Molded binder assembly

Details Molded binder assembly Molded binder assembly

1994-02-08

1995-02-28

Fridie, 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, 402 41, B42F 304

Patent

active

053931564

ABSTRACT:
Disclosed herein is a molded locking snap ring assembly for use in holding looseleaf sheets together as in a two or three-ring binder. The assembly is preferably a one-piece molded construction including an elongated longitudinal base section having upright retaining levers at each end, extending between two pivotally opposed ring support sections. Integral reduced cross section hinge sections joining the base and ring sections provide pivotal connection therein. The ring sections carry opposed ring segments for movement toward and away from one another into closed and open positions respectively. Integrally molded locking arms mounted at each end of the ring support sections carry free ends having oblique surfaces for contacting and pushing respective levers outward and projecting ledges having latching surfaces for latching with central channels defined in the levers. Offset ends of separated ring segment pairs and torsional spring members therebetween included in the ring sections provide tension to hold latching ledges in locked position in the latching channels.

REFERENCES:
patent: 710364 (1902-09-01), Maloney
patent: 1499294 (1924-06-01), Costello
patent: 2129109 (1938-09-01), Unger
patent: 2572305 (1951-10-01), Bloore
patent: 3348550 (1967-10-01), Wolf et al.

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