Patents by Inventor Qiao Qiao Dong

Qiao Qiao Dong has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6444019
    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.
    Type: Grant
    Filed: June 10, 1999
    Date of Patent: September 3, 2002
    Assignee: Videojet Technologies Inc.
    Inventors: Wan Kang Zou, Xiaomang Wang, Carrie Woodcock, Qiao Qiao Dong, Fengfei Xiao
  • Patent number: 6140391
    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. The cross-linking reaction is carried out at relatively moderate temperatures and at high speeds.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: October 31, 2000
    Assignee: Marconi Data Systems Inc.
    Inventors: Wan Kang Zou, FengFei Xiao, Carrie Woodcock, Shannon Palk, Qiao Qiao Dong
  • Patent number: 5981625
    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. The present invention further provides a printing ink comprising a naphthenic oil, a colorant having a particle size of from about 0.01 .mu.m to about 25 .mu.
    Type: Grant
    Filed: May 2, 1996
    Date of Patent: November 9, 1999
    Assignee: Videojet Systems International, Inc.
    Inventors: Wan Kang Zou, Xiaomang Wang, Qiao Qiao Dong
  • Patent number: 5800601
    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.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: September 1, 1998
    Assignee: Videojet Systems International, Inc.
    Inventors: Wan Kang Zou, Mohammed W. Siddiqui, Fengfei Xiao, Arsenia C. Morelos, Jose G. Vega, Qiao Qiao Dong, Josephine Aguilar