Drum winder and method for winding a web
AssigneeValmet Paper Machinery Inc.
InventorsVesa Raudaskoski, Petteri Rinne
Life of this patent
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Abstract
A drum winder and method for winding a web, including winding drums for supporting a roll that is being formed and a pressurized gap formed by the winding drums and the roll being formed. The cutter well or a part of same has been formed as a sealed pressure chamber and is coupled to the gap in order to pressurize the gap.
Claims18
Drum winder situated over a cutter well, said drum winder including winding drums for supporting a roll being formed as a web is wound thereon and a pressurized gap formed by said winding drums and said roll, the improvement comprising
- means for forming a sealed pressure chamber in said cutter well communicating with said gap,
- means for pressurizing said pressure chamber such that said gap communicating therewith is pressurized,
- said winding drums being positioned above a plane of a floor on which the drum winder is situated, and
- first sealing means for sealing spaces between said floor and said winding drums, said first sealing means and said floor being integrally connected to one another.
Drum winder situated over a cutter well, said drum winder including winding drums for supporting a roll being formed as a web is wound thereon and a pressurized gap formed by said winding drums and said roll, the improvement comprising
- means for forming a sealed pressure chamber in only a part of said cutter well and in communication with said gap,
- means for pressurizing said pressure chamber such that said gap communicating therewith is pressurized,
- a support beam for supporting said pressure chamber, and
- displacement means for moving said pressure chamber along said support beam.
Drum winder situated over a cutter well, said drum winder including winding drums for supporting a roll being formed as a web is wound thereon and a pressurized gap formed by said winding drums and said roll, each of said winding drums comprising a cylinder face, the improvement comprising
- means for forming a sealed pressure chamber in said cutter well communicating with said gap,
- means for pressurizing said pressure chamber such that said gap communicating therewith is pressurized,
- sealing means for sealing spaces between said pressure chamber and said cylinder faces of said winding drums,
- a lower end seal unit for sealing said pressure chamber at ends of said winding drums, and
- an upper end seal unit for sealing ends of said gap,
- said sealing means, said lower end seal unit and said upper end seal unit or parts thereof being displaceable to form a space between said winding drums and said sealing means.
Method for pressurizing a gap in a drum winder defined by winding drums and a roll supported by said winding drums and onto which a web is being wound, said drum winder being situated over a cutter well, comprising the steps of:
- forming a sealed pressure chamber in only a part of said cutter well,
- coupling said pressure chamber to said gap,
- providing a pressure in said pressure chamber such that said gap coupled therewith is pressurized,
- supporting said pressure chamber in said cutter well on a support beam, and
- moving said pressure chamber along said support beam.
Dependencies are inferred from the claim text.