Loose leaf binder

Claim 1

A binder formed from a single sheet of material comprising front and back covers and a spine disposed therebetween and about the center line of which said covers swing in opening and closing the binder, a plurality of fastening means formed integrally from one of said covers and each comprising a thin narrow bendable strap of substantially uniform width throughout its length and having its root located adjacent to said spine and extending transversely away from said spine center line and terminating in an enlarged tab, a plurality of openings disposed in said spine adjacent to the center line thereof and having at least a portion thereof clear of that portion of the spine which lies between said center line and the other of said covers, whereby swinging movement of said other cover about said spine center line does not alter the distance between the roots of said straps and said opening portions, said openings being in aligned relation with said fastening means and being adapted to accept the passage of the tabs of said fastening means therethrough with a substantial portion of said fastening means constituted by said straps forming loops extending between said strap roots and said opening portions to accommodate a plurality of sheets of loose leaf material for free sliding movement therealong while permitting said covers to be opened about the center line of said spine into co-planar relation, said binder presenting further openings for receiving and holding said strap tabs against accidental removal to prevent accidental withdrawal of said fastening means from said first mentioned openings.