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    • 4. 发明授权
    • Sheet feeder with variable length, variable speed sheetpath
    • 片材进料器,长度可变,片速可变
    • US5941518A
    • 1999-08-24
    • US354387
    • 1994-12-12
    • Russell J. SokacKathleen M. MartinMichael J. MartinLloyd W. Durfey
    • Russell J. SokacKathleen M. MartinMichael J. MartinLloyd W. Durfey
    • B65H1/04B65H3/04B65H5/36B65H5/34
    • B65H3/047B65H1/04B65H5/36B65H2301/423245B65H2402/343B65H2405/15B65H2511/11B65H2511/152B65H2513/10
    • A floating feedhead having a variable sheetpath for an electrophotographic printing machine. A feeder for feeding sheets from the top of a stack to a processor for a printing machine is disclosed. The feedhead is of a standard retard feed type having either a nudger roll/feed roll or a feed belt in combination with a retard member to separate sheets. The feedhead is connected to the sheet delivery area of the machine by a variable length, variable speed sheetpath. The sheetpath has a drive member such as a drive nip in cooperation with the feedhead. When the sheetpath is at its longest the feedhead and variable drive member operate at a higher speed to deliver the sheets to the sheet intake area at a predetermined time interval. As sheets are fed and the sheetpath becomes shorter, the variable drive and feedhead slow to maintain proper sheet timing. The sheetpath may be of a telescopic baffle configuration or could alternatively be a variable speed vertical transport arrangement.
    • 具有用于电子照相印刷机的可变片材路径的浮动馈送头。 公开了一种用于将纸张从堆叠的顶部进给到用于印刷机的处理器的进料器。 进料头具有标准延迟进料型,其具有微型滚筒/进料辊或进料带以及用于分离薄片的延迟构件。 进料头通过可变长度,可变速度的纸张路径连接到机器的纸张输送区域。 片材路径具有与进给头协作的诸如驱动辊隙的驱动构件。 当片材路径最长时,馈送头和可变驱动构件以更高的速度操作,以预定的时间间隔将片材输送到片材进入区域。 当纸张进给并且纸张路径变短时,可变驱动器和进给头缓慢以保持适当的纸张定时。 片材路径可以是伸缩挡板构造,或者可以是变速垂直传送装置。
    • 6. 发明授权
    • Apparatus and method for sheet feeding and separating using retard roll
relief/enhancement
    • 使用延迟辊释放/增强的片材进给和分离的装置和方法
    • US5435540A
    • 1995-07-25
    • US205447
    • 1994-03-04
    • Michael J. MartinKathleen M. MartinRussel J. SokacLloyd W. DurfeyGerald M. GaravusoRobert P. SiegelSteven R. Moore
    • Michael J. MartinKathleen M. MartinRussel J. SokacLloyd W. DurfeyGerald M. GaravusoRobert P. SiegelSteven R. Moore
    • B65H3/00B65H3/52
    • B65H3/00B65H2511/224B65H2511/52B65H2515/10B65H2515/30
    • A sheet feeding and separating apparatus for feeding sheets from a stack by exerting a drive force against the top sheet. The sheet is urged off the stack by a nudger roll toward a retard nip formed where a feed roll contacts a retard roll. The retard roll is movable relative to the feed roll, and thus is capable of producing drive forces of varying magnitude at the retard nip to propel a sheet toward the copying mechanism. A controller signals the nudger roll to urge a sheet off the stack and then monitors a sensor to determine whether the sheet passes through the retard nip. A misfeed condition occurs when the sensor fails to detect a sheet within a predetermined length of time. In response, the controller moves the retard roll toward the feed roll to increase the drive force exerted on the sheet. The retard roll is further adapted to detect the occurrence of a multifeed when multiple sheets contact the retard nip. In response, the controller moves the retard roll away from, but remaining in contact with, the feed roll to decrease the drive force exerted on the sheet, thereby permitting individual sheets to pass through freely.
    • 一种纸张馈送和分离装置,用于通过对顶片施加驱动力来从纸堆输送纸张。 纸张通过微型滚筒朝着形成在进给辊接触延迟辊上的延迟压区推动离开堆叠。 减速辊相对于进给辊是可移动的,因此能够在延迟压区处产生不同幅度的驱动力,以将片材推向复制机构。 控制器用信号通知微型滚筒来将纸张推离堆叠,然后监控传感器以确定纸张是否通过延迟压区。 当传感器在预定时间长度内无法检测到纸张时,发生卡纸状况。 作为响应,控制器将延迟辊朝向进给辊移动以增加施加在片材上的驱动力。 延迟辊还适用于当多个片材接触延迟压区时检测多张纸的出现。 作为响应,控制器使延迟辊远离进给辊移动,但与进料辊保持接触,以减小施加在片材上的驱动力,从而允许各个片材自由通过。