Thermal transfer printing ribbon for printing security bar code

Details Thermal transfer printing ribbon for printing security bar code Thermal transfer printing ribbon for printing security bar code

1995-04-03

1996-10-22

Tran, Huan H.

Incremental printing of symbolic information

Thermal marking apparatus or processes

With transfer medium or driving means therefor

347221, B41J 3105, B41J 3108

Patent

active

055681778

ABSTRACT:
Thermal transfer printing ribbon for printing security bar code symbols wherein the thermal transfer printing ribbon has been overprinted or overcoated in specific predetermined locations with a coating which has magnetic recognition characteristics. The difference in printed bar code symbols is invisible to the human eye and bar-code scanning equipment, but can be readily detected using a device capable of recognizing a magnetic signal.

REFERENCES:
patent: 5047291 (1991-09-01), Talvalkar et al.

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