Patent ID: 7900330
Filing Date: 2011-03-08
Classification: D21F,Y10T

Abstract:
1. A method for changing a fabric in a paper or board machine having a tending side supported by a plurality of load-bearing support beams, the method comprising the steps of: forming at least one gap through each of said load-bearing support beams between an upper portion and a lower portion of each of said load-bearing support beams, by pressurizing a first pressure chamber mounted to the upper portion with pressure medium, which first pressure chamber is sealed against an inner surface of a first band, and supporting said first band with pressure medium, and forming the gap by pressurizing a second pressure chamber mounted to the lower portion with pressure medium, which second pressure chamber is sealed against an inner surface of a second band, and supporting said second band with pressure medium, so that the first band and the second band are free to move together supported by pressure medium between the first pressure chamber and the second pressure chamber through said load-bearing support beams; and passing the fabric through the plurality of load-bearing support beams between the first band and the second band of each of the gaps formed in the plurality of support beams.