Patents by Inventor Sven Bertil Kvarnegard

Sven Bertil Kvarnegard 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).

  • Apparatus for thermographic duplication of information comprising a curve or cam member for axial movement of dye carrier
    Patent number: 4039832
    Abstract: An apparatus for duplicating information from a master provided with information, such as text lines or the like, comprising a drum rotatable in a stand, to which drum the master is applied, and the master during rotation of the drum is exposed to directed heat radiation from one or more heat radiators and supplied to a dye-carrier rotating synchronously with the drum, which carrier comprises a dye-carrying web, the dye of which adheres to the master in agreement with the information applied thereon, unprepared copy receiving sheets are then contacted with the master and subsequently removed therefrom.
    Type: Grant
    Filed: September 1, 1976
    Date of Patent: August 2, 1977
    Assignee: AB Carl Lamm
    Inventor: Sven Bertil Kvarnegard