Ring binding mechanism

Details Ring binding mechanism Ring binding mechanism

1987-08-24

1988-08-23

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

402 29, B42F 1320

Patent

active

047657685

ABSTRACT:
The ring binding mechanism includes one or more partial rings which are slidably mounted in arcuate tracks in a base plate member for rotational movement between a loading position wherein an opening between the ends of the rings is accessible to install or remove sheets of paper or the like and a loaded position wherein the opening is located beneath the surface of the base plate member. The tracks, base plate member and rings include parts which cooperate to releasably lock the rings in the loaded position. In one embodiment, the ring binding mechanism is installed on a one-piece cover including a spine section defined between laterally spaced hinged sections. The spine section is either mounted directly on the base plate member or sandwiched between the base plate member and a back plate member which are secured together with snap-in fingers. The binder can be transported in an unassembled condition and assembled at the point of use by the user.

REFERENCES:
patent: 779879 (1905-01-01), Sheridan et al.
patent: 2068229 (1937-01-01), Fahrnbuhl
patent: 3313303 (1967-04-01), Beyer
patent: 3313304 (1967-04-01), Beyer

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