Closure mechanism for a loose-leaf holder

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

1988-09-26

1989-05-23

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

048325210

ABSTRACT:
A closure mechanism for a loose-leaf holder for sheets defining holes along an edge thereof comprises a base plate, fixed prongs for receiving the holes of the sheets carried by the base plate, interconected prongs pivotal between a closed position wherein they cooperate with the fixed prongs and an open position, a connecting element carrying the pivotal prongs, and a spring held in the connecting element of the pivotal prongs and having a free end portion of the spring supported on the base plate, the spring biasing the pivotal prongs into the open position.

REFERENCES:
patent: 2519932 (1950-08-01), Rostoker et al.
patent: 2871711 (1954-02-01), Stark
patent: 2894400 (1954-07-01), Bonn

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