Ring binder

Details Ring binder Ring binder

1991-07-23

1992-08-04

Bell, Paul A.

Binder device releasably engaging aperture or notch of sheet

Sheet retainer travels arcuate path

Travel in plane perpendicular to axis of rotation

402 41, B42F 1316

Patent

active

051353237

ABSTRACT:
A locking ring binder assembly has a resilient sheet metal cover and a pair of operating levers rotatably mounted on the covers. A projection on the operating levers beneath the cover and a leg portion on the operating levers in alignment with the projection through a thickness of the cover locks the binder in a closed position even though the operating levers are not rotated to an over center position.

REFERENCES:
patent: 1857287 (1932-05-01), Schade
patent: 1953981 (1934-04-01), Trussell
patent: 2056812 (1936-10-01), Unger
patent: 2105235 (1938-01-01), Schade
patent: 2673564 (1954-03-01), Derringer
patent: 3098490 (1963-07-01), Wance
patent: 3101719 (1963-08-01), Vernon
patent: 3884586 (1975-05-01), Michaelis et al.
patent: 4813803 (1989-03-01), Gross

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