Patent ID: 6179507
Filing Date: 2001-01-30
Classification: B42F

Abstract:
A permanently locking ring binder for loose-leaf papers, said binder comprisinga housing having lateral edges,a pair of hinged plates confined within the housing between said edges,a plurality of ring segments affixed to each of said plates, said ring segments being arranged so that, when the plates are in one position, the ends of the ring segments are spaced apart and one can insert loose-leaf papers over the segments, and a second position, in which the ends of opposing ring segments meet, forming closed rings for retaining the papers, andat least one initially inactive lock affixed to the housing which can be activated once papers have been placed in the binder, to prevent movement of the rings to their open position, which lock cannot be deactivated,said lock comprising a body extending through the housing and a plunger movable within the body to a depressed permanently latched position wherein the bottom surface of the plunger rests just above the inner edges of the plates thus preventing the blades from moving.