Binder device releasably engaging aperture or notch of sheet – Opposed sheet retainers involving relative rectilinear travel – With or including separable sheet transfer means
Patent
1976-08-11
1977-11-29
Schnall, Jerome
Binder device releasably engaging aperture or notch of sheet
Opposed sheet retainers involving relative rectilinear travel
With or including separable sheet transfer means
402 48, 402 64, B42F 502, B42F 1330
Patent
active
040603300
ABSTRACT:
A loose leaf binder having a pair of separable front and back cover members respectively hinged to relatively rigid interconnecting numbers of L-shaped cross-section adatped to be interfitted in overlapped relation to provide an expansible back for the binder. The L-shaped back-forming members are respectively provided with a lock post and a lock mechanism adapted to be interengaged by rectilinear insertion of the post into the lock mechanism, which latter is provided with a pair of coacting cylindrical rollers designed to frictionally engage and wedge therebetween opposite sides of the post inserted into the lock mechanism. One of said rollers is held rotatably captive in an axially fixed position while the other roller is movable into and out of wedging engagement with said lock post. The lock mechanism is provided with a swingable lever arm connected to a draw bar which acts to draw said movable roller out of its wedging engagement with the lock post, both the lever and the draw bar being normally biased by a single compression spring to hold said one roller in its wedged position against said post. The said roller is released from its wedging, i.e. post locking position, upon simple shifting of said lever in opposition to its biasing spring.
REFERENCES:
patent: 917610 (1909-04-01), Jones
patent: 1077639 (1913-11-01), Pitt
patent: 1349577 (1920-08-01), Nankervis
patent: 1393265 (1921-10-01), Cooper
patent: 1911801 (1933-05-01), Buchan
patent: 1972417 (1934-09-01), Buchan
patent: 2167685 (1939-08-01), Scherzinger
patent: 2553886 (1951-05-01), Vevier
patent: 2836182 (1958-05-01), Gramacy
Buchan Industries, Inc.
Schnall Jerome
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