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    • 1. 发明授权
    • Air density adaptive vacuum controller
    • 空气密度自适应真空控制器
    • US4662622A
    • 1987-05-05
    • US631968
    • 1984-07-18
    • Guenther W. WimmerDavid B. Kreitlow
    • Guenther W. WimmerDavid B. Kreitlow
    • G03G15/01B41J13/22G03G15/00H04N1/08B65H3/12
    • H04N1/0856H04N1/08
    • A vacuum media capturing and retention system for a drum type printer or recorder is disclosed. The apparatus includes a vacuum drum with two regions of vacuum passages, one for capturing the leading edge of the media and the second for retaining the trailing edge of the media. When the leading edge of the media is initially captured the vacuum level in the drum is at one level. After the leading edge of the media is captured the vacuum level is dropped to a lower level until the trailing edge of the media is captured. Following the capture of the media trailing edge, the vacuum level within the drum is again increased to retain the media thereto during the copying or recording operation of the overall device.
    • 公开了一种用于鼓式打印机或记录器的真空介质捕获和保持系统。 该设备包括具有两个真空通道区域的真空鼓,一个用于捕获介质的前缘,另一个用于保持介质的后缘。 当介质的前缘最初被捕获时,鼓中的真空度处于一个水平。 在捕获介质的前缘之后,将真空度降低到较低的水平,直到捕获介质的后缘。 在捕获介质后缘之后,在整个装置的复制或记录操作期间再次增加滚筒内的真空度以将介质保持在其上。