Ring mechanism

Details Ring mechanism Ring mechanism

1987-12-30

1989-03-07

Bell, Paul A.

Binder device releasably engaging aperture or notch of sheet

Sheet retainer travels arcuate path

Travel in plane perpendicular to axis of rotation

B42F 304

Patent

active

048101257

ABSTRACT:
A ring mechanism has a cover rail, and a pair of carrier rails nested in side by side relationship between the side edges of the cover rail. Ring elements are mounted on the carrier rails, and the carrier rails can be moved between open and closed over center positions. To lock the carrier rails, a locking member is provided. In one position, it permits free movement of the carrier rails. In a locking position, it engages the carrier rails to prevent them being moved from the closed over center position, thereby preventing opening of the ring elements.

REFERENCES:
patent: 959183 (1910-05-01), Trussell et al.
patent: 1575591 (1926-03-01), Newman
patent: 2760490 (1956-08-01), Schadf

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