Binder device releasably engaging aperture or notch of sheet – Sheet retainer travels arcuate path – Travel in plane perpendicular to axis of rotation
Patent
1988-09-19
1989-07-18
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
281 33, 402 31, 402 79, 402 45, 402 70, 402 73, B42F 304, B42F 1316
Patent
active
048489484
ABSTRACT:
Looseleaf notebooks, presentation devices and similar stationery items incorporating a binder mechanism attached to the side of the rear cover. Three slots are present along the side of the front cover positioned so as to fit into the ring binder mechanism to lock the notebook and secure all contents. The ring binder itself may contain a stiff paper or plastic insert for providing additional support for use as a presentation device. Such insert may includes three projections along the bottom manufactured to fit into the front cover slots to convert the notebook into an easel stand. The stiff insert additionally may function as the third side during vertical positioning of the notebook thereby allowing for a stable free standing presentation device.
REFERENCES:
patent: 1094019 (1914-04-01), Reifel et al.
patent: 1723030 (1929-08-01), Gerard
patent: 4244660 (1981-01-01), Aronson
patent: 4573821 (1986-03-01), Gilreath
patent: 4623276 (1986-11-01), Kinneir
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