Binder device releasably engaging aperture or notch of sheet – Sheet retainer travels arcuate path
Patent
1981-12-31
1983-11-15
Kazenske, E. R.
Binder device releasably engaging aperture or notch of sheet
Sheet retainer travels arcuate path
402 41, B42F 1312
Patent
active
044152906
ABSTRACT:
A binder of the ring type includes fixed and pivot rods with their free ends being bent in opposite relation. The pivot rods are attached to a pivot plate. The pivot plate is mounted on a bottom plate in such a manner that it is always biased by a spring in its opening direction. A pivot arm is provided, including an upper member and a lower member formed by bending a metal material. The pivot and bottom plate are clamped between the upper and lower members. To prevent excessive pivot movement of the pivotal arm, a stopper means is provided at the extremity of the pivot end of the pivot arm.
REFERENCES:
patent: 2252926 (1941-08-01), Hanna
patent: 2318431 (1943-05-01), Sparks
patent: 2460718 (1949-02-01), Stevens
patent: 2715906 (1955-08-01), Lucchesi
patent: 3191605 (1965-06-01), Cott et al.
Brown John S.
Kazenske E. R.
King Jim Co. Ltd.
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