Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
November 13, 2007
Patent Application Number
10901300
Date Filed
July 29, 2004
Patent Primary Examiner
Patent abstract
A ring binder mechanism has D-shaped rings formed by a straight, stationary part, and a movable mating part having an arcuate shape. A recess is formed in the tip of the movable part, and a protrusion at the tip of the stationary part seats in the recess. A lateral window in the recessed tip, intersecting the recess, enables the protrusion to seat smoothly in the recessed tip notwithstanding the fact that the relative motion between the approaching tips has a large lateral component.
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