Ring binder with dual angle ring metal

Details Ring binder with dual angle ring metal Ring binder with dual angle ring metal

1997-08-12

1999-09-28

Fridie, Jr., Willmon

Binder device releasably engaging aperture or notch of sheet

Sheet retainer travels arcuate path

Travel in plane perpendicular to axis of rotation

402 36, 402 32, 402 34, 402 35, 402 38, 402 41, 402 42, 402 26, 402 39, B42F 304

Patent

active

059576111

ABSTRACT:
A ring binder (10) holding sheets (S) of paper (P) has a dual angle ring metal (100). The ring metal includes a pair of leaves (102, 104) hingedly connected to each other for relative movement between them. Binder rings (114, 116, 118) each include a pair of ring halves with one end of each ring half being attached to a separate one of the leaves. A shield (30) covers the leaves. Release levers (140, 142) at each end of the shield are operable to open and close the binder. The leaves, when the ring binder is closed, form a predetermined angle (A) with respect to each other. Each of the leaves has a segment (122a, 122b, 124a, 124b) by which a second angle (B) is formed between the leaves. This second angle is formed such that the pair of leaves are prevented from movement relative to each other by movement of paper from one side of the binder to the other. However, the plates are readily movable to open the binder by movement of one of the release levers.

REFERENCES:
patent: 3098490 (1963-07-01), Wance
patent: 4552478 (1985-11-01), Cohen
patent: 5116157 (1992-05-01), Gillum et al.
patent: 5286128 (1994-02-01), Gillum
patent: 5476335 (1995-12-01), Whaley
patent: 5755525 (1998-05-01), Chan

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