Cine-video film transport apparatus
    3.
    发明授权
    Cine-video film transport apparatus 失效
    电影影片传送装置

    公开(公告)号:US5419506A

    公开(公告)日:1995-05-30

    申请号:US730539

    申请日:1991-07-16

    IPC分类号: G03B21/44 G11B15/43 G11B23/04

    CPC分类号: G11B15/43 G03B21/44

    摘要: Film transport apparatus for a cine-video system in which video signals are produced from film that is driven between supply and take-up reels. The film, which may be wound in A or B configuration on each reel, is threaded automatically about a film drive mechanism which transports the film from the supply reel, through a film gate to the take-up reel. Tensioning apparatus imparts tension to the film at the entry and exit of the film gate which, during the threading operation, causes the respective reels to rotate before film actually is transported therebetween. The direction in which each reel rotates to unwind film therefrom when tension is imparted serves to identify whether the film is wound in A or B configuration. Advantageously, a programmable processor controls the film transport speed in response to a user-actuated knob; and this same processor serves to detect when the film approaches its end on the supply or take-up reel.

    摘要翻译: 电影视频系统的胶片传送装置,其中视频信号由在供应和卷取卷轴之间驱动的胶片制成。 可以在每个卷轴上以A或B构造缠绕的胶片自动地围绕胶片驱动机构自动地旋转,该胶片驱动机构将胶片从供带盘传送通过胶片门到卷取卷轴。 张紧装置在胶片闸门的入口和出口处对胶片施加张力,在胶片操作期间,在胶片实际在其间传送胶片之前,导致相应的卷轴旋转。 当施加张力时,每个卷轴旋转的方向从其中退绕,用于识别胶片是以A或B构造卷绕的。 有利地,可编程处理器响应于用户致动的旋钮控制胶片传送速度; 并且该相同的处理器用于检测胶片何时在供应或卷取卷轴上接近其端部。