Mario A Acitelli

US Patent:

45405956, Sep 10, 1985

Filed:

Oct 7, 1982

Appl. No.:

6/433311

Inventors:

Mario A. Acitelli - Charlotte NC
Richard F. Tynan - Charlotte NC
Alan R. Wayson - Concord NC

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

B41M 314
B44F 112
B05C 1100

US Classification:

427 7

Abstract:

An ink that fluoresces in the near infrared is used to mark documents such as bank checks for automatic identification. Markings with this ink are reliably detectable, even in the presence of other markings commonly found on such documents. The preferred fluorescent material of our invention is a phenoxazine dye 3,7-BIS(diethylamino) phenoxazonium nitrate.

US Patent:

50768433, Dec 31, 1991

Filed:

Oct 27, 1989

Appl. No.:

7/427409

Inventors:

Mario A. Acitelli - Charlotte NC
Charles J. Merz - Charlotte NC
Frank M. Rose - Kannapolis NC
John C. Smith - Huntersville NC

Assignee:

Lexmark, International, Inc. - Lexington KY

International Classification:

C09D 1102

US Classification:

106 22

Abstract:

The present invention provides nonaqueous thermaljet ink compositions having improved print uniformity, drying time, and waterfastness. The nonaqueous thermaljet ink compositions of the present invention are formulated by combining a solvent dye colorant and two or more miscible nonaqueous solvents, at least one being volatile and one being nonvolatile. More specifically, the solvents are combined in such relative concentrations that drying time is reduced when the composition is thermaljet printed onto a substrate and solubility of the dye is not seriously compromised when the volatile solvent evaporates.