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    • 4. 发明授权
    • Stack height sensing system
    • 堆高度传感系统
    • US5207416A
    • 1993-05-04
    • US858459
    • 1992-03-27
    • Jose J. Soler
    • Jose J. Soler
    • B65H1/18B65H7/04
    • B65H1/18B65H2553/11B65H2553/26
    • An apparatus in which a stack of sheets is detected at a preselected location. An air jet is directed towards an edge of the stack of sheets at a preselected location. A pressure transducer is located at the prescribed location and positioned to have the air jet at impact thereon. The pressure transducer is enabled to transmit a signal indicative of the absence of the stack of sheets at the preselected location in response to the air jet impacting thereon. The pressure transducer is inhibited from transmitting the signal in response to the stack of sheets blocking the air jet. When the stack of sheets blocks the air jet, the signal from the pressure transducer indicates the presence of the stack of sheets at the preselected location. A pneumatic stack height detector of this type may be used to regulate the movement of a stack of sheets used in electrophotographic printing machines.
    • 一种在预选位置检测到一叠纸张的装置。 空气喷嘴在预选位置处被引导到纸张堆的边缘。 压力传感器位于规定的位置并定位成使空气射流在其上冲击。 压力传感器能够响应于冲击其上的空气喷射而在预选位置处传送指示不存在纸叠的信号。 压力传感器被阻止响应于阻塞空气喷射的一叠纸张而发送信号。 当堆叠的纸张阻挡空气喷嘴时,来自压力传感器的信号指示在预选位置处存在纸张堆叠。 这种类型的气动叠层高度检测器可用于调节在电子照相印刷机中使用的一叠纸张的移动。