Ring mechanism for loose-leaf binders

Details Ring mechanism for loose-leaf binders Ring mechanism for loose-leaf binders

1980-09-23

1983-01-18

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

043689957

ABSTRACT:
A loose-leaf binder has a cover and a ring mechanism. The ring mechanism includes a resilient base plate with curled edges and at least one rib extending laterally and downwardly. The ring mechanism also includes a pair of blades beneath the base plate and between the curled edges, the combined width of the blades being slightly greater than the distance between the curled edges. Also, the blades each have at least one slot along their outside edge to engage the rib. At least one pair of ring members fixed to the blades extend above the base plate to meet in a releasable juncture.

REFERENCES:
patent: 1897001 (1933-02-01), Dawson
patent: 1915140 (1933-06-01), Watson
patent: 1932874 (1933-10-01), Adams et al.
patent: 2377179 (1945-05-01), Pitt
patent: 3263687 (1966-08-01), Weichert

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