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1. 发明授权

US3638967A Loose leaf ring binder 失效
标题翻译：松香圆环绑带
公开(公告)号：US3638967A
公开(公告)日：1972-02-01
申请号：US3638967D
申请日：1970-10-13
申请人： SANDERSON FILMS INC
发明人： MULLINS DONALD L
IPC分类号： B42F13/40 , B42D3/18
CPC分类号： B42F13/402
摘要： A loose leaf ring-type binder which also functions as a rigid viewing stand for a plurality of pages or flipover cards. The two covers of the binder include offset leg portions terminating at the hinge points with the back of the binder. When the covers are folded back at a certain angle, the leg portions of the covers are brought into juxtaposed contact with the back of the binder thereby restricting any movement of the back about the two hinge points to provide a rigid support for the cards carried in the binder.
摘要翻译：一种松散的叶环型粘合剂，其也用作多页或翻转卡的刚性观察台。粘合剂的两个盖子包括终止于与粘合剂背面的铰链点处的偏移腿部分。当盖子以一定角度折回时，盖子的腿部与粘合剂的背面并置接触，从而限制背部围绕两个铰链点的任何运动，以为携带的卡片提供刚性支撑粘合剂。

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