Patents Assigned to Wartsila-Appleton, Incorporated
  • Method and apparatus for temperature gradient calendering
    Patent number: 4606264
    Abstract: A web of paper or similar material is subjected to at least one nip formed by an iron roll and a compliant roll. The iron roll is heated to a temperature of at least the temperature at which the fibers in the web begin to deform. In the case of paper this is approximately 350.degree. F. Preferably the web is passed through two nips the first nip polishing one side of the web, the second nip polishing the other side. The result is a web having improved gloss without substantial loss of bulk and with minimum mottling.
    Type: Grant
    Filed: January 4, 1985
    Date of Patent: August 19, 1986
    Assignee: Wartsila-Appleton, Incorporated
    Inventors: Ronald D. Agronin, Paul J. Klemmer