Patents by Inventor Darryl E. Rozelle

Darryl E. Rozelle 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).

  • Method of joining plastic preforms to encapsulate an article
    Patent number: 6120719
    Abstract: A method and apparatus are presented for encapsulating an article comprising, for example, a substantially circular turntable (12) having first and second opposed major surfaces (16 & 18), each major surface sharing an outer peripheral sidewall (20). First and second thermoplastic pre-forms (28 & 30) are fitted to sandwich the article and are sealed to encapsulate by rotating a thermoplastic band (32) onto and around the exposed seam (48) while applying pressure (70) and heat (74) to obtain a fused bonded reliable encapsulating joint (72). The method and apparatus presented are particularly well suited for encapsulating metal platens, holders, and internal parts of process equipment used in the semiconductor manufacturing industry to avoid contamination from the encapsulated metal.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: September 19, 2000
    Assignee: FSI International, Inc.
    Inventors: Darryl E. Rozelle, Vernon H. Gothman, Michael R. Baxter