Loose-leaf notebook construction

Details Loose-leaf notebook construction Loose-leaf notebook construction

1989-03-28

1990-06-05

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

402 42, 402 80R, B42F 1322

Patent

active

049309250

ABSTRACT:
The invention is a notebook having a cover and a selectively openable and closable binder mechanism which can support a plurality of pre-punched, loose-leaf sheets. The binder mechanism includes the following: (a) an elongated rigid plate; (b) a hollow tubular support channel including upper and lower portions fixed to the plate and in coaxial relation with one another; (c) an opposed pair of pivotable clam-shell sheet retainers which are cooperatively associated so as to define a closed, generally elongated cylindrical, sheet holder in a first radial position and an open split cylinder in a second radial position; (d) the clam-shell sheet retainers include a rod-like pivot which pivot is slidably mounted in the support channel for a limited axial movement between a first normally restrained position and a second normally unrestrained position; (e) a first spring which biases the pivot towards its first normally restrained position; (f) a second spring which radially biases the clam-shell sheet retainers apart towards their open position; and (g) a cam associated with the support channel and operative to force the clam-shell sheet retainers into their closed position.

REFERENCES:
patent: 743114 (1903-11-01), Trussell
patent: 804599 (1905-11-01), Harn
patent: 2715906 (1955-08-01), Lucchesi
patent: 2856660 (1958-10-01), Twohig
patent: 3280821 (1966-10-01), Dougherty

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