Abstract: A one piece binder for perforated sheets, including a base portion and at least a ring. The ring comprised two members which, when locked, present a smooth and continuous surface and, when unlocked, are spring-biased apart. The locking means on one ring member terminates in resilient guide and latching portions which are received in an apertured portion of the other member.

Abstract: A carrier (10) for holding a plurality of pages (2) including a support member (13) and at least one ring (12) extending therefrom that includes a lower retention finger (20) of substantially uniform thickness and a flexible upper finger (21) of decreasing thickness. The fingers (20, 21) have free ends (22, 24) adjacent to each other and a flexible tang (25) at the free end of the flexible upper finger is positioned along one or more rigid tangs (26) at the free end of the lower retention finger.

Abstract: The booklet has a refillable binder in which there are writing sheets and opened envelope-forming sheets with a gummed perimeter region bound to the cover by demountable binding rings passing through slots in a stub section. Each sheet and each envelope is separable from the stub section by a perforated tear line. The sheets, as well as the envelopes, are provided with embossed fold lines such that with a sheet lying on an envelope, the folding of the sheet and the folding of the envelope about the sheet can be done simultaneously. Sheet and envelope are torn in assembled form from the binder in a single tearing motion along a perforated line. Another perforated line is provided along one end of the envelope for opening after it is sealed.Also described is a plastic binding ring which is made up of two identical halves of extruded plastic having interlocking butt joints which snap together.

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: A ring binder comprising a hollow spine divided into a stationary portion and a pair of movable portions integrally interconnected to one another through the intermediary of longitudinally extending scored folding lines. The two movable portions carry ring halves for movement toward and away from one another into closed and opened positions respectively. The movable portions are movable together with one another toward and away from the stationary portion into two extreme at-rest positions for opening and closing the ring halves.

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.