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abtastfenster with bernoulli effect

机译:具有伯努利作用的阿巴斯汀

摘要

A web flattening system for holding a filmstrip (web) or filmstrip and paper carrier combination (web) against the aperture of a linear array scanner. The foregoing is accomplished by providing: a platen having at least two orifices over which the bottom surface of a web moves; a plate that is positioned above the top surface of the web and the platen so that the bottom surface of the web will be positioned in close proximity to the orifices; and means for supplying a high velocity gas stream to the orifices so that a pressure differential will exist between the top and bottom surfaces of the web; whereby the pressure differential will push the bottom surface of the web towards the orifices and a thin layer of gas will form between the bottom surface of the web and the platen.
机译:一种用于将胶片(胶片)或胶片和载纸器组合(胶片)固定在线性阵列扫描仪孔径上的胶片展平系统。通过提供一种具有至少两个孔的压板来实现上述目的,板的底表面在孔上移动;以及一块板,其位于纤维网的顶表面和压板的上方,从而纤维网的底表面将定位成紧邻孔口;用于向孔口供应高速气流的装置,从而在纸幅的顶面和底面之间将存在压差。这样,压差将把纸幅的底面推向孔,并且在纸幅的底面和压板之间将形成一层薄薄的气体。

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