Security binding

Details Security binding Security binding

1989-12-29

1991-03-05

Bell, Paul A.

Books, strips, and leaves

Book, element thereof, or accessory therefor

Binding

281 151, 281 211, 402 54, 402 80R, 402 48, 412 6, 412 7, 412 43, B42D 116, B42D 1312, B42F 300

Patent

active

049972081

ABSTRACT:
A security binder for positively and permanently securing a plurality of sheets of thin material having apertures along one edge, wherein one or more backbone elements are provided with lateral projecting members each having angled projections permitting entry of the members into spaced apertures but preventing removal therefrom; a preferred embodiment incorporates rectangular apertures on a multiple of 0.5625 inch centers with a multiplier of 2 or more and the angled projections extend from the projecting members in a direction longitudinal of the one edge.

REFERENCES:
patent: Re28202 (1974-10-01), Abildgard
patent: 1485431 (1924-05-01), Parker
patent: 2201551 (1940-05-01), Welk
patent: 3879783 (1975-04-01), Giulie
patent: 3970331 (1976-07-01), Giulie
patent: 4175880 (1979-11-01), Muller
patent: 4309046 (1982-01-01), Giulie
patent: 4433929 (1984-02-01), Jones
patent: 4620724 (1986-11-01), Abildgaard et al.
patent: 4625996 (1986-12-01), Hymmen
patent: 4647306 (1972-03-01), Chamberlin
patent: 4730972 (1988-03-01), Sun et al.
patent: 4743048 (1988-05-01), Groswith, III

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