Loose-leaf binder and paper-punch combination

Details Loose-leaf binder and paper-punch combination Loose-leaf binder and paper-punch combination

1987-02-24

1988-06-07

Bell, Paul A.

Binder device releasably engaging aperture or notch of sheet

Sheet retainer with separate aperture making device

B42F 1340

Patent

active

047492970

ABSTRACT:
A loose-leaf binder has a paper punch which is actuated by the opening of the binder rings. The arms of the rings are attached to two hinge plates which pivot as the arms are opened and closed. Male and female punch die members on the underside of the hinge plates are brought together when the binder rings are opened, to punch a sheet of loose-leaf paper.

REFERENCES:
patent: 531887 (1895-01-01), Wilkes
patent: 956216 (1910-04-01), Spiro
patent: 1603538 (1926-10-01), Helfer
patent: 1623824 (1927-04-01), Bondeson et al.
patent: 2139159 (1938-12-01), Hammen
patent: 3349774 (1967-10-01), Ryan
patent: 3944373 (1976-03-01), Farjon et al.
patent: 3975105 (1976-08-01), Cline
patent: 4552478 (1985-11-01), Cohen

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