Convertible ring binder incorporating exchangeable covers and ri

Details Convertible ring binder incorporating exchangeable covers and ri Convertible ring binder incorporating exchangeable covers and ri

1990-10-23

1992-06-09

Bell, Paul A.

Binder device releasably engaging aperture or notch of sheet

Depository

Face member with back member

281 29, 281 36, 281 37, 402 74, B42F 1316, B42F 1300

Patent

active

051201496

ABSTRACT:
A convertible ring binder incorporates front and back covers that are detachable one from the other to enable exchange of the covers for new or different covers. Hook and loop material is utilized to effect detachable attachment of the covers. In another aspect, the ring structure utilized to store paper in the binder is detachably secured to the spine of a loose-leaf ring binder.

REFERENCES:
patent: 1191798 (1916-07-01), Labarre
patent: 1978383 (1934-10-01), Lundeen et al.
patent: 4444418 (1984-04-01), Goldstein
patent: 4681474 (1987-07-01), Wiberg

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