Abstract: A springy panel bridges the ring mechanism housing. It is mounted on the ring halves so that when the ring halves close they cam the panel up the lower curve of the segments, and bow the panel upward away from the ring mechanism housing cover. An element having an upward end cam surface for paper or for a sheet lifter is mounted through two holes in the element on a lower segment of a ring so that one end of the element is inside the ring adjacent to the ring mechanism cover, the other end is inside the ring, adjacent to a line through the widest horizontal portion of the closed ring, and the element bows out of the ring between the two ends.

Abstract: A ring capture mechanism of a loose-leaf binder includes a first plate having a U-shaped slot of continuous circumference designed to receive a ring of the binder through the slot within the circumference. The first plate moves across a second plate having a straight slot of continuous circumference designed to receive the ring of the binder, and locks the arms of a ring contained in both slots in the legs of the U-shaped slot.

Abstract: A die-cut sheet of material is folded in three and clamped by a ring binder mechanism so that two panels formed by the folding are pressed to a third panel that is between the folds, forming a binder cover leaf on each side of the mechanism. The ends of the folded panels are spaced from the fold lines, and may be fastened together to form a horizontal pocket, a vertical pocket, or horizontal and vertical pockets in both leafs.

Abstract: In an element for a book which includes a sheet having a slit configured for receiving an item through the sheet, the improvement includes the slit going to two folds of the sheet along fold lines that are transverse to the slit, the folds being at angles that are 90 degrees or less.

Abstract: A plurality of U-shaped springs are hingedly attached by the arms of the U to a pair of covers forming a hinge on each cover and a channel configured to receive an article in the channel through the hinges.

Abstract: A panel attached to a book on foldable extensions by which the panel can be positioned next to the book and at various heights within the book and maintain the same orientation at each position, has a slot configured to receive an object through the panel and an acute fold at each end of the slot transverse to the slot at the fold, blocking the end of the slot.

Abstract: A flexible sheet having the back coated with a glue is formed into panels which are folded back on themselves with at least one layer being the back glued to itself by the coating. In one embodiment the glue is an energy responsive adhesive, and energy is applied to the folded sheet while it is on a cover, so that a cover having the cover liner with reinforced pocket is made.