Code sheet representing multiple code information and method for

Details Code sheet representing multiple code information and method for Code sheet representing multiple code information and method for

1996-12-26

1998-09-29

Hajec, Donald T.

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Particular code pattern

235462, G06K 1906

Patent

active

058148060

ABSTRACT:
A plurality of types of ink having different wavelength characteristics are used for multiple printing of code information. When two or more types of ink are to be printed in an overlapping manner, in a region 8 in which one type of ink 4 and another type of ink 5 are printed in the overlapping manner, the ink 4 and the ink 5 are printed so as not to completely overlap each other by using a checkered pattern 9. As a result, the multiple printing can be performed without strict constraints on the wavelength characteristics of the ink.

REFERENCES:
patent: 3471684 (1969-10-01), Barezou
patent: 3473027 (1969-10-01), Freeman
patent: 3990043 (1976-11-01), Clark
patent: 4605846 (1986-08-01), Duret et al.
patent: 4889367 (1989-12-01), Miller

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