Binder device releasably engaging aperture or notch of sheet – Depository
Patent
1987-01-27
1988-05-31
Bell, Paul A.
Binder device releasably engaging aperture or notch of sheet
Depository
281 29, 412 3, B42F 1300, B42D 300, B42C 700
Patent
active
047477210
ABSTRACT:
A loose-leaf notebook (10) including a spine (12) on which a ring assembly (14) with openable rings (18) is mounted includes front and back cover flaps (22,24) of plywood with a generally uniform thickness in the range of about 0.08 to 0.18 of an inch. The plywood cover flaps (22,24) provide a lightweight, high strength, rigid construction and each has an outer exposed wood surface (28) that facilitates writing on the notebook as well as providing an aesthetically appealing appearance. A hinge (30) of the notebook is preferably embodied by a flexible hinge strip (38) such as adhesive backed decorative vinyl that secures the front and back cover flaps (22,24) to the spine (12) for movement between open and closed positions.
REFERENCES:
patent: 121671 (1871-12-01), Shannon
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patent: 3175847 (1965-03-01), McKowen
patent: 3686061 (1972-08-01), Brown et al.
patent: 3773604 (1973-11-01), Desai et al.
patent: 4441950 (1984-04-01), Lolli
patent: 4571109 (1986-02-01), Lapertosa
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