Binder device releasably engaging aperture or notch of sheet – Sheet retainer travels arcuate path – Travel in plane perpendicular to axis of rotation
Patent
1980-01-08
1982-10-05
Bell, Paul A.
Binder device releasably engaging aperture or notch of sheet
Sheet retainer travels arcuate path
Travel in plane perpendicular to axis of rotation
402 70, 402 80R, B42F 1322, B42F 1336
Patent
active
043525822
ABSTRACT:
A loose leaf binder for apertured loose leaves comprises a pair of hinged plastic back sections having a substantially angular cross section, and a cover pivotally connected to each of said back sections. An elongated metal plate which is rigidly secured to each of said back sections is provided with a plurality of arcuate prongs lying in planes substantially perpendicular to the hinge axis. The binder also comprises a locking member and an elongated, slidable latch member for interengagement with said locking member. Means are provided for manually displacing said latch member in its longitudinal direction between a locking position and a release position against the action of spring means for resiliently biasing the latch member towards its locking position. At least one of said arcuate prongs is secured to said metal plate nearer, and extends at a smaller radial distance from, the hinge axis of said hinged back section than the other prongs. Said one arcuated is being positioned for engagement with and abutment against an edge of said loose leaves, whereas the other arcuate prongs are positioned for passage through the apertures of the apertured loose leaves.
REFERENCES:
patent: 1618769 (1927-02-01), Martin
patent: 2135943 (1938-11-01), Kornahrens
patent: 2246763 (1941-06-01), Schlosser
patent: 2421799 (1947-06-01), Martin
patent: 2528866 (1950-11-01), Dawson
patent: 2865377 (1958-12-01), Schroer
patent: 2891553 (1959-06-01), Acton
patent: 3884586 (1975-05-01), Michaelis
Bell Paul A.
Brown John S.
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