Display devices
    22.
    发明授权

    公开(公告)号:US3568345A

    公开(公告)日:1971-03-09

    申请号:US3568345D

    申请日:1968-07-24

    申请人: GROSSE MAURICE

    发明人: GROSSE MAURICE

    IPC分类号: G09F11/12 G09F11/34 G09F11/32

    CPC分类号: G09F11/12 G09F11/34

    摘要: A DEVICE FOR DISPLAYING BOTH SIDES OF A SERIES OF POSTERLIKE SHEETS IN A CONTINUOUSLY REPEATED MANNER, THE SHEETS BEING POSITIVELY ENGAGED AND TRANSFERRED, ONE AT A TIME, AROUND A ROLLER FROM A VIEWING POSITION TO THE REAR OF A STACK OF THE SHEETS AND THE DEVICE INCLUDING ELECTRICALLYOPERATED DELAY MECHANISM TO GOVERN THE LENGTH OF VIEWING TIME FOR EACH SIDE OF EACH SHEET.