Binder device releasably engaging aperture or notch of sheet – Sheet retainer with separate aperture making device
Patent
1994-09-22
1996-07-16
Bryant, David P.
Binder device releasably engaging aperture or notch of sheet
Sheet retainer with separate aperture making device
402 7, 402 8, 83687, 83691, B42F 300, B26F 114
Patent
active
055360963
ABSTRACT:
Disclosed is a manual binding punch for scrap newspapers, cardboard, and similar recyclable sheet material for shearing a pair of holes through a stack of sheets whereby a plurality of stacks may be bound together with cotton cord to form a bundle. The manual binding punch comprises a punch apparatus having a fixed base portion with a die plate having a pair of spaced apart die apertures integrally formed thereon. A cantilevered lever arm has a pair of end punches for cooperative engagement with the die apertures, a return spring whereby the lever arm and end punches are urged away from the die plate, and a pressure plate whereby sheets being punched are held stationary during punching. The lever arm is pivotable between an open position wherein a stack of sheets may be positioned between the end punches and the die plate and a closed position wherein the pressure plates contact the stack to hold the sheets stationary while the end punches shear a pair of holes therethrough.
REFERENCES:
patent: 485102 (1892-10-01), Grantland
patent: 2200672 (1940-05-01), Kern
patent: 3001270 (1961-09-01), Friedman
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