Registers – Records – Particular code pattern
Patent
1996-12-26
1998-09-29
Hajec, Donald T.
Registers
Records
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
Boku Kazutake
Okayama Hiroaki
Ono Shusuke
Tanaka Yasuhiro
Yamada Katsu
Frech Karl
Hajec Donald T.
Matsushita Electric - Industrial Co., Ltd.
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