Loose leaf binder assembly and spine therefor

Details Loose leaf binder assembly and spine therefor Loose leaf binder assembly and spine therefor

1996-03-19

1997-12-02

Fridie, Jr., Willmon

Binder device releasably engaging aperture or notch of sheet

Sheet retainer travels arcuate path

Travel in plane perpendicular to axis of rotation

402 31, 402 26, 402 36, B42F 304

Patent

active

056928475

ABSTRACT:
The improved loose leaf ring binder assembly includes a binder having a central vertical back portion connected to laterally extending wings or side portions which form the front and back covers of the binder. The assembly also includes a vertically extending spine connected to the front surface of the back portion. The spine is in the form of a hollow tube having closed upper and lower ends and containing a spaced pair of vertical rods. The inner ends of half rings are connected to the rods at spaced intervals along the length thereof. The half rings extend laterally outwardly from the rods through openings on opposite sides of the tube. The free ends of the half rings on one side of the tube are adapted to mate with half rings from the opposite side of the tube to form complete rings to releasably hold loose perforated sheets in place in the binder. The rod secured to the half rings on one side of the spine is vertically biased by a spring in the tube to facilitate fitting the free ends of the half rings together to form complete rings. In one embodiment, the half rings on one side of the spine are locked against rotation, as by fixedly connecting in the tube the rod to which they are connected. In another embodiment, a sleeve which can be screwed into and out of contact with the spring biased rod end can releasably lock the rings shut or open. The pair of rod and half rings can be identical, in some embodiments.

REFERENCES:
patent: 880053 (1908-02-01), Troussell
patent: 1129891 (1915-03-01), Morden
patent: 1163766 (1915-12-01), Morden
patent: 2013552 (1935-09-01), Dawson
patent: 3135266 (1964-06-01), Bouhier
patent: 3255759 (1966-06-01), Dennis
patent: 3791059 (1974-02-01), Shneider
patent: 4607970 (1986-08-01), Heusinkveld
patent: 5393156 (1995-02-01), Mullin et al.

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