利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

132 条记录 (耗时 0.011 秒)

    Suction film holder
    31.
    发明授权
    Suction film holder 失效
    吸膜夹

    公开(公告)号：US4378155A

    公开(公告)日：1983-03-29

    申请号：US251939

    申请日：1981-04-07

    申请人： Sven Nygaard

    发明人： Sven Nygaard

    IPC分类号： G03B27/32 ,  G03B27/60 ,  G03B27/64

    CPC分类号： G03B27/60

    摘要： A suction film holder preferably for a reproduction camera and comprising a plate with channels opening outwards and communicating with a suction means. The known suction holders comprise a plurality of concentric chambers mutually communicating through valves, only the intermediary chamber being connected to the suction source. The sheet in question may therefore neither be of an arbitrary size nor be arbitrarily located. According to the invention the channels uniformly dispersed across the entire plate are individually connected to the suction means through at least one valve, said valve closing when a heavy flow takes place and slightly opening when substantially the same pressure is present on both sides thereof. In this manner the sheet may have an arbitrary size and be arbitrarily located. A plurality of channels always open on to the back of the sheet, the valves of said channels slightly opening when substantially the same pressure is present on both sides of the valve, i.e. a low pressure retaining the sheet. The valves located in the channels opening on outside the sheet close.

    摘要翻译： 优选用于再现相机的吸膜保持器，并且包括具有向外开口并与抽吸装置连通的通道的板。 已知的抽吸保持器包括通过阀相互连通的多个同心室，只有中间室连接到抽吸源。 因此，所讨论的纸张既不具有任意尺寸也不能任意定位。 根据本发明，均匀分散在整个板上的通道通过至少一个阀独立地连接到抽吸装置，当大流量发生时，所述阀关闭，并且当其两侧存在大致相同的压力时略微打开。 以这种方式，片材可以具有任意尺寸并且任意定位。 多个通道总是打开到片材的背面，当在阀的两侧上存在基本相同的压力时，即所述通道的阀保持薄片，所述通道的阀门略微打开。 位于纸张外侧的通道中的阀门关闭。

    Photoplotter cassette
    33.
    发明授权
    Photoplotter cassette 失效
    照相机CASSETTE

    公开(公告)号：US3759613A

    公开(公告)日：1973-09-18

    申请号：US3759613D

    申请日：1971-05-05

    申请人： COMPUTERVISION CORP

    发明人： DENIS R

    IPC分类号： G03B27/60

    CPC分类号： G03B27/60

    摘要： A cassette adapted to be loaded with either or both photographic film or a glass plate for use in a light-tight photoplotter. The cassette has vacuum drawing means for holding the film on one side of the cassette and conventional means for holding the glass plate on the other side of the cassette. The cassette can be mounted in the photoplotter with either side facing the lens.

    摘要翻译： 一种适于装载照相胶片或用于不透光照相绘图仪的玻璃板的盒子。 盒具有用于将膜保持在盒的一侧上的真空拉丝装置和用于将玻璃板保持在盒的另一侧上的常规装置。 盒式磁带可以安装在摄影机中，任一侧面向镜头。