Abstract: A rivet assembly includes a tube with first and second ends and a spiral thread formed on an inner surface extending from the first end to a first axial extent, and a bolt formed to engage the tube thread to a second axial extent less than the length of the tube.

Abstract: A sheet protector includes a front panel and a back panel attached together to form a pocket and a margin. The pocket may have an opening extending along a top edge of the panels. The margin extends along a side of the pocket. The opening may extend a distance into the margin such that a width of the opening is greater than a width of the pocket. For example, the width of the opening may be at least about 2% greater than the width of the pocket. Alternatively, a sheet protector includes a sheet of material folded about a fold line to form the front panel and the back panel. The panels are welded together at a bottom weld line, an outer weld line located along one side, and at an inner weld line located in a spaced relationship from the outer weld line. A margin is defined between the outer and inner weld lines, and a pocket is defined between the panels and within the fold line, the bottom weld line, and the inner line, with an opening being defined along the top edges of the panels.

Abstract: A two-ply cover for a writing tablet is formed by a unitary die-cut blank of sheet material having an inner panel and an outer panel folded approximately along a medial fold line and sealed at their outer edges to form a pocket therebetween. The inner edge portions of the two cover panels are adhesively bonded to the back, upper edge portion of the tablet. The bonded edge portion of the outer panel corresponds to the width of the cover while the bonded edge portion of the inner panel consists of a tab substantially narrower than the cover. The tab and a fractional part of the outer panel's bonded edge portion are superposed with an adhesiver interface between the back of the writing tablet and the inner surface of the tab and the edge portions of the outer panel that are not coextensive with the tab.

Abstract: An expandable, multi-pocket envelope is disclosed which is formed by die-cutting, scoring and folding a unitary blank. The blank is formed from a resiliently flexible sheet material and includes a front, back and two intermediate panels. The panels are all foldable in superposed relation about spaced, parallel crease lines. The outer edge of one intermediate panel is cut to include an index tab. A slot is provided between the opposed adjacent edges of the front panel and the other intermediate panel and each of these opposed edges is cut to include an index tab. Inwardly foldable glue bearing panels are provided along the side edge portions of said blank and a closure flap is disposed on the outer end edge of the back panel.