Ring binder

Details Ring binder Ring binder

1983-12-29

1986-03-25

Spruill, Robert L.

Binder device releasably engaging aperture or notch of sheet

Resilient sheet retainer requiring deflection for sheet removal

Releasably attached to keeper

402 21, 402 19, B42F 302, B42F 1302

Patent

active

045779856

ABSTRACT:
A ring binder having flexible ring elements for holding sheets of paper or the like in an organized manner. The binder includes a backplate integrally coupled to a number of ring elements by a living hinge to allow flexing of the ring elements to and from a locked position. The ring elements each include a flanged end which is inserted into an entrance of a keyway, then pushed past a narrow neck to a locked position. Movement of the ring away from this locked position to the entrance is inhibited by a camming surface defined by the backplate.

REFERENCES:
patent: 2321558 (1943-06-01), Trussell
patent: 2321559 (1943-06-01), Trussell
patent: 2321560 (1943-06-01), Trussell
patent: 2322177 (1943-06-01), Trussell
patent: 2323285 (1943-06-01), Trussell
patent: 2459541 (1949-01-01), Russell
patent: 3313303 (1967-04-01), Beyer
patent: 3313304 (1967-04-01), Beyer
patent: 3529900 (1970-09-01), Pettit
patent: 3950107 (1976-04-01), Seaborn
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