Patents by Inventor Seppo Pukkinen

Seppo Pukkinen 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).

  • Calender, in particular a supercalender with multiple relief devices
    Patent number: 5038678
    Abstract: The invention concerns a calender, in particular a supercalender, on whose frame (1) a set of rolls (2) is mounted, which comprises an upper roll (3), a lower roll (4), and several intermediate rolls (5) placed between the upper roll and the lower roll. The rolls (3, 4, 5) are supported on the frame (1) by the intermediate structure of the base parts (34, 47, 54) being vertically displaceable along guides (7) provided in the frame. Of the base parts, at least the base parts (54) of the intermediate rolls can be positioned in the vertical direction by means of lifting spindles (6) provided in the frame (1) and by means of spindle nuts (56) provided on the spindle. The base parts (54) of the intermediate rolls are supported on the lifting spindles (6) being vertically displaceable by means of pressure-medium operated relief devices (57) arranged between the base parts (54) and the spindle nuts (56) to reduce the journal loads on the rolls (5).
    Type: Grant
    Filed: December 27, 1989
    Date of Patent: August 13, 1991
    Assignee: Valmet Paper Machinery Inc.
    Inventors: Juha Honkala, Wilhelm Landin, Timo Hirvonen, Seppo Pukkinen, Ari Lassila