Patents by Inventor David B. Pritchard

David B. Pritchard 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: 6585846
    Abstract: An apparatus and method provides for rotatably cutting and/or laminating layered structures or sheet material supported by webs. A rotary converting apparatus and method of the present invention converts a web comprising a cathode layered structure and a web comprising an anode layered structure into a series of layered electrochemical cell structures supported by a release liner. Employment of a rotary converting process of the present invention provides, among other benefits, for the creation of a product having a finished size, without need for downstream or subsequent cutting.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: July 1, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Eric J. Hanson, John R. Wheeler, Alan P. Miller, David B. Pritchard, Donald G. Peterson, John R. Jacobson, Jeffrey J. Missling, James N. Dobbs, David C. Kramlich
  • Patent number: 6547229
    Abstract: A product stacking apparatus and method employs one or more stations, each including a stationary stacking platform or a conveyor upon which spaced-apart pucks are coupled for travel thereon. A product delivery apparatus drives one or more movable webs to which segmented product sheets are removably affixed. The product delivery apparatus includes one or more rotatable lamination interfaces associated with each of the stations for transferring product sheets from the webs to the pucks on a repetitive basis to produce a stack of product sheets on the respective pucks. Each of the segmented product sheets may define all or a portion of an electrochemical cell, all or a portion of a pad including layers of film or sheet material, wherein a portion of each of the layers is provided with a bonding feature, or all or a portion of a pack comprising layers of medical dressing. A puck need not be in motion during the transfer of the product sheet from the lamination roll to the puck.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: April 15, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Eric J. Hanson, John R. Wheeler, Alan P. Miller, David B. Pritchard, Donald G. Peterson, John R. Jacobson, Jeffrey J. Missling, James N. Dobbs, David C. Kramlich