Ring binder

Details Ring binder Ring binder

1992-09-24

1994-02-15

Rosenbaum, Mark

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 36, B42F 304

Patent

active

052861287

ABSTRACT:
A shield for a ring metal is provided having arcuate band sections at the locations of the rings and intermediate sections therebetween, the intermediate sections having a straight segmental cross section having a lower overhead clearance between the shield and the hinged leaves than the band sections. The hinged leaves abut the intermediate section before tab members formed on said hinged leaves can abut an underside of the band sections, thus upward dents are prevented on the shield. Additionally, the straight segmental configuration of the intermediate sections provides increased resiliency for opening and holding closed the rings of the ring metal.

REFERENCES:
patent: 959849 (1910-05-01), Forgerson
patent: 1299276 (1919-04-01), Whitlock
patent: 1481342 (1924-01-01), Blackwell et al.
patent: 1865098 (1932-06-01), Green
patent: 2017188 (1935-10-01), Tannehill
patent: 3270749 (1966-09-01), O'Connell
patent: 4368995 (1983-01-01), Cohen
patent: 4552478 (1985-11-01), Cohen
patent: 4624595 (1986-11-01), Ohminato
patent: 4798491 (1989-01-01), Lassle
patent: 4824434 (1989-06-01), Ferreira-Godinho
patent: 4828421 (1989-05-01), Arakaki
patent: 5106222 (1992-04-01), D'Amore

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