Patents by Inventor Bobby D. Duncan

Bobby D. Duncan 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: 5262110
    Abstract: Apparatus and method are disclosed for spinning filaments from a material such as cellulose acetate dope. The filaments are spun from a spinnerette at the top of a vertically elongated spinning cabinet. Gas is first directed parallel to the filaments as they are spun. A short distance down the cabinet, gas is directed radially inwardly toward the filaments. The two flows of gas merge and flow parallel to the filaments to the bottom of the cabinet, where the gas is withdrawn radially outwardly from the filaments.
    Type: Grant
    Filed: July 31, 1992
    Date of Patent: November 16, 1993
    Assignee: Eastman Kodak Company
    Inventors: Albert E. Spaller, Jr., C. Kit Begley, Robert G. Casper, Shen S. Chen, Bobby D. Duncan, Glen R. Keith, Junior H. Landes II, Andrew E. McLeod
  • Patent number: 4610060
    Abstract: Drafting system for textile yarns and including a driven feed roll, a driven output roll, a low friction freely rotatable heated roll located between the driven feed roll and the driven output roll and operating at essentially the same surface speed as the driven feed roll, the freely rotatable heated roll being driven by engagement with the yarn and whereby sufficient yarn tension automatically is transferred upstream of the freely rotatable heated roll to pretension the yarn before it contacts the freely rotatable heated roll with drafting taking place near the location where the yarn leaves the freely rotatable heated roll to pass toward the driven output roll.
    Type: Grant
    Filed: November 21, 1985
    Date of Patent: September 9, 1986
    Assignee: Eastman Kodak Company
    Inventors: Bobby M. Phillips, Bobby D. Duncan