Closure mechanism for a loose-leaf holder

Details Closure mechanism for a loose-leaf holder Closure mechanism for a loose-leaf holder

1988-09-01

1989-05-16

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

B42F 1320

Patent

active

048305286

ABSTRACT:
A closure mechanism for a loose-leaf holder for sheets defining holes along an edge thereof comprises a base plate having a stiffening rib extending along an edge of the base plate and flaps stamped out of the base plate and bent upwardly about a common axis. Fixed prongs for receiving the holes of the sheets are fastened to the base plate along an opposite edge of the base plate, and commonly pivotal prongs having a loop portion cooperate with the fixed prongs upon pivoting the prongs into engagement with the fixed prongs. A common carrier plate for the pivotal prongs defines slots receiving the base plate flaps with slight play, the common axis of the flaps extending substantially parallel to the stiffening rib and to a connecting line between the pivotal prongs whereby the common carrier plate with the pivotal prongs is mounted on the base plate for pivoting about the common axis, and the carrier plate has lugs projecting therefrom and facing the stiffening rib, the carrier plate lugs engaging slots in a side wall of the stiffening rib facing the carrier plate with slight play.

REFERENCES:
patent: 2519932 (1950-08-01), Rostoker et al.
patent: 2871711 (1959-03-01), Stark
patent: 2894400 (1959-07-01), Bonn

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