公开(公告)号：US06572096B1

公开(公告)日：2003-06-03

申请号：US09996696

申请日：2001-11-30

申请人： Bruce G. Johnson ,  Pete Gysling

发明人： Bruce G. Johnson ,  Pete Gysling

IPC分类号： B65H522

CPC分类号： B65H3/0684 ,  B65H7/02 ,  B65H2301/423245 ,  B65H2402/31 ,  B65H2404/1521 ,  B65H2511/152 ,  B65H2513/10 ,  B65H2513/104 ,  B65H2513/40 ,  B65H2513/53 ,  B65H2553/51 ,  B65H2220/01 ,  B65H2220/11 ,  B65H2220/03 ,  B65H2220/02

摘要： A media advance device includes a pick roller and a pair of sensors. The first sensor may be an encoder utilized to determine the speed of media advance. In addition, data from the first sensor and/or the second sensor may be utilized in a closed loop feedback system to alter the time in which an error signal may be returned according to the level of the media in the media tray. In addition, the speed of the media advance may be varied in real time to compensate for variations in the time intervals required to advance sheets of media from the media tray to the second sensor. By virtue of the detected speed of media advance as sensed by the first sensor and/or the second sensor, the level of media in the media tray may be calculated in a substantially accurate manner.

摘要翻译： 介质提前装置包括拾取辊和一对传感器。 第一传感器可以是用于确定介质提前速度的编码器。 此外，来自第一传感器和/或第二传感器的数据可以用在闭环反馈系统中，以根据介质托盘中的介质的水平来改变可能返回误差信号的时间。 此外，可以实时地改变介质提前的速度，以补偿将介质介质的介质从介质托盘推到第二传感器所需的时间间隔的变化。 通过由第一传感器和/或第二传感器感测到的检测到的介质提前速度，介质托盘中的介质水平可以以基本准确的方式计算。