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US4374627A Binder for perforated sheets or the like 失效
穿孔板等的粘合剂

Binder for perforated sheets or the like
摘要:
A two part binder for perforated sheets or the like in which a toothed binder member is provided with a constant opening through which sheets are moved for binding engagement with and disengagement from the teeth of the binder member. Another member closes the opening and has tracks for frictional engagement with the sides of the opening to prevent separation of the members in response to the application of the separating force.
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