Loose leaf binder

Details Loose leaf binder Loose leaf binder

1991-02-08

1991-12-31

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 34, 402 36, 402 80R, B42F 1320

Patent

active

050767224

ABSTRACT:
In a loose leaf binder the left (2a, 3a) and the right prong parts (2b, 3b) are each disposed on a common carrier plate (4). The carrier plates (4) are pivotably connected to a base plate (5) and can be depressed using a lever (8) against the force of coil springs (11) into a position in which they lie flat on the base plate. By pulling gently on the end of the catch (10) the binder is released and opens due to the force of the springs (11). Even in the opened state it is still possible to turn the sheets from one prong part to another without such turning being hindered by the lever.

REFERENCES:
patent: 2004570 (1935-06-01), Dawson
patent: 2789561 (1957-04-01), Bonn et al.
patent: 3083713 (1963-04-01), Meurer
patent: 3104667 (1963-09-01), Mintz
patent: 3153417 (1964-10-01), Newman
patent: 4349289 (1982-09-01), Cardelini

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