Perforator

Details Perforator Perforator

1974-02-08

1976-03-16

Schnall, Jerome

Binder device releasably engaging aperture or notch of sheet

Sheet retainer with separate aperture making device

30358, 83588, B42F 300

Patent

active

039443736

ABSTRACT:
A perforator of the kind having a die and a slidable punch for piercing holes in sheets of paper or similar documents intended to be placed in a file or binder with openable rings. The perforator is constructed so that it can be temporarily fitted to each ring of the file or binder for the purpose of piercing a hole accurately aligned with the ring.

REFERENCES:
patent: 1217870 (1917-02-01), Klaes
patent: 1292124 (1919-01-01), Stenquist
patent: 1567374 (1925-12-01), Keene
patent: 1665805 (1928-04-01), Walter
patent: 2105233 (1938-01-01), Schade
patent: 3275003 (1966-09-01), Chamberlin
patent: 3303564 (1967-02-01), Hendricks

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