Transparent overlay for protecting a document from tampering

Details Transparent overlay for protecting a document from tampering Transparent overlay for protecting a document from tampering

G - Physics

09

F

283/20, 117/6

G09F 3/03 (2006.01) B41M 5/52 (2006.01) B41M 7/00 (2006.01) B42D 15/00 (2006.01) B42D 15/10 (2006.01) G09F 3/04 (2006.01)

Patent

CA 2023569

A transparent overlay that can protect a document from tampering has a transparent cover sheet, a layer of hot-melt adhesive over one surface of the transparent cover sheet, and a polymeric image-receiving layer over the exposed face of said hot-melt adhesive layer. The transparent cover sheet can be a simple thermoplastic film but preferably is retroreflective sheeting which can bear a pattern or legend that is noticeable only when viewed retroreflectively. When the polymeric image-receiving layer is dye-receptive, it can be imaged by using a thermal printing head with a dye-donor element. A preferred polymeric image-receiving layer that is dye-receptive is chlorinated poly(vinylchloride).

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