Loose leaf binder

Details Loose leaf binder Loose leaf binder

1978-11-06

1980-07-29

McQuade, John

Binder device releasably engaging aperture or notch of sheet

Sheet retainer travels arcuate path

Travel in plane perpendicular to axis of rotation

402 38, B42F 304

Patent

active

042148391

ABSTRACT:
Loose leaf binder composed of an arcuate back panel, pivotable cover panels and a toggle ring mechanism which is affixed to the inner concave surface of the back panel. The toggle mechanism includes spaced leaf ring members each composed of a pair of mating sections pivotable with the toggle mechanism between open and closed positions. Each ring member is defined by rectilinear leg portions extending outwardly of the toggle mechanism, upwardly and inwardly extending arm portions and transversely extending arcuate rail portions supported by the arm portions of the ring in spaced relation to the arcuate back panel. Each of the arm portions has a unidirectional slope and with a corner of generous radius fairs together with each rail portion, enabling the loose leaf sheets held on the rings to be smoothly swung from one side to the other of the binder.

REFERENCES:
patent: 1927802 (1933-09-01), McMillan
patent: 3132649 (1964-05-01), Gits

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