Abstract: A dual purpose pouch, laminated under heat and pressure to provide permanent sealed protection for a permanent identification card and a protective receptacle for a temporary identification card, is cut from a sheet of transparent plastic having a hard, smooth outer surface layer and an inner adhesive layer; the blank comprises a first panel larger than either card, a second panel smaller than the first panel but at least as large as the temporary card, and a third panel of the same size as the first panel, the second and third panels being joined along first and second fold lines to different edges of the first panel.

Abstract: An improved foldable sheet plastic construction, employed in a butterfly pouch for use in making plastic laminated data cards, and in a plastic fan-fold product, both comprising adjacent panels made from a single sheet of plastic material that must be folded along a fold line into parallel facing relation. The fold line has a two-level hinge cut. A major portion of the fold line is cut to a predetermined depth that assures easy folding but may cause separation of adjacent panels; a minor fractional portion of the fold line is cut to a substantially shallower depth to preclude separation of the panels on folding. In the preferred construction, the shallow cut is made at two or more spaced locations along the fold line to provide plural hinges.

Abstract: A method for controlling curl in laminating a protective film having a heat-softenable adhesive surface onto a relatively flexible substrate document, in which the adhesive surface of the film is heated, the film and the substrate are then passed between two pressure rolls, and the laminate thus formed is maintained in contact with the pressure roll that engages the substrate through an appreciable arcuate distance after the laminate clears the other pressure roll to control longitudinal curl. The pressure rolls engaging the substrate and the film may be of convex and concave configuration, respectively, to minimize transverse curl. Radiant heating is preferably employed, together with limited pigmentation in the adhesive portion of the film.