Qiao Qiao Dong

US Patent:

6444019, Sep 3, 2002

Filed:

Jun 10, 1999

Appl. No.:

09/329232

Inventors:

Wan Kang Zou - Lake Bluff IL
Xiaomang Wang - Lake Bluff IL
Carrie Woodcock - Park Ridge IL
Qiao Qiao Dong - Carol Stream IL
Fengfei Xiao - Northbrook IL

Assignee:

Videojet Technologies Inc. - Wood Dale IL

International Classification:

C09D 1100

US Classification:

106 314, 106 3158, 106 3172, 106 3186

Abstract:

The present invention provides a jet ink composition comprising a volatile organic solvent, an oil, one or more binder resins which are soluble in the volatile organic solvent, and a colorant. The ink composition is fast drying and provides excellent adhesion to non-porous substrates. Printers, such as drop-on-demand ink jet printers, employing the ink composition can operate without nozzle clogging even after long non-printing intervals. The present invention further provides a method for reducing clogging of a nozzle orifice in an ink jet printer comprising printing with an ink composition that includes an oil that forms a continuous oil phase which acts as the boundary layer between the air outside the nozzle orifice and the ink inside the nozzle during non-printing intervals. The present invention further provides a process for jet ink printing onto a substrate comprising projecting a stream of ink droplets of the ink composition of the present invention to the substrate and controlling the direction of the droplets so that the droplets form the desired printed image on the substrate.

US Patent:

58006010, Sep 1, 1998

Filed:

Mar 14, 1997

Appl. No.:

8/814987

Inventors:

Wan Kang Zou - Northbrook IL
Mohammed W. Siddiqui - Carol Stream IL
Fengfei Xiao - Mount Prospect IL
Arsenia C. Morelos - Glendale Heights IL
Jose G. Vega - Chicago IL
Qiao Qiao Dong - Northbrook IL
Josephine Aguilar - Elk Grove Village IL

Assignee:

Videojet Systems International, Inc. - Wood Dale IL

International Classification:

C09D 1102
C09D 1108

US Classification:

106 3165

Abstract:

The present invention provides jet ink compositions that are free or substantially free of sedimentation, have good image adhesion and rub resistance, and that are suitable for printing messages on food items such as fruits, vegetables, chocolate, candies, confectioneries and pharmaceuticals such as tablets, and other edible or ingestible materials. The jet ink compositions comprise a surface modified or coated colorant. The surface modified or coated food grade colorant comprises a food grade colorant of particle size in the range of from about 0. 01 micron to about 25 microns, a colorant carrier, and a surface modifying or coating agent. The surface modifying or coating agent comprises at least one binder resin, and preferably two or more binder resins.

US Patent:

59816252, Nov 9, 1999

Filed:

May 2, 1996

Appl. No.:

8/642700

Inventors:

Wan Kang Zou - Northbrook IL
Xiaomang Wang - Northbrook IL
Qiao Qiao Dong - Northbrook IL

Assignee:

Videojet Systems International, Inc. - Wooddale IL

International Classification:

C09D 1110

US Classification:

523161

Abstract:

The present invention provides a newspaper printing ink that has rub off resistance; is fast drying on the paper; does not mist or dry on the press; offers excellent printability, high color strength, good water balance, and sharp half tone reproduction; and is relatively inexpensive. The present invention provides an ink concentrate suitable for preparing the printing ink, the ink concentrate comprising a colorant having a particle size of from about 0. 01. mu. m to about 25. mu. m, a hydrocarbon resin, and a binder resin selected from the group consisting of a polyamide-oil polymer and a polyester-oil polymer. The present invention further provides a printing ink comprising a colorant having a particle size of from about 0. 01. mu. m to about 25. mu. m, a vegetable oil, a polyamide-oil polymer, and a styrene-acrylic copolymer.

US Patent:

61403911, Oct 31, 2000

Filed:

Oct 9, 1998

Appl. No.:

9/169734

Inventors:

Wan Kang Zou - Lake Bluff IL
FengFei Xiao - Northbrook IL
Carrie Woodcock - Park Ridge IL
Shannon Palk - Elmhurst IL
Qiao Qiao Dong - Carol Stream IL

Assignee:

Marconi Data Systems Inc. - Wood Dale IL

International Classification:

C08G 400
C08G 1602
C08G 1604
B32B 2742
C09D 1110
C08K 507
C08L 6100
C08L 6702

US Classification:

523160

Abstract:

The present invention provides a jet ink composition suitable for application onto a substrate comprising an ink carrier, a colorant, a polyol, an aldehyde-based cross-linking agent, and a catalyst that promotes a reaction between the cross-linking agent, the polyol, and the substrate. The present invention further provides a process of jet ink printing onto a substrate comprising projecting a stream of ink droplets to said substrate, controlling the direction of the droplets so that the droplets form the desired printed image on the substrate, and heating the image to obtain a cured printed image. Examples of preferred cross-linking agents are modified melamine formaldehyde resin and modified urea formaldehyde resin. The substrates preferably possess carboxyl, hydroxyl, amide, or sulfhydryl groups. An example of a preferred substrate is cellulose.