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7 条记录 (耗时 0.022 秒)

    Adjustable screen frame for rear projection screen or the like
    1.
    发明授权
    Adjustable screen frame for rear projection screen or the like 失效
    可调节屏幕用于后投影屏幕或类似

    公开(公告)号：US3583466A

    公开(公告)日：1971-06-08

    申请号：US3583466D

    申请日：1969-12-17

    申请人： POLACOAT INC

    发明人： DREYER JOHN F

    IPC分类号： G03B21/58 ,  A47G5/00

    CPC分类号： G03B21/58

    摘要： An adjustable screen frame assembly composed essentially of tubular members which are rectangular in cross section, the tubular members defining the corners legs, and side parts of the screen frame, the frame assembly including T-shaped sections which are telescopically received in the tubular parts and wedged into multiple point clamping engagement therewith by means of adjustment bolts, the frame forming parts being provided with means for readily attaching a screen or the like thereto.

    Method of making light polarizing patterns
    5.
    发明授权
    Method of making light polarizing patterns 失效
    制作光极化图案的方法

    公开(公告)号：US3658616A

    公开(公告)日：1972-04-25

    申请号：US3658616D

    申请日：1969-09-17

    申请人： POLACOAT INC

    发明人： DREYER JOHN F

    IPC分类号： B42D15/00 ,  B44C1/17 ,  B44C1/16

    CPC分类号： B44C1/1733 ,  B42D25/29 ,  Y10T428/24802

    摘要： Methods for making patterns comprising areas different with respect to their light polarizing properties by selective removal of portions of a continuous polarizing film, such as of a dichroic dye, from a carrier therefor to define all or a portion of said areas. Selective removal may be by destructive removal of the dye film from the carrier, or by transfer of portions thereof to a receptor surface.

    摘要翻译： 通过从其载体上选择性除去连续的偏振膜的一部分，例如二色性染料的部分，制造包括相对于其光偏振性不同的区域的图案的方法，以限定所述或所述区域的全部或一部分。 选择性去除可以通过从载体上破坏性去除染料膜，或者通过将其部分转移到受体表面。