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    Image forming apparatus
    101.
    发明公开
    Image forming apparatus 失效
    Bilderzeugungsgerätmit Amplituden- und Phasendetektion von Registerfehlern

    公开(公告)号：EP0818917A2

    公开(公告)日：1998-01-14

    申请号：EP97111366.7

    申请日：1997-07-04

    Applicant: FUJI XEROX CO., LTD.

    Inventor： Mori, Hirotaka ,  Ando, Ryo

    IPC: H04N1/047 ,  H04N1/50

    CPC classification number: H04N1/506 ,  H04N1/047 ,  H04N1/12 ,  H04N2201/02416 ,  H04N2201/02439 ,  H04N2201/03108 ,  H04N2201/04712 ,  H04N2201/04722 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04734 ,  H04N2201/04755 ,  H04N2201/04756 ,  H04N2201/04791 ,  H04N2201/04794

    Abstract: An image forming apparatus which forms toner images of different colors by at least one image forming means with a rotatably driven image bearing means, and forms a picture by transferring the different colored toner images formed by the image forming means onto an image transfer medium supported on a rotatably driven endless bearing means, or directly onto the endless bearing means,
       the image forming apparatus wherein a latent image writing position on the image bearing means being angularly spaced by approximately 180° from an image transfer position comprising:

    pattern detecting means for detecting a color misregistration detecting pattern formed on the endless bearing means; and
    drive control means for individually controlling rotation speeds of rotary means, such as the image bearing means and the endless bearing means, so as to suppress a periodical rotation variation by using detecting information of a vibration component on the periodical rotation variation, which is obtained from detecting signals derived from the pattern detecting means.

    Abstract translation: 一种图像形成装置，其通过具有可旋转驱动的图像承载装置的至少一个图像形成装置形成不同颜色的调色剂图像，并且通过将由图像形成装置形成的不同着色的调色剂图像转印到支撑在图像转印介质上的图像转印介质上而形成图像 旋转驱动的环形轴承装置，或直接地设置在环形轴承装置上，图像形成装置，其中图像承载装置上的潜像写入位置与图像转印位置成角度地间隔大约180°，包括：图案检测装置， 形成在无端轴承装置上的颜色对准检测图案; 以及用于单独控制诸如图像承载装置和环形轴承装置的旋转装置的转速的驱动控制装置，以便通过使用获得的周期性旋转变化中的振动分量的检测信息来抑制周期性的旋转变化 从检测从图案检测装置得到的信号。

    Technique for precise color-to-color registration in thermal printers
    103.
    发明授权
    Technique for precise color-to-color registration in thermal printers 失效
    一种用于准确的颜色叠加在感热式打印机还原法

    公开(公告)号：EP0538859B1

    公开(公告)日：1997-06-25

    申请号：EP92118096.4

    申请日：1992-10-22

    Applicant: EASTMAN KODAK COMPANY

    Inventor： Mackin, Thomas Andrew, c/o Eastman Kodak Company ,  Guy, William Fred, c/o Eastman Kodak Company ,  Auer, Scott Lanning, c/o Eastman Kodak Company

    IPC: H04N1/04 ,  H04N1/46 ,  G06K15/12

    CPC classification number: H04N1/0671 ,  G06K15/028 ,  H04N1/047 ,  H04N1/06 ,  H04N1/508 ,  H04N2201/02416 ,  H04N2201/02425 ,  H04N2201/02439 ,  H04N2201/03108 ,  H04N2201/03158 ,  H04N2201/0471 ,  H04N2201/04724 ,  H04N2201/04725 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04732 ,  H04N2201/04734 ,  H04N2201/04739 ,  H04N2201/04755 ,  H04N2201/04756 ,  H04N2201/04767 ,  H04N2201/04789 ,  H04N2201/04791 ,  H04N2201/04794

    Abstract: There is disclosed a method for providing precise color-to-color registration of color dots in a multicolor proof with a thermal printer comprising a CPU and Printer Controller, a Motion Controller, a writing drum, and a writing head coupled to a translation means. Using the disclosed method, a proof and a dye donor member with a predetermined dye color thereon are mounted on the writing drum. The writing head is then moved to a predetermined start position defined by a sensor at a predetermined position along the translation means which has its optical path blocked by the writing head. The writing head is then moved forward to a predetermined home position which is defined by a next subsequent pulse from a multi-pulse radial position-indicating encoder coupled to the translation means occurring after the writing head leaves the start position. In sequence, the writing drum and then the translation means are accelerated with a separate predetermined substantially constant acceleration until a separate predetermined velocity is obtained. After the predetermined velocity of the translation means is obtained, the printing of color dots on the proof is started upon the receipt of a next subsequent pulse from a multi-pulse radial position-indicating encoder coupled to the writing drum. 1. A method of printing color dots on a multicolor proof with a thermal printer comprising a rotatable writing drum and a writing head which is coupled to a translation means comprising the steps of: (a) activating the translation means for moving the writing head to a predetermined fixed start position; (b) moving the writing head in a forward direction to a home position defined by the detection of a next subsequent pulse from a first radial position encoder coupled to the translation means after the writing head has reached the predetermined fixed start position in step (a), and simultaneously therewith stopping the movement of the translation means and the writing head, where the first radial positional encoder produces a predetermined plurality of pulses per revolution of the translation means; (c) accelerating the writing drum with a substantially constant acceleration to a predetermined velocity in response to the receipt of the next subsequent pulse from the first radial position encoder in step (b); (d) accelerating the translation means with a predetermined substantially constant acceleration to a predetermined velocity in response to the writing drum reaching the predetermined velocity in step (c); (e) selectively energizing a predetermined number of thermal elements in the writing head for starting the printing of color dots of a dye color onto a receiver member mounted on the writing drum in response to the writing drum reaching a predetermined radial position after the translation means has reached the predetermined velocity; and (f) repeating steps (a) through (e) for each other dye color needed to print the multicolor proof.

    Write head controller
    107.
    发明授权
    Write head controller 失效
    手写笔控制单元。

    公开(公告)号：EP0327929B1

    公开(公告)日：1994-05-04

    申请号：EP89101633.9

    申请日：1989-01-31

    Applicant: POLAROID CORPORATION

    Inventor： Plummer, William T.

    IPC: G06K15/22 ,  H04N1/04

    CPC classification number: H04N1/0678 ,  G01D5/264 ,  G01D5/36 ,  H04N1/047 ,  H04N1/06 ,  H04N2201/02416 ,  H04N2201/02439 ,  H04N2201/03108 ,  H04N2201/0471 ,  H04N2201/04724 ,  H04N2201/04727 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04734 ,  H04N2201/04755 ,  H04N2201/04756 ,  H04N2201/04789 ,  H04N2201/04791 ,  H04N2201/04794

    Abstract: A system for precisely positioning a printing element relative to a rotating drum, as in a drum printer, employs two position signals for alignment purposes. A pair of linear grids is disposed along a path of travel of the printing element for generating, with the aid of optical beam and sensor devices, a periodic electric signal which varies in accordance with printing element position. One of the grids is stationary and the second of the grids moves with a carriage supporting the printing element. An encoder positioned alongside the drum is operative with a set of markings having a variation in spatial frequency, or a grid overlay, to produce an alternating electric signal which varies in accordance with rotational position of the drum. Motors which rotate the drum as well as a lead screw which translates the printing element may be constructed as synchronous motors to permit phase locking to each other. Circuitry responsive to periodic signals outputted by the linear grids and the encoder introduce phase shift between motor drive signals to align position of the printing element with position of the drum independently of any backlash which may be present between the lead screw and the carriage driven by the lead screw.

    Image forming device
    108.
    发明授权
    Image forming device 失效
    图像形成装置。

    公开(公告)号：EP0345019B1

    公开(公告)日：1994-03-16

    申请号：EP89305438.7

    申请日：1989-05-30

    Applicant: FUJITSU LIMITED

    Inventor： Hayashida, Nobuyuki

    IPC: G06K15/16 ,  G06K15/12

    CPC classification number: G06K15/1219 ,  G06K15/16 ,  H04N1/047 ,  H04N1/12 ,  H04N1/193 ,  H04N2201/03108 ,  H04N2201/0471 ,  H04N2201/04731 ,  H04N2201/04732 ,  H04N2201/04737 ,  H04N2201/04756 ,  H04N2201/04781 ,  H04N2201/04789 ,  H04N2201/04791

    Abstract: An image forming device, such as an LED printer, liquid crystal printer, laser printer or the like, comprises a sheet feeding unit (2), a sheet carrier (22), a pulse motor (12) provided for the sheet carrier (22) and driven to carry a sheet (10) fed from the sheet feeding unit (20) to a printer (16) for printing an image over at least one entire line of a sheet (10), and which is perpendicular to the direction in which the sheet is carried, by one printing operation thereof, a motor controller (14) for controlling the stepping motion of the pulse motor (12) for moving the sheet (10), a printing controller (18) for controlling the printing operation of the printer (16) in such a way that each printing operation thereof is synchronized with the stepping motion of the pulse motor (12), and an outlet tray (24) for receiving the printed sheet (10). Such a device can be of smaller size, and can be cheaper to produce, than previously-proposed devices.

    Technique for precise color-to-color registration in thermal printers
    109.
    发明公开
    Technique for precise color-to-color registration in thermal printers 失效
    Verfahren zur genauenFarbenübereinandersetzungbei thermischen Druckern。

    公开(公告)号：EP0538859A1

    公开(公告)日：1993-04-28

    申请号：EP92118096.4

    申请日：1992-10-22

    Applicant: EASTMAN KODAK COMPANY

    Inventor： Mackin, Thomas Andrew, c/o Eastman Kodak Company ,  Guy, William Fred, c/o Eastman Kodak Company ,  Auer, Scott Lanning, c/o Eastman Kodak Company

    IPC: H04N1/04 ,  H04N1/46 ,  G06K15/12

    CPC classification number: H04N1/0671 ,  G06K15/028 ,  H04N1/047 ,  H04N1/06 ,  H04N1/508 ,  H04N2201/02416 ,  H04N2201/02425 ,  H04N2201/02439 ,  H04N2201/03108 ,  H04N2201/03158 ,  H04N2201/0471 ,  H04N2201/04724 ,  H04N2201/04725 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04732 ,  H04N2201/04734 ,  H04N2201/04739 ,  H04N2201/04755 ,  H04N2201/04756 ,  H04N2201/04767 ,  H04N2201/04789 ,  H04N2201/04791 ,  H04N2201/04794

    Abstract: There is disclosed a method for providing precise color-to-color registration of color dots in a multicolor proof with a thermal printer comprising a CPU and Printer Controller, a Motion Controller, a writing drum, and a writing head coupled to a translation means. Using the disclosed method, a proof and a dye donor member with a predetermined dye color thereon are mounted on the writing drum. The writing head is then moved to a predetermined start position defined by a sensor at a predetermined position along the translation means which has its optical path blocked by the writing head. The writing head is then moved forward to a predetermined home position which is defined by a next subsequent pulse from a multi-pulse radial position-indicating encoder coupled to the translation means occurring after the writing head leaves the start position. In sequence, the writing drum and then the translation means are accelerated with a separate predetermined substantially constant acceleration until a separate predetermined velocity is obtained. After the predetermined velocity of the translation means is obtained, the printing of color dots on the proof is started upon the receipt of a next subsequent pulse from a multi-pulse radial position-indicating encoder coupled to the writing drum.

    1. A method of printing color dots on a multicolor proof with a thermal printer comprising a rotatable writing drum and a writing head which is coupled to a translation means comprising the steps of:

    (a) activating the translation means for moving the writing head to a predetermined fixed start position;
    (b) moving the writing head in a forward direction to a home position defined by the detection of a next subsequent pulse from a first radial position encoder coupled to the translation means after the writing head has reached the predetermined fixed start position in step (a), and simultaneously therewith stopping the movement of the translation means and the writing head, where the first radial positional encoder produces a predetermined plurality of pulses per revolution of the translation means;
    (c) accelerating the writing drum with a substantially constant acceleration to a predetermined velocity in response to the receipt of the next subsequent pulse from the first radial position encoder in step (b);
    (d) accelerating the translation means with a predetermined substantially constant acceleration to a predetermined velocity in response to the writing drum reaching the predetermined velocity in step (c);
    (e) selectively energizing a predetermined number of thermal elements in the writing head for starting the printing of color dots of a dye color onto a receiver member mounted on the writing drum in response to the writing drum reaching a predetermined radial position after the translation means has reached the predetermined velocity; and
    (f) repeating steps (a) through (e) for each other dye color needed to print the multicolor proof.

    Abstract translation: 公开了一种使用包括CPU和打印机控制器，运动控制器，书写鼓和耦合到翻译装置的书写头的热敏打印机在多色证明中提供彩色点的精确颜色到颜色配准的方法。 使用所公开的方法，将具有预定染料颜色的证明和染料供体构件安装在书写鼓上。 然后将书写头移动到沿着平移装置的预定位置由传感器限定的预定起始位置，该平移装置的光路被写入头阻挡。 然后，写入头向前移动到预定的起始位置，该预定的起始位置由写入头离开开始位置之后出现的与连接到平移装置的多脉冲径向位置指示编码器的下一个后续脉冲限定。 顺序地，书写鼓和平移装置以单独的预定的基本恒定的加速度加速，直到获得单独的预定速度。 在获得翻译装置的预定速度之后，在从耦合到书写鼓的多脉冲径向位置指示编码器接收到下一个后续脉冲时，开始证明上的彩色点的打印。 1.一种使用热敏打印机在多色证明上印刷彩色点的方法，所述热敏打印机包括可旋转书写鼓和耦合到翻译装置的书写头，包括以下步骤：（a）激活所述翻译装置以将书写头移动到 预定的固定起始位置; （b）在步骤（a）中写入头已经到达预定的固定起始位置之后，将写入头沿向前方向移动到由耦合到平移装置的第一径向位置编码器检测下一个后续脉冲所限定的初始位置 ），并且同时停止翻译装置和书写头的移动，其中第一径向位置编码器每转产生预定的多个脉冲; （c）响应于在步骤（b）中从所述第一径向位置编码器接收到下一个后续脉冲，加速所述书写鼓以基本恒定的加速度到预定速度; （d）响应于所述书写鼓在步骤（c）中达到预定速度，以预定的基本上恒定的加速度将所述平移装置加速到预定速度; （e）选择性地激励写入头中的预定数量的热元件，用于响应于书写鼓在翻译装置之后达到预定的径向位置，开始将染色的彩色点打印到安装在书写滚筒上的接收器构件上 已达到预定速度; 和（f）对于打印多色证明所需的每种其它染料颜色重复步骤（a）至（e）。

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