Binder device releasably engaging aperture or notch of sheet – Pliant – deformable sheet retainer – Secured by folded portion thereof
Patent
1976-10-08
1978-10-24
Schnall, Jerome
Binder device releasably engaging aperture or notch of sheet
Pliant, deformable sheet retainer
Secured by folded portion thereof
24 16PB, B42F 110, B42F 1310
Patent
active
041218922
ABSTRACT:
A holder for sheets such as sheets of paper with at least a pair of holes along one edge portion for receiving a pair of flexible locking tongues, which are made integral with a plastic strip having slits corresponding to the shape of the tongues for allowing the formation of the tongues, the latter being intended for bending up to a position substantially at right angles to the strip for introduction into the holes of the sheet, and into the appropriate openings of a locking strip having a bottom wall and side walls, for thereafter bending down over the bottom wall. A pair of riders are displaceable along the locking strip subsequently being moved into a position one over either tongue, for retaining it in a downwardly bent position. On its underside intended to be facing towards the bottom wall of the locking strip, each locking tongue is provided with locking teeth intended to engage with complementary locking teeth formed in the bottom wall of the locking strip. The distance between the bottom wall of the locking strip against which the tongue engages, and the underside of each rider is approximately equal to the thickness of the tongue so that the tongue is kept pressed against the locking strip for maintaining engagement between the locking teeth when the rider has been pushed over the respective tongue.
REFERENCES:
patent: 1850376 (1932-03-01), Brennan
patent: 2119843 (1938-06-01), Brennan
patent: 2536792 (1951-01-01), Wendt
patent: 3019486 (1962-02-01), Stinson
patent: 3285251 (1966-11-01), Ivory et al.
patent: 3747164 (1973-07-01), Fortsch
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