Binder device releasably engaging aperture or notch of sheet – Sheet retainer travels arcuate path – Travel in plane perpendicular to axis of rotation
Patent
1975-09-10
1977-03-08
Schnall, Jerome
Binder device releasably engaging aperture or notch of sheet
Sheet retainer travels arcuate path
Travel in plane perpendicular to axis of rotation
402 75, 402 80R, B42F 1312, B42F 1320
Patent
active
040110184
ABSTRACT:
A linking arms mechanism for a prong type loose-leaf paper binder having spacer bars with recessed portions within which curved spaced prongs are fixed and integral raised shear stops are formed which cooperate with a hinge assembly.
REFERENCES:
patent: 693086 (1902-02-01), Trussell
patent: 1663430 (1928-03-01), Wirt
patent: 1670410 (1928-05-01), Hermann
patent: 2120659 (1938-06-01), Wedge
patent: 2791220 (1957-05-01), McBee
patent: 3748051 (1973-07-01), Frank
Friedman Norman
Roen Stephen A.
Rotella Robert F.
Royal Business Machines, Inc.
Schnall Jerome
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