Patents by Inventor Alfred I. Tsong Pan

Alfred I. Tsong Pan 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).

  • Laser ablated nozzle member for inkjet printhead
    Patent number: 5305015
    Abstract: In one of the preferred embodiments, an inkjet printhead includes a nozzle member formed of a polymer material that has been laser-ablated to form tapered inkjet orifices. The nozzle member is then mounted to a substrate containing heating elements, each heating element being associated with a single orifice. In a preferred method, the orifices are formed by Excimer laser ablation.In other aspects of the invention, vaporization chambers as well as ink channels, providing fluid communication between an ink reservoir and the orifices, are also formed by Excimer laser ablation.
    Type: Grant
    Filed: April 2, 1992
    Date of Patent: April 19, 1994
    Assignee: Hewlett-Packard Company
    Inventors: Christopher A. Schantz, Eric G. Hanson, Si-Ty Lam, Paul H. McClelland, William J. Lloyd, Laurie S. Mittelstadt, Alfred I. Tsong Pan