File folder with integral loose leaf binder rings

Claim 1

A loose leaf folder comprising: (a) a unitary sheet of flexible plastic sheet material formed to include a pair of hinged cover panels; (b) said panels being struck at spaced locations adjacent the hinges thereof to provide a plurality of ring binder forming strips, each strip being attached to one of the panels at an inner end adjacent the hinges, said strip including a free end with an enlarged tip portion of arrowhead configuration; (c) the other of said panels having narrow slits parallel to the hinges and an aperture spaced outwardly of each slit, one such slit and panel aperture being disposed in registered alignment with each ring binder strip for receiving the enlarged tip thereof when the strips are reversibly bowed from one panel toward the other panel; (d) each of said slits having a length greater than the largest width of its associated arrowhead tip portion, whereby the tip portion may be readily fitted through the slit for easy insertion and removal therethrough; and (e) each of said apertures being substantially rectangular with two marginal edges being parallel to the slit, said aperture having a width less than said largest width of the arrowhead portion and a length less than the axial length of said arrowhead portion measured from arrowhead tip to arrowhead base, whereby the arrowhead tip portion may be quickly and easily fitted through the aperture and removably locked in place.