Binder device releasably engaging aperture or notch of sheet – Opposed sheet retainers involving relative rectilinear travel – Telescopic retainers with means to telescopically drive...
Patent
1986-12-04
1987-09-29
Bell, Paul A.
Binder device releasably engaging aperture or notch of sheet
Opposed sheet retainers involving relative rectilinear travel
Telescopic retainers with means to telescopically drive...
402 80R, B42F 302
Patent
active
046965955
ABSTRACT:
A loose leaf binder lift lock having a tubular body with a tapered front end, a tubular locking ball carrier mounted in the body and carrying a plurality of locking balls and movable between a ball locking position and a ball unlocking position, a retainer spring for releasably retaining the ball carrier in the tubular body in the ball locking position but permitting disassembly of the ball carrier from the body, a pull ring stud carried by the ball carrier, and a detachably mounted pull ring carried on the pull ring stud for moving the ball carrier to the ball unlocking position.
REFERENCES:
patent: 1869790 (1932-08-01), Wolf
patent: 2286060 (1942-08-01), Buenger et al.
patent: 2340129 (1944-01-01), Lazaroff
patent: 2472969 (1949-06-01), Guinane
patent: 2568227 (1951-09-01), Federbush
patent: 2724386 (1955-11-01), Schade
patent: 2730105 (1956-01-01), Pisciotto, Jr. et al.
patent: 4201492 (1980-05-01), Almgren
Bell Paul A.
Mentag Robert G.
South Park Sales & Mfg., Inc.
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