Ring binder

Details Ring binder Ring binder

1997-03-14

1998-02-17

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 38, 402 41, B42F 304

Patent

active

057185298

ABSTRACT:
A ring binder is disclosed as comprising a substantially rigid curved upper plate supporting a pair of lower plates to which at least two pairs of half-ring members are mounted, the pair of lower plates being pivotally movable between a first position in which the half-ring members are closed, and a second position in which the half-ring members are open, and a lock to lock at least one of the pairs of half-ring members whilst closed, and the lock is supported by the curved upper plate between the two pairs of half-ring members.

REFERENCES:
patent: 3135266 (1964-06-01), Bouhier
patent: 3884586 (1975-05-01), Michaelis et al.
patent: 4571108 (1986-02-01), Vogl
patent: 5346325 (1994-09-01), Yamanoi et al.

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