Method and device in a paper machine, coating machine, intermediate winder, unwind stand of a slitter-winder, or in any other device for treatment of a web
AssigneeMetso Paper, Inc.
InventorsJorma Kinnunen, Silvo Mikkonen, Jukka Linnonmaa
Life of this patent
Estimating the term…
Abstract
The invention concerns a method and a device in a paper machine, coating machine, intermediate winder, unwind stand of a slitter-winder, or in any other device for treatment of a web. In the event of disturbance, the web (P) is made to be wound in a controlled way around at least one web guide roll (18a).
Claims16
A method in a paper machine, coating machine, intermediate winder, unwind stand of a slitter-winder, or any other device for the treatment of a paper web, comprising the steps of:
- guiding a paper web, in the event of a disturbance, in a controlled manner around at least one web guide roll;
- wherein a suction roll is used as said guide roll;
- and
- maintaining a constant slight vacuum in said suction roll in order to stabilize the run of the web and then creating an intensive vacuum in said suction roll substantially at the time of said disturbance.
A device in a paper machine, coating machine, intermediate winder, unwind stand of a slitter winder, or in any other device for the treatment of a paper web, said device comprising:
- at least one web guide roll, said guide roll being structured and arranged such that a web is wound around the guide roll in a controlled manner in the event of a disturbance;
- wherein said guide roll is a suction roll;
- and
- wherein said suction roll is structured and arranged such that a constant slight vacuum is maintained in the suction roll in order to stabilize said web and a intensive vacuum is generated in the suction roll substantially at the time of said disturbance.
A device in a paper machine, coating machine, intermediate winder, unwind stand of a slitter winder, or in any other device for the treatment of a paper web, said device comprising:
- at least one web guide roll, said guide roll being structured and arranged such that a web is wound around the guide roll in a controlled manner in the event of a disturbance;
- wherein said guide roll is a suction roll;
- and
- a moistening jet structured and arranged to provide a face of the guide roll with a fluid film which promotes adhesion.
A device in a paper machine, coating machine, intermediate winder, unwind stand of a slitter winder, or in any other device for the treatment of a paper web, said device comprising:
- at least one web guide roll, said guide roll being structured and arranged such that a web is wound around the guide roll in a controlled manner in the event of a disturbance;
- wherein said guide roll is a suction roll;
- an air foil box for producing streams of air for guiding a cut-off end of the web so that said cut-off end is wound around the web guide roll;
- and
- a carrier face structured and arranged to extend a distance around the web guide roll.
A device in a paper machine, coating machine, intermediate winder, unwind stand of a slitter winder, or in any other device for the treatment of a paper web, said device comprising:
- at least one web guide roll, said guide roll being structured and arranged such that a web is wound around the guide roll in a controlled manner in the event of a disturbance;
- wherein said guide roll is a suction roll;
- and
- a plate member arranged near said web guide roll, said plate member extending substantially across the entire width of the web guide roll in the cross direction;
- wherein said plate member includes a first plate portion which extends in a running direction of the web, said plate member being arranged in spaced relation to the web;
- wherein said plate member includes a second plate portion which extends along a face of the web guide roll at a distance spaced from the web guide roll;
- wherein the plate member is provided with perforations to permit the flow of air through the plate member.
Dependencies are inferred from the claim text.