Snap on device for hardcover ring binder

Details Snap on device for hardcover ring binder Snap on device for hardcover ring binder

1984-02-06

1986-02-11

Bell, Paul A.

Binder device releasably engaging aperture or notch of sheet

Miscellaneous

Sheet lifters

281 45, B42F 900, B42D 1700

Patent

active

045696136

ABSTRACT:
The snap on device having a U-shaped support with a pair of arcuate footers in the channel of the U-shaped support and a pair of grippers on each side of the U-shaped support adjacent the arcuate footers creates a device capable of being snapped onto a hard cover ring binder and equalizing the thickness of the binder from its spine to its opening side.

REFERENCES:
patent: 763554 (1904-06-01), Greene
patent: 1197314 (1916-09-01), Wells
patent: 1337612 (1920-04-01), Miller
patent: 1891814 (1932-12-01), Haskin
patent: 3374564 (1968-03-01), Balaban
patent: 3861101 (1975-01-01), Whisson
patent: 3944374 (1976-03-01), Young et al.
patent: 4229918 (1980-10-01), Delcroix
patent: 4486032 (1984-12-01), Leahy

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