公开(公告)号：US4653008A

公开(公告)日：1987-03-24

申请号：US743553

申请日：1985-06-11

申请人： Masanori Kai ,  Satoshi Hisabayashi ,  Seiichi Homma ,  Yousuke Igarashi

发明人： Masanori Kai ,  Satoshi Hisabayashi ,  Seiichi Homma ,  Yousuke Igarashi

IPC分类号： G03F9/00 ,  G06F15/46 ,  B65H7/02

CPC分类号： G03F9/00 ,  G05B2219/41092 ,  G05B2219/45212

摘要： A method of controlling a position of a plate material sheet in a platemaking machine for feeding the plate material sheet in an exposure region and forming a document image on the plate material sheet. A plate material sheet length sensor detects that the plate material sheet to be fed to the exposure region has passed by the sensor. The overall length of the plate material sheet is calculated in accordance with the number of pulses supplied to a plate material sheet drive motor while the plate material sheet length sensor generates an output. Also calculated is a first predetermined number of pulses to be supplied to the plate material sheet drive motor so as to feed the plate material sheet by a first predetermined length within the exposure region. A stop sensor detects a front edge of the plate material sheet, the stop sensor being arranged such that a center thereof is aligned with the axis of the optical system; and the first predetermined number of pulses is supplied to the plate material sheet drive motor after the stop sensor generates an output, so that a center of a first portion of the plate material sheet is aligned with the axis of the optical system.

摘要翻译： 一种在制版机中控制板材的位置的方法，用于将板材供给到曝光区域并在平板材料板上形成文件图像。 板材长度传感器检测到要被传送到曝光区域的板材片通过传感器。 当板材长度传感器产生输出时，根据提供给板材驱动电动机的脉冲数来计算板材的总长度。 还计算出将被提供给板材片驱动电机的第一预定数量的脉冲，以便在曝光区域内将板材供给第一预定长度。 停止传感器检测板材的前缘，停止传感器被布置成使得其中心与光学系统的轴线对准; 并且在停止传感器产生输出之后将第一预定数量的脉冲提供给板材片驱动电动机，使得板材片的第一部分的中心与光学系统的轴线对准。