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1. 发明授权

US4426149A Photocopier scanning drive system 失效
标题翻译：复印机扫描驱动系统
公开(公告)号：US4426149A
公开(公告)日：1984-01-17
申请号：US326063
申请日：1981-11-30
申请人： Klaus Kuemmel , Gerhard Klapettek , Siegfried Schneider
发明人： Klaus Kuemmel , Gerhard Klapettek , Siegfried Schneider
IPC分类号： G03B27/34 , G03B27/50 , G03B27/52 , G03G15/04 , G03G15/043 , H02P5/52 , H02P29/00 , G03G15/00
CPC分类号： G03B27/525 , Y10S388/911 , Y10S388/915
摘要： A photocopier scanning system has a scanning member (which may be the scanning lamp, a scanning mirror, a scanning slit, or a document carrier) on a scanning system powered by a d.c. drive motor synchronized to the rotation of the a.c. main drive motor for the other components of the photocopier. A variable programmer using a phase locked loop control circuit including pulse encoders slaved to the motors maintains strict synchronization between the scanning drive motor and the main drive motor with an appropriate proportionality dependent upon the image magnification/reduction ratio of the photocopier. The optical system may include a movable zoom lens element which gives infinitely variable selection of the magnification/reduction ratio, and which can readily be connected to the programmer to achieve an infinitely variable proportionality between the speeds of the scanning drive motor and the main drive motor to suit any such magnification/reduction ratio. Also the output of the exposure lamp is variable in accordance with the magnification/reduction ratio.
摘要翻译：复印机扫描系统在由直流电源供电的扫描系统上具有扫描构件（其可以是扫描灯，扫描镜，扫描狭缝或文档载体）。驱动电机同步旋转a.c. 复印机其他部件的主驱动电机。使用包括从动电机的脉冲编码器的锁相环控制电路的可变编程器根据复印机的图像倍率/缩小率，以适当的比例来保持扫描驱动马达与主驱动马达之间的严格同步。该光学系统可以包括一个可移动的变焦透镜元件，它可以无级地选择放大/缩小比率，并且可以容易地连接到编程器，以实现扫描驱动马达和主驱动马达的速度之间的无级变比比例以适应任何这种放大/缩小比例。此外，曝光灯的输出也可以根据放大率/缩小率而变化。

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