality of the recording medium relative to the printer's printhead, and improved ink droplet placement on the recording medium. The transport belt is electrostatically charged with a charge of one polarity, so that an electrostatic pressure is generated which precisely holds the recording medium in an aligned position on the transport belt, after it is fed thereon, and concurrently induces a charge of opposite polarity on the ink droplets ejected by the printhead, thereby accelerating the droplets toward the recording medium. The accelerated droplets reduce transverse forces on the droplets, such as transverse airflows, and placement errors caused by the repulsion of incoming droplets by previously printed images are further reduced by migration of the charges of the printed droplets through the recording medium and consequent charge cancellation, so that droplet placement is improved.
摘要翻译： 液滴按需喷墨打印机使用记录介质（例如纸）的静电贴合来实现对准的记录介质在输送带的电介质表面上的精确保持，从而提供记录介质相对的精确的运动质量 到打印机的打印头，并改善墨滴在记录介质上的位置。 输送带带有一个极性的电荷静电，从而产生静电压力，将静电压力精确地保持在输送带上的对准位置上，然后再将其输送到相对极性的电荷上 墨滴由打印头喷射，从而将液滴加速到记录介质。 加速的液滴减小液滴上的横向力，例如横向气流，并且通过预先打印的图像对进入的液滴的排斥引起的放置误差进一步减小，通过印刷液滴的电荷通过记录介质迁移并导致电荷消除， 从而提高了液滴的位置。
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4.发明授权Color image registration based upon belt and raster output scanner synchronization 有权基于皮带和光栅输出扫描仪同步的彩色图像配准公开(公告)号：US06456309B1
公开(公告)日：2002-09-24
申请号：US09626465
申请日：2000-07-26
IPC分类号： B41J2385
CPC分类号： G03G15/5008 , G03G15/0152 , G03G15/0163 , G03G2215/0158 , G03G2215/017 , H04N1/0473 , H04N1/1135 , H04N2201/0471 , H04N2201/04722 , H04N2201/04732 , H04N2201/04734 , H04N2201/04744 , H04N2201/04756
摘要： Color electrophotographic printers having latent image positions synchronized with start-of-scan signals. A laser source projects a laser beam onto a multifaceted rotating polygon that sweeps that beam in a scan line across a moving photoreceptor. A start-of-scan detector produces start-of-scan signals when the laser beam is in position to write a scan line. A belt sensor produces belt signals when indicia on the photoreceptor passes a reference position. A controller receives the belt signals and the start-of-scan and then adjusts the photoreceptors rotational velocity such that the belt signals are an integral multiple of the start-of-scan signals. To reduce the impact of drive roller eccentricities on belt signal to start-of-scan signal timing, the perimeters of photoreceptor roller elements are sub-multiples of the photoreceptor length.
摘要翻译： 具有与扫描开始信号同步的潜像位置的彩色电子照相打印机。 激光源将激光束投射到多面旋转的多边形上，该扫描线在扫描线上扫过运动的感光体。 当激光束处于写入扫描线的位置时，扫描扫描检测器产生扫描开始信号。 当感光体上的标记通过参考位置时，带传感器产生带信号。 控制器接收皮带信号和扫描开始，然后调节光感受器的旋转速度，使得皮带信号是扫描扫描信号的整数倍。 为了减小驱动辊偏心对皮带信号对起始扫描信号定时的影响，感光鼓元件的周长是感光体长度的次倍数。
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公开(公告)号：US5678159A
公开(公告)日：1997-10-14
申请号：US672489
申请日：1996-06-26
CPC分类号： B65H9/002 , G03G15/6564 , G03G15/6567 , B65H2511/242 , B65H2513/40 , G03G15/235 , G03G2215/00561 , G03G2215/00721
摘要： A deskewing and registering device for an electrophotographic printing machine. A single set of sensors determine the position and skew of a sheet in a paper path and generate signals indicative thereof. A pair of independently driven nips forward the sheet to a registration position in skew and at the proper time based on signals from a controller which interprets the position signals and generates the motor control signals. An additional set of sensors can be used at the registration position to provide feedback for updating the control signals as rolls wear or different substrates having different coefficients of friction are used.
摘要翻译： 一种用于电子照相印刷机的歪斜和记录装置。 一组传感器确定纸张路径中纸张的位置和偏斜，并产生指示纸张的信号。 基于解释位置信号并产生电动机控制信号的来自控制器的信号，一对独立驱动的夹钳在偏斜和适当的时间将纸张向前移动到对准位置。 在配准位置可以使用一组额外的传感器来提供用于更新控制信号的反馈，因为辊磨损或使用具有不同摩擦系数的不同衬底。
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公开(公告)号：US6059284A
公开(公告)日：2000-05-09
申请号：US781361
申请日：1997-01-21
CPC分类号： B65H9/002 , B65H5/062 , B65H2404/696 , B65H2404/6961
摘要： An apparatus and method for registering and deskewing a sheet along a sheet path. A pair of drive spheres are located in the sheet path. When a sheet enters the nips formed by the spheres the sheet is driven until it is sensed by a sensor. The drive spheres are driven by a pair of wheels which allow the spheres to rotate about any axis through their center and parallel to the plane of the sheet. The spheres are driven such that the sheet is side registered and deskewed as it is moved along the sheet path. Constant feedback from the sensors to the drive controller allows the sheet to be registered in a very short distance and has the added benefit of self compensation for wear of the drive components. The wide registration and deskewing latitude of the device allows for the use of relatively inexpensive and low accuracy sheet drives preceding the device.
摘要翻译： 一种用于沿片材路径对片材进行登记和偏斜的装置和方法。 一对驱动球位于片材路径中。 当纸张进入由球形成的胶片时，片材被驱动，直到被传感器感测到。 驱动球由一对轮驱动，这些轮允许球围绕其中心并平行于片的平面绕任何轴线旋转。 驱动球体，使得片材沿着片材路径移动时被侧向对准并进行歪斜校正。 从传感器到驱动控制器的恒定反馈允许纸张在非常短的距离内进行记录，并且具有对驱动部件磨损的自我补偿的附加益处。 该设备的广泛配准和偏移校正纬度允许在设备之前使用相对便宜且低精度的片式驱动器。
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公开(公告)号：US5715514A
公开(公告)日：1998-02-03
申请号：US720642
申请日：1996-10-02
CPC分类号： B65H9/002 , G03G15/6564 , G03G15/6567 , B65H2511/20 , B65H2513/104 , G03G15/235 , G03G2215/00405 , G03G2215/00561 , G03G2215/00569
摘要： There is provided a calibration system for a deskewing and registering device for an electrophotographic printing machine. The method includes a.) moving a sheet from a first position to a second position along a paper path; b.) sensing the position of the sheet at the first position and the second position; c.) choosing a correction value to cause the sheet to change a lateral position from the first position to the second position; d.) repeating the moving, sensing, and choosing steps until a predetermined adjustment is made when moving the sheet from the first position to the second position to determine a proper calibration value.
摘要翻译： 提供了一种用于电子照相打印机的偏移和记录装置的校准系统。 该方法包括：a）沿着纸张路径将片材从第一位置移动到第二位置; b。）感测纸张在第一位置和第二位置的位置; c。）选择校正值以使所述纸张从第一位置改变到第二位置的横向位置; d。）重复移动，感测和选择步骤，直到在将纸张从第一位置移动到第二位置时进行预定的调整以确定适当的校准值。
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公开(公告)号：US08682233B2
公开(公告)日：2014-03-25
申请号：US13282061
申请日：2011-10-26
CPC分类号： G03G15/1615 , G03G2215/00156 , G03G2215/0158
摘要： An apparatus including a transfer belt, an edge sensor and a belt steering roll. The transfer belt having a lateral edge and the edge sensor detecting lateral positions of the lateral edge as it passes the edge sensor. The belt steering roll controlling lateral movement of the transfer belt, which is rotatably mounted maintaining rolling engagement with the transfer belt. An axis of rotation of the belt steering roll selectively tiltable defining a steering angle with respect to an axis reference orientation. Changes in the steering angle inducing a lateral shift profile to the lateral edge. The lateral shift profile defined by changes to the lateral positions of the lateral edge during a period. The steering angle being changed based on a differential between a currently detected lateral position of a segment of the lateral edge and a predetermined lateral position derived from the lateral shift profile.
摘要翻译： 一种包括转印带，边缘传感器和皮带转向辊的装置。 所述转印带具有侧边缘，并且所述边缘传感器在所述侧边缘通过所述边缘传感器时检测所述侧边缘的横向位置。 皮带转向辊控制转印带的横向移动，转印带可旋转地安装，保持与转印带的滚动接合。 皮带转向辊的旋转轴线可选择性地倾斜，从而相对于轴线参考方向限定转向角。 转向角的变化导致横向偏移轮廓到侧边缘。 横向偏移轮廓由一段时间内横向边缘的侧向位置的变化而定义。 基于侧向边缘的段的当前检测到的横向位置与从横向偏移轮廓导出的预定横向位置之间的差异来改变转向角。
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公开(公告)号：US08474818B2
公开(公告)日：2013-07-02
申请号：US13084272
申请日：2011-04-11
IPC分类号： B65H5/02
CPC分类号： B65H9/002 , B65H5/062 , B65H2404/133 , B65H2404/143 , B65H2404/1442
摘要： Methods and system for reducing sheet skew in a sheet transport system are disclosed. A sheet transport system may include an idler wheel, a drive wheel a drive motor and an actuator. The idler wheel may have a substantially rigid outer layer. The drive wheel may have a compliant outer layer and may correspond to the idler wheel. The drive motor may be operably connected to the drive wheel and may be configured to cause the drive wheel to rotate around a shaft. The actuator may be operably connected to the drive wheel and configured to cause the drive wheel to move between a closed position and an open position. The drive wheel is configured to contact a sheet in the closed position and to not contact a sheet in the open position.
摘要翻译： 公开了一种用于减少片材输送系统中的片材偏斜的方法和系统。 片材输送系统可以包括惰轮，驱动轮，驱动马达和致动器。 惰轮可以具有基本刚性的外层。 驱动轮可以具有柔顺的外层并且可以对应于惰轮。 驱动马达可以可操作地连接到驱动轮，并且可以构造成使得驱动轮围绕轴旋转。 致动器可以可操作地连接到驱动轮并且构造成使得驱动轮在关闭位置和打开位置之间移动。 驱动轮构造成在关闭位置接触片材并且不接触处于打开位置的片材。
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公开(公告)号：US20130033535A1
公开(公告)日：2013-02-07
申请号：US13196269
申请日：2011-08-02
IPC分类号： B41J29/38
CPC分类号： H04N1/506 , H04N1/0473 , H04N2201/0082 , H04N2201/0471 , H04N2201/04734 , H04N2201/04737 , H04N2201/04786
摘要： A method of adjusting the operation of printheads in a printing system with a moving sheet carrying device has been developed. The method includes identifying a first amount of sheet carrying device displacement and second amount of sheet carrying device displacement as the sheet carrying device carries a media sheet past first and second printheads, respectively, for imaging of a predetermined location of the media sheet. A time for operating the second printhead is adjusted based on a difference between the first sheet carrying device offset and the second sheet carrying device offset to provide color registration between ink drops of the first printhead and second printhead on the media sheet.
摘要翻译： 已经开发了一种利用移动片材传送装置来调节打印系统中的打印头的操作的方法。 该方法包括识别第一量的片材承载装置位移和第二量的片材承载装置位移，因为片材承载装置分别将介质片传送经过第一和第二打印头，以便对介质片材的预定位置进行成像。 基于第一纸张承载装置偏移和第二纸张承载装置偏移之间的差异来调节用于操作第二打印头的时间，以在第一打印头的墨滴和介质片上的第二打印头之间提供颜色配准。
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