Trigger mechanism for ring binder

Details Trigger mechanism for ring binder Trigger mechanism for ring binder

1987-10-05

1989-03-21

Yost, Frank T.

Binder device releasably engaging aperture or notch of sheet

Sheet retainer travels arcuate path

Travel in plane perpendicular to axis of rotation

402 37, 402 41, B42F 1320, B42F 304, B42F 1326

Patent

active

048138037

ABSTRACT:
A loose-leaf sheet binder mechanism with a case, hinge plates, ring halves and trigger lever to operate the hinge plates for opening and closing the ring halves. The case has first lock means on it in the form of a raised or dimpled member and the trigger lever has complementary second lock means on it.

REFERENCES:
patent: 2041168 (1936-05-01), Dawson
patent: 4571108 (1986-02-01), Vogl

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