Paper binding device

Details Paper binding device Paper binding device

1998-04-17

1999-04-20

Fridie, Jr., Willmon

Binder device releasably engaging aperture or notch of sheet

Sheet retainer travels arcuate path

Travel in plane perpendicular to axis of rotation

402 31, 402 38, B42F 304

Patent

active

058951644

ABSTRACT:
A paper binding device includes a base, two binding ring assemblies, a pull plate, and a bottom plate. By causing the pull plate to displace forwardly and rearwardly in the center of the base, positioning pins on the pull plate may displace in corresponding guide slots of the binding ring assemblies to force the binding ring assemblies to open or close. The pull plate further has stop pieces that may firmly secure the binding ring elements in position when the binding ring assemblies are in a closed state. The pull plate effectively eliminates the problem of small open angle with conventional paper binding devices which make it difficult to bind papers.

REFERENCES:
patent: 2178546 (1939-11-01), Trussell
patent: 3135266 (1964-06-01), Bouhier
patent: 5788391 (1998-08-01), Cheung

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