Abstract: A ring binder (100) has a center spine (102) and end leafs (104). A ring assembly (10) attaches to the spine includes a cover piece (12) and bolts (14, 16) on each of which are formed binder ring halves (18a-18b, 20a-20b, 22a-22b). The bolts are mounted on the cover piece and movement relative to each other to close and open the binder. A latching mechanism (50) formed on a distal end (44) of each ring half interlocks the ring halves together when the binder is closed. A guide finger (62) on each bolt aligns each bolt to the cover piece when the bolts are moved to close the binder rings, this action aligning the latching mechanism so the ring halves readily interlock with each other. A thumb pad (52) formed on each of the bolt releasably engages with the cover piece to lock the bolts in a binder ring closed position.

Abstract: A ring binder (100) has a center spine (102) and end leafs (104). The spine section has jaws (108) formed on each side which extend the length of the spine section. Each end leaf has one end (104a) insertable into one of the jaws and thereafter held in place by serrations (110) forming the jaws and which frictionally engage the one end of the leaf to keep it permanently in place. A binder ring assembly (10) includes binder rings (18-22) and a mechanism (14,16) for opening and closing the rings. The spine section includes rivets (72) integrally formed at each end of the spine section and the binder ring assembly includes a cover (12) having corresponding openings (68a,68b) for attaching the binder ring assembly to the spine section. This binder construction allows different width end leafs to be used with a common spine section to form a variety of different size binders using a common spine section.