Abstract: A folder includes a spine having a base and first and second spine hinge portions. The spine defines a longitudinal axis and has an exterior surface that is curved around the longitudinal axis. The folder also includes a first cover having a first cover hinge portion pivotably attached to the first spine hinge portion. The first cover has a first curved portion with an exterior surface that is curved around the longitudinal axis. The folder further includes a second cover having a second cover hinge portion pivotably attached to the second spine hinge portion. The second cover has a second curved portion with an exterior surface that is curved around the longitudinal axis. The spine and the first and second curved portions together define a generally rounded contour around the longitudinal axis when the folder is in a closed position.

Abstract: A folder includes a spine having a base and first and second spine hinge portions. The spine defines a longitudinal axis and has an exterior surface that is curved around the longitudinal axis. The folder also includes a first cover having a first cover hinge portion pivotably attached to the first spine hinge portion. The first cover has a first curved portion with an exterior surface that is curved around the longitudinal axis. The folder further includes a second cover having a second cover hinge portion pivotably attached to the second spine hinge portion. The second cover has a second curved portion with an exterior surface that is curved around the longitudinal axis. The spine and the first and second curved portions together define a generally rounded contour around the longitudinal axis when the folder is in a closed position.

Abstract: A folder that has a spine that is hinged to two covers. The preferred covers have a convex portion that extends around a binding mechanism over most of the distance of that the binding mechanism protrudes inwardly from the spine support portion that extends outwardly with respect to a portion of the cover pivotably attached to the spine. A concave portion is located adjacent the convex portion towards the free end of the binder. The preferred folder portion of the binder has projections that are deformed through openings in the binding mechanism to secure the binding mechanism to the folder. A preferred cover has an arcuate cross-section extending parallel to the hinges.

Abstract: A folder that has a spine that is hinged to two covers. The preferred covers have a convex portion that extends around a binding mechanism over most of the distance of that the binding mechanism protrudes inwardly from the spine. support portion that extends outwardly with respect to a portion of the cover pivotably attached to the spine. A concave portion is located adjacent the convex portion towards the free end of the binder. The preferred folder portion of the binder has projections that are deformed through openings in the binding mechanism to secure the binding mechanism to the folder. A preferred cover has an arcuate cross-section extending parallel to the hinges.

Abstract: A binder insert with a folder portion and a clip. The folder portion defines at least one ring aperture configured and dimensioned to receive and mount to rings of a binder. The folder portion also has a first sheet defining a clip-mounting aperture and a second sheet facing the first sheet. The clip includes first and second clip portions resiliently biased toward each other. The clip is mounted to the first sheet through the clip-mounting aperture, and the first and second clip portions are disposed in a clamping position on the exterior of the first and second sheets and compressively engaged against the sheets to bias them against each other.

Abstract: A folder that has a spine that is hinged to two covers. At least one of the covers has a support portion that extends outwardly with respect to a portion of the cover pivotably attached to the spine. The support portion is located between the hinged portion and another portion disposed opposite therefrom.

Abstract: A portfolio for holding items such as sheets of paper is constructed a single sheet of translucent material having a scored line to act as a hinge and divided the material into front and back covers. The portfolio is provided with at least three pockets constructed of transparent material welded onto the portfolio. Two of the pockets are provided on the interior of the front and back covers for retaining sheets of paper, and a third pocket is provided on the exterior surface of the front cover for holding a sheet of material such as a cover label. The pockets may be provided with cutouts to allow expansion of the pockets and stress relief structures to prevent tearing of the pockets upon repeated insertion and removal of items from the pockets. The portfolio also includes a plurality of holes for attachment in a ringed binder and slits running from the holes to the hinge to permit insertion of the portfolio into the binder without opening the rings.