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2. 发明授权

US3724733A Web infeed mechanism 失效
标题翻译： WEB加密机制
公开(公告)号：US3724733A
公开(公告)日：1973-04-03
申请号：US3724733D
申请日：1972-02-03
申请人： HARRIS INTERTYPE CORP
发明人： SCHAFFER R , CRUM J
IPC分类号： B41F13/02 , B65H23/18 , B65H23/188 , B65H23/192
CPC分类号： B65H23/18 , B65H23/1888 , B65H2301/3112
摘要： An improved web infeed mechanism feeds a web of material to receiving rolls of a printing press and includes a web drive roll which is driven from the main press driveline through a chain drive assembly and harmonic drive unit. A hollow dancer roll is pivotally mounted on a pair of support arms and is pressed with a constant pressure against a bight portion of a U-shaped loop in the web by a pair of air cylinders. Upon movement of the hollow dancer roll from an initial position, a resilient member is flexed to change the resistance of a plurality of strain gauges on the resilient member. This results in a change in an output signal from a circuit containing the strain gauges and which signal is utilized to activate control apparatus to vary the peripheral speed of the web drive roll. This control apparatus includes a reversible permanent magnet control motor which is connected by a belt drive to a wave generator in the harmonic drive unit. To provide for an accurate response at different press speeds, the control apparatus also includes a tachometer which provides a signal which is directly proportional to the speed of rotation of the receiving rolls. This signal is multiplied by the signal from the strain gauges to provide an output signal which is utilized to energize the permanent magnet motor and vary the peripheral speed of the web drive roll upon movement of the dancer roll or a change in press speed.
摘要翻译：改进的幅材进给机构将材料网馈送到印刷机的接收辊，并且包括幅材驱动辊，其通过链驱动组件和谐波驱动单元从主压力传动系驱动。中空的浮动卷轴被枢转地安装在一对支撑臂上，并通过一对气缸以恒定的压力压在卷筒纸中的U形环的弯曲部分上。当中空浮动轮从初始位置移动时，弹性构件被弯曲以改变弹性构件上的多个应变计的阻力。这导致来自包含应变计的电路的输出信号的变化，并且使用哪个信号来激活控制装置来改变幅材驱动辊的圆周速度。该控制装置包括通过带驱动连接到谐波驱动单元中的波发生器的可逆永磁控制电动机。为了在不同的冲压速度下提供准确的响应，控制装置还包括转速计，其提供与接收辊的旋转速度成正比的信号。该信号乘以来自应变仪的信号，以提供输出信号，该输出信号用于激励永磁电动机，并且在调节辊的移动或压力变化时改变幅材驱动辊的圆周速度。

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