Loose leaf binder and backing construction for notebooks

Claim 1

A LOOSE LEAF NOTEBOOK CONSTRUCTION FOR LOOSELY HOLDING SHEETS OF NOTEBOOK PAPE FORMED WITH RING APERTURES THEREIN, SAID NOTEBOOK COMPRISING FRONT AND BACK COVER MEMBERS, BINDING MEANS FOR CONNECTING THE COVER MEMBERS IN HINGED RELATIONSHIP, A RIGID BACKING STRUCTURE SECURED AT THE INSIDE OF THE BINDING MEANS AND INCLUDING A SLOTTED BASE AND A RETAINING CAP, A PLURALITY OF BINDER RINGS HAVING ANNULARLY SHAPED TONGUE EXTREMITIES ENGAGED IN THE SLOTTED BASE AND ADJUSTABLY SUPPORTED BY MEANS OF THE SAID RETAINING CAP AND EACH OF SAID RINGS INCLUDING A PAIR OF FLEXIBLE RING SECTIONS HELD UNDER TENSION AND NORMALLY ACTING TO MOVE AWAY FROM ONE ANOTHER, SAID FLEXIBLE RING SECTIONS BEING SUPPORTED FOR LIMITED FLEXING MOVEMENT BY SAID RETAINING CAP AND EACH PAIR OF FLEXIBLE RING SECTIONS INCLUDING A SLOTTED RECEIVER RING SECTION AND A KEYIN RING SECTION, THE SLOTTED RECEIVER SECTION BEING FORMED AT ITS UNDERSIDE WITH A CONICALLY RECESSED SEATING SURFACE AND THE KEYING RING SECTION BEING SHAPED WITH A CONICAL SURFACE WHICH MATES WITH THE CONICAL RECESSED SURFACE, SAID KEYING RING SECTION HAVING A WEB PORTION EXTENDING