Abstract: A media folder or book binder provided with a rotor having elastic bands stretched between pins on its opposite ends has mounting brackets which are mechanically fastened to the spine of the folder. The brackets have trunnions facing inwardly toward the opposite ends of the rotor to journal the rotor. An important aspect of the invention is that each bracket is provided with a shroud which inhibits or prevents bands from disengaging with their supporting pins as a folded sheet is removed from or installed on the rotor under a strand of the band. In effect, winding-up of the bands during relative lateral movement of a sheet still occurs, but the adverse twisting affect of enabling the bands to slip off pins is prevented. The folder has straps fixed thereto and preferably formed integrally therewith at opposite ends of the folder's spine. These straps interact with latches on the mounting brackets to firmly hold the brackets in place mechanically.

Abstract: A binding system for loose-leaf sheets of paper that securely retains the paper and provides facile removal and addition of paper bound by the system is provided. The system provides a variable width binding, for addition and removal of papers, and a flexible spine. A plurality of resilient connecting members extend arcuately between first and second backing members, when the system is in an open position. The connecting members extend through openings in an adjustment assembly coupled to the second backing member. The adjustment assembly is provided for simultaneously increasing and decreasing the length of the connecting members, and for maintaining the connecting members at different desired lengths for binding paper with the system or removing paper from the system. Paper having a plurality of slots is positioned on a cover, with a connecting member extending through each slot.

Abstract: A holder for holding a plurality of sheets formed with holes adjacent at least one of their edges, comprising: a backing member; at least one slide slidable along each end of a track extending along the width of the upper end of the backing member; and a cord or pair of cords carried by at least one slide and receivable through the openings of a plurality of sheets. The cords include mating connectors at one end to permit the plurality of sheets to be secured together, while the opposite ends of the cords are secured to a length-varying device enabling the effective lengths of the cords to be varied according to the number of sheets to be secured by the cords. In one described embodiment, the length-varying device is a "Velcro" hook and loop fastener; and in a second described embodiment, it is a reel.