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1. 发明授权

US4625644A Apparatus for an offset printing press 失效
标题翻译：胶版印刷机的装置
公开(公告)号：US4625644A
公开(公告)日：1986-12-02
申请号：US750933
申请日：1985-07-01
申请人： Mark H. Bouliane , John D. Rohsner
发明人： Mark H. Bouliane , John D. Rohsner
IPC分类号： B41F31/18 , B41K3/12 , B41L19/00 , B41L47/46
CPC分类号： B41F31/18 , B41K3/126 , B41L19/006
摘要： An offset printing press includes a blanket cylinder defining a first cylindrical surface having a radius r.sub.1 and a recessed section. A blanket is tightly stretched around the blanket cylinder and defines a second cylindrical surface having a radius r.sub.2 greater than r.sub.1. An impression cylinder is aligned with the blanket cylinder to define a printing interface between the blanket cylinder and the impression cylinder to receive paper sheets and to transfer an inked image from the blanket to the paper sheets. Drive means defines and maintains a fixed phase angle between the blanket cylinder and the immpression cylinder and rotates both cylinders at an equal angular velocity and in complementary directions to transfer images to the paper sheets. The number imprinting apparatus interfaces with the offset printing press and includes a number head having a body and a number imprinting surface. The body of the number head is retained within the recessed section of the blanket cylinder with the number imprinting surface aligned to contact the paper sheets as the number head is rotated through the printing interface. Synchronized inking means is located at a first angular position around the blanket cylinder and is angularly spaced apart from the printing interface. The synchronized inking means includes an ink transfer device, spacing means and displacing means. The spacing means maintains a gap between the ink transfer device and the blanket as the blanket is rotated past the ink transfer means. The displacing means periodically displaces the ink transfer device toward the blanket cylinder as the recessed section of the blanket cylinder is rotated past the ink transfer means. These periodic displacements of the ink transfer means cause the ink transfer means to contact the number head and transfer ink to the number imprinting surface of the number head.
摘要翻译：胶版印刷机包括限定具有半径r 1和凹陷部分的第一圆柱形表面的橡皮布滚筒。橡皮布紧紧地拉伸在橡皮布滚筒周围，并且限定了具有大于r1的半径r2的第二圆柱形表面。压印滚筒与橡皮布滚筒对准以在橡皮布滚筒和压印滚筒之间限定印刷界面，以接收纸张并将油墨图像从橡皮布传送到纸张。驱动装置在橡皮布滚筒和压缩滚筒之间限定和维持固定的相位角，并以相等的角速度和互补方向旋转两个滚筒，以将图像转印到纸张上。数字压印装置与胶印机接口，并且包括具有主体和数字压印表面的数字头。数字头部的主体保持在橡皮布滚筒的凹陷部分内，当数字头旋转穿过印刷界面时，数字印迹表面对准以接触纸张。同步喷墨装置位于橡皮布滚筒周围的第一角度位置处，并且与印刷界面成角度地间隔开。同步油墨装置包括油墨转印装置，间隔装置和置换装置。当毯子旋转经过墨水传送装置时，间隔装置保持墨水传送装置和橡皮布之间的间隙。当橡皮滚筒的凹部旋转经过墨水传送装置时，移位装置周期性地将墨水传送装置移动到橡皮布滚筒。油墨传送装置的这些周期性位移使墨水传送装置接触数字头并将墨水转移到数字头的数字印记表面。

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