Loose leaf binder

Details Loose leaf binder Loose leaf binder

1988-10-17

1989-12-12

Watts, Douglas D.

Binder device releasably engaging aperture or notch of sheet

Miscellaneous

Sheet lifters

402 29, 402 42, 402 43, B42F 300, B42F 1300, B42F 500, B42F 1320

Patent

active

048863904

ABSTRACT:
The invention is directed to a loose leaf type ring binder having two long sides and a designated top and bottom for temporarily attaching perforated papers or the like to a file or folder. A pair of rings are loosely attached to the file or folder near the designated top in a manner so that they are free to pivot relative to the sides of the folder through substantially 180 degrees to a position substantially parallel with the surface of the folder or file in either direction of pivot. The opening through the center of the rings being positioned perpendicular to the designated top and bottom. Each of the rings are split and provided with a hinge so that the rings can be opened at the split to receive perforations in the papers to the attached thereto. The rings include a locking device at the ends of the split to prevent unwanted opening of the rings at the split and stops to prevent circumferential rotation of the rings relative to the file or folder.

REFERENCES:
patent: 924492 (1909-06-01), Nicholson
patent: 1807390 (1931-05-01), Crosby
patent: 2909179 (1959-10-01), Robbins
patent: 2957477 (1960-10-01), MacLean

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