Substrate having colored indicia thereon for read-out by infrare

Details Substrate having colored indicia thereon for read-out by infrare Substrate having colored indicia thereon for read-out by infrare

1973-11-19

1976-01-20

Coughenour, Clyde I.

Printing

Antismut device

Anti-offset material application

35 9G, 106 23, 2091115, 229 68R, 235 6111E, 235 6112N, 250341, B07C 5342, G06K 712, B65D 2700

Patent

active

039330940

ABSTRACT:
In a method for making a business reply envelope having binary bar code indicia imprinted thereon for identification or read-out by infrared scanning apparatus, the steps of providing a plurality of printing inks, each of said inks being of a color which in combination with the envelope substrate yields a Print Contrast Signal substantially less than 50 percent when measured in the wavelength range of 800 to 900 nanometers as determined by the equation Print Contrast Signal = Rw-Rb/Rw .times. 100 wherein Rw is the percentage reflectance of the unprinted substrate of the envelope and Rb is the percentage reflectance of the printed area of the envelope, adding a material comprising a metallic compound to only one of said inks in quantity sufficient to increase the Print Contrast Signal of said one ink color and said substrate to at least 50 percent, imprinting at least said indicia on said substrate with said one ink, and imprinting further material on said substrate with the other of said inks.

REFERENCES:
patent: 2350893 (1944-06-01), Hofgaard
patent: 2546666 (1951-03-01), Fleischer
patent: 2612994 (1952-10-01), Woodland et al.
patent: 2751433 (1956-06-01), Linger
patent: 2784392 (1957-03-01), Chaimowicz
patent: 2936247 (1960-05-01), Francis et al.
patent: 3400156 (1968-09-01), Milionis et al.
patent: 3440257 (1969-04-01), Susi et al.
patent: 3462285 (1969-08-01), Thompson
patent: 3561003 (1971-02-01), Lanham et al.
patent: 3566120 (1971-02-01), Lane
patent: 3596062 (1971-07-01), Street et al.
patent: 3598964 (1971-08-01), Dell et al.
patent: 3705043 (1972-12-01), Zabiak

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