Abstract: A system for retaining stacks of loose-leaf papers in a file folder providing random access to any one sheet is disclosed. The system includes flexible retainer strips sized to fit through perforated holes in the paper and whose ends are configured to releasably couple to form enclosure rings. The ends are securely engaged by relative twisting and inserting of one into the other. A series of adjustment apertures along the length of the retainer allows the formation of varying sizes of enclosure rings. Loops secured to the file folder receive the retainer strips thus holding the paper stack to the folder. The loops are positioned proximate an edge of the folder and pivotally mounted with a rotational axis aligned with the edge so as to rotate from one side of the folder to the other. The front or back side of any sheet in the stack may thus be displayed flat for photocopying or other purpose without removal from the retainer system.

Abstract: A pair of flexible retainer strips each of which can be held in ring configuration by a head and socket at opposite ends of the strip which interlock to retain a stack of perforated sheets in a file folder. Each retainer strip is slidably mounted in a separate guide channel formed in an anchor element securable to the cover of a file folder. The ends of the strip can be readily uncoupled to enable the insertion in or removal of a sheet at any location in the stack without having to remove any of the remaining sheets of the stack from the retainer strip.