Patents by Inventor Robert F. Parks

Robert F. Parks 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).

  • Plastic bobbin or quill
    Patent number: 3993265
    Abstract: A quill or bobbin for holding a supply of yarn wound thereon in overlapping layers having an elongated barrel and an enlarged butt end integral therewith. The entire quill is molded utilizing a mixture of thermoplastic material and a blowing agent. A substantial portion of the barrel is solid and has a hardened surface with a less dense interior center core defined by set microscopic bubbles. An axial bore extends through the butt end of the quill and a dense hardened interior surface encompasses the bore.
    Type: Grant
    Filed: March 17, 1975
    Date of Patent: November 23, 1976
    Assignee: Steel Heddle Manufacturing Company
    Inventor: Robert F. Parks