Patents by Inventor Karl T. I. Silja

Karl T. I. Silja 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).

  • Creping doctor with two suction chambers in the support beam
    Patent number: 5011574
    Abstract: A creping doctor (2) for creping a soft paper web (3) off a yankee cylinder (1) is described which comprises a supporting beam (4) disposed close to the envelope surface of the yankee cylinder (1) and provided with an internal space, the internal space being divided into a first longitudinal suction chamber (24) and a second longitudinal suction chamber (25). The creping doctor also produces a subatmospheric pressure in the suction chambers (24, 25); a first suction connection (18, 19, 21) connecting the first suction chamber (24) of the supporting beam (4) to an external dust-generating space (7) located between the doctor blade (6) and the soft paper web (3) creped off; and a second suction connection (40, 42, 43) connecting the second suction chamber (25) of the supporting beam (4) with an internal dust-generating space (8) located between the doctor blade (6) and the envelope surface of the yankee cylinder (1).
    Type: Grant
    Filed: February 28, 1990
    Date of Patent: April 30, 1991
    Assignee: Valmet Paper Machinery, Inc.
    Inventors: Tord G. Gustavsson, Harry I. Myren, Karl T. I. Silja
  • Creping doctor with two suction chambers in the support beam
    Patent number: 5007986
    Abstract: A creping doctor (2) for creping a soft paper web (3) off a yankee cylinder (1) is described which comprises a supporting beam (4) disposed close to the envelope surface of the yankee cylinder (1) and provided with an internal space, the internal space of the supporting beam (4) is divided into a first longitudinal suction chamber (24) and a second longitudinal suction chamber (25). The creping doctor also produces a subatmospheric pressure in the suction chambers (24, 25); a first suction connection (18, 19, 21) connecting the first suction chamber (24) of the supporting beam (4) to an external dust-generating space (7) located between the doctor blade (6) and the soft paper web (3) creped off; and a second suction connection (40, 42, 43) connecting the second suction chamber (25) of the supporting beam (4) with an internal dust-generating space (8) located between the doctor blade (6) and the envelope surface of the yankee cylinder (1).
    Type: Grant
    Filed: February 28, 1990
    Date of Patent: April 16, 1991
    Assignee: Valmet Paper Machinery, Inc.
    Inventors: Tord G. Gustavsson, Frans O. S. Lyxell, Karl T. I. Silja