Abstract: A binder of the ring type includes fixed and pivot rods with their free ends being bent in opposite relation. The pivot rods are attached to a pivot plate. The pivot plate is mounted on a bottom plate in such a manner that it is always biased by a spring in its opening direction. A pivot arm is provided, including an upper member and a lower member formed by bending a metal material. The pivot and bottom plate are clamped between the upper and lower members. To prevent excessive pivot movement of the pivotal arm, a stopper means is provided at the extremity of the pivot end of the pivot arm.

Abstract: The present loose leaf binder consists of two main sections each provided with spaced half rings and held together by means of metal links or a length of suitably bent metal wire. Between the two main sections of the binder there is an elongated strip selectively movable to open and close complementary pairs of the binder half rings. The free ends of the complementary pairs of half rings are duly fitted with protruding extensions which overlap when the binder is closed.

Abstract: An arrangement is provided for retaining loose sheets of paper. A pair of sheet retaining components, each having a plurality of half loops, are hingedly held together by wire clips. An actuator is interposed between the sheet retaining components. The actuator is provided with inclined slots which, when the actuator is displaced, engage and move the clips causing one sheet retaining component to move with respect to the other to unlock the engaged ends of the respective half loops. Once unlocked, the sheet retaining components can be hinged apart to permit removal and/or addition of loose leaf paper.

Abstract: The looseleaf binder ring assembly disclosed herein consists of a one-piece backbone formed of a resilient plastic material, which backbone has a plurality of pairs of cooperating fingers pivotally mounted thereon. The fingers of each pair face one another and are movable between open and closed positions with respect to each other; they are mounted in the backbone in specially formed recesses which prevent inadvertent removal of the fingers from the backbone. A slidably mounted actuator bar is provided in the backbone and has cam surfaces formed thereon for respectively opening and closing the fingers when the slide bar is moved between first and second positions. The cam surfaces respectively hold their associated fingers in opened or closed positions in accordance with the position of the slide bar.

Abstract: The looseleaf binder ring assembly disclosed herein consists of a one-piece backbone formed of a resilient plastic material, which backbone has a plurality of pairs of cooperating fingers formed thereon. The fingers of each pair face one another and are movable between open and closed positions with respect to each other. A slidably mounted actuator bar is provided in the backbone and has cam surfaces formed thereon for respectively opening and closing the fingers when the slide bar is moved between first and second positions. The cam surfaces respectively hold their associated spring fingers in their opened or closed position in accordance with the position of the slide bar.