Binder device releasably engaging aperture or notch of sheet – Sheet retainer travels arcuate path – Travel in plane perpendicular to axis of rotation
Patent
1995-03-31
1997-08-26
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 41, 402 38, 402 26, B42F 304
Patent
active
056604904
ABSTRACT:
A ring metal for a ring binder having a pair longitudinally arranged leaves partially surrounded an clasped by a resilient metallic shield and a plurality of openable rings having base ends connected to the leaves such that relative angular orientation of the leaves corresponds to an open or closed condition of the rings. By shaping and arranging the rings with respect to the leaves such that the closed condition of the rings corresponds to the relative angular orientation of the leaves being 180.degree. or less measured on a side of the leaves opposite the rings, results in the rings always being urged to the open condition whether open or closed. At least one of the rings provides a hook formation to lock rings halves of at least one ring to lock the rings and leaves in the closed orientation.
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Fridie Jr. Willmon
U.S. Ring Binder Corporation
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