Transparent tamper-indicating document overlay

Details Transparent tamper-indicating document overlay Transparent tamper-indicating document overlay

1989-09-19

1990-11-06

Watts, Douglas D.

Printed matter

Having revealable concealed information, fraud preventer or...

350105, 350106, 283117, 283 67, 283 74, B42D 1500, G02B 5128

Patent

active

049680633

ABSTRACT:
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 an image formed on 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.

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patent: 4763985 (1988-08-01), Bingham

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