Binder device releasably engaging aperture or notch of sheet – Miscellaneous – Sheet lifters
Patent
1988-10-05
1990-03-13
Watts, Douglas D.
Binder device releasably engaging aperture or notch of sheet
Miscellaneous
Sheet lifters
402 57, 281 31, B42F 1300, B42F 1304, B42D 300
Patent
active
049079050
ABSTRACT:
A notebook adapted for replacement of leaves has a helical binding coil disposed along a coil axis; a first cover leaf defining apertures along a binding edge; a second cover leaf defining apertures along a binding edge adjacent the binding edge of the first cover leaf; multiple leaves having coinciding apertures along associated edges, the spacing between apertures of the first and second cover leaves and the multiple leaves corresponding generally to spacing between turns of the coil; and an elongated handle element associated with one end of the coil and extending transverse to the coil axis. The handle element is adapted for rotation about the coil axis to advance the binding coil along the axis for engaging and disengaging the coil in apertures of the leaves. The handle may be secured to a cover leaf with the binding coil engaged in the apertures.
REFERENCES:
patent: 1516932 (1924-11-01), Staab
patent: 1970285 (1934-08-01), Douvry
patent: 2051738 (1936-08-01), Ottinger
patent: 2061675 (1936-11-01), Schade
patent: 2228355 (1941-01-01), Key
patent: 2299715 (1942-10-01), Tauber
patent: 2327941 (1943-08-01), Tauber
patent: 2602251 (1952-07-01), Friedman
patent: 3526415 (1970-09-01), Freundlich
patent: 4120517 (1978-10-01), Staats
patent: 4629349 (1986-12-01), Pitts
patent: 4636179 (1987-01-01), Gentile et al.
Heyrana Sr. Paul M.
JLF Designs, Inc.
Watts Douglas D.
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