Ring binder

Binder device releasably engaging aperture or notch of sheet – Sheet retainer travels arcuate path – Travel in plane perpendicular to axis of rotation

Patent

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Details

402 42, B42F 304

Patent

active

059757850

ABSTRACT:
A ring binder comprising a substantially rigid curved upper casing structure supporting a pair of plate, and the plates are pivotally movable between a first position in which the angle between the upper surfaces of the plates is less than 180.degree., and a second position in which the angle between the upper surfaces of the plates is more than 180.degree., a lock to lock the pair of plates and triggers or a pair of half-ring members to operate the lock, and the lock acts at a first location on the ring binder and the triggers or pair of half-ring members act at a second location on the ring binder, the first location being longitudinally distal on the ring binder from said second location.

REFERENCES:
patent: 4571108 (1986-02-01), Vogl
patent: 5346325 (1994-09-01), Yamanoi et al.
patent: 5718529 (1998-02-01), Chan

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