Browse Prior Art Database

Credit Card Signature Panel

IP.com Disclosure Number: IPCOM000082428D
Original Publication Date: 1974-Dec-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Herron, TF: AUTHOR

Abstract

It is desirable to prevent people from erasing the signature on credit cards. It is furthermore desirable to have a system whereby the signature can easily be placed on the card, and if attempts to erase it are made the word "VOID" appears. Shown is a credit card where this is accomplished utilizing a split-image formulation.

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Credit Card Signature Panel

It is desirable to prevent people from erasing the signature on credit cards. It is furthermore desirable to have a system whereby the signature can easily be placed on the card, and if attempts to erase it are made the word "VOID" appears. Shown is a credit card where this is accomplished utilizing a split- image formulation.

A split-image formulation is a technique whereby two layers of material are required in order to make an image. These layers of material include an encapsulated chemical and when the capsules in both layers are broken in one spot or line an image appears. This is accomplished as follows:

The VOID printing is protected by the standard lamination. Over the printed band is silk-screened a signature band, consisting of encapsulated particles forming one-half of a split-image formulation and enough pigment to mark the band opaque.

A transparent plastic, coated on the underside with the other half of the split- image capsules (no pigment) and slightly larger all around than the signature band, is heat sealed around the edges to the band.

In use, the card holder signs the band with a ball point pen, pencil, or stylus. This operation breaks the capsules under pressure and the resulting mixing creates an image which cannot be erased. The clear plastic protects the signature and, if removed, will damage the card due to the heat seal operation.

If the under coating is removed, the VOID will show and discourage the casual fo...