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2. 发明授权

US4852821A Spool for web-shaped film 失效
标题翻译：网状薄膜线轴
公开(公告)号：US4852821A
公开(公告)日：1989-08-01
申请号：US237027
申请日：1988-08-29
申请人： Clark E. Harris , Randy Armbruster , Michael Decker , Bradley A. Phillips
发明人： Clark E. Harris , Randy Armbruster , Michael Decker , Bradley A. Phillips
IPC分类号： G03B17/30 , G03C3/00
CPC分类号： G03B17/30 , G03B2217/261
摘要： A spool for holding photographic film, consisting of a core member provided with flanges between which flexible film may be wound and an elongated slot into which the end portion of a film strip may be entered and fastened. Adjacent the flanges are raised shoulders extending about the circumference of the core and above the core surface. The shoulders each gradually increase in thickness in the film-winding direction and terminate in a stepped portion corresponding to the thickness of the film. In a preferred embodiment, shoulder portions accommodate the edge portion of a full-width film, have an initial height above the surface level of said spool, and then rise gradually to an additional height approximately equal to the thickness of the film. When the full-width portion of the film is juxtaposed the spool flanges, said shoulders provide the film with a substantially level transition surface for each convolution of the full-width film, thereby avoiding imperfections on the spool-core surface.
摘要翻译：一种用于保持照相胶片的卷轴，其由设置有柔性膜可以被缠绕的凸缘的芯构件和可以进入并固定胶片条的端部的细长狭缝组成。相邻的凸缘是围绕芯的圆周延伸并且在芯表面上方的升高的肩部。肩部各自在膜卷绕方向上的厚度逐渐增加，并且终止于对应于膜的厚度的阶梯部分。在优选实施例中，肩部容纳全宽度薄膜的边缘部分，具有高于所述线轴表面高度的初始高度，然后逐渐升高至大约等于薄膜厚度的附加高度。当薄膜的全宽度部分与卷轴凸缘并列时，所述肩部为全卷膜的每个卷绕提供了基本上水平的过渡表面，从而避免了卷轴芯表面的缺陷。

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