Printed paper identification system

Details Printed paper identification system Printed paper identification system

1998-05-15

2000-05-16

Lee, John R.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25055903, 25055939, 2505594, G06K 500

Patent

active

060640588

ABSTRACT:
The present invention relates to a printed paper identification system for identifying whether a printed paper is a falsified document. The system comprises a paper passage slot and a propeller for driving the printed paper through the passage slot, an identification mechanism having a plurality of light sources and a detecting device installed at two opposite sides of the passage slot, and a controller for actuating the propeller to carry the printed paper through the passage slot, having the detecting device to detect the lights emitted from the light sources and through a predetermined area of the printed paper and generate a correspondent detected signal for each of the light sources, forming one characteristic signal by using the detected signals according to a predetermined procedure, and comparing the characteristic signal with at least one pre-stored identification signal to determine whether the printed paper is a falsified document.

REFERENCES:
patent: 4592090 (1986-05-01), Curl et al.
patent: 4618257 (1986-10-01), Bayne et al.
patent: 4935628 (1990-06-01), Martin et al.
patent: 5367577 (1994-11-01), Gotaas
patent: 5889883 (1999-03-01), Simpkins
patent: 5923413 (1999-07-01), Laskowski

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