Method and equipment for measuring tension of moving web
AssigneeMetso Paper Automation Oy
InventorJorma Virtanen
Life of this patent
Estimating the term…
Abstract
A method and equipment for measuring the tension of a moving web. The tension of the moving web is measured by means of a measuring element provided with a guide surface which the moving web is guided to pass such that the web forms an air cushion of the air it carries between the web and the guide surface. Measuring devices are arranged at a distance from one another in connection with the measuring element in the cross direction of the web for measuring a variable representing the tension of the moving web. The measuring element is moved back and forth in the cross direction of the web such that the tension profile of the web is measured at least on a part of the web width by means of the measuring devices arranged in connection with the measuring element.
Claims18
A method for measuring the tension of a moving web, in which method the tension of the moving web is measured by a measuring element provided with a guide surface which the moving web is guided to pass such that the web forms an air cushion of the air it carries between the web and the guide surface and in which method a variable representing the tension of the moving web is measured by measuring devices arranged in connection with the measuring element, at a distance from one another in the cross direction of the web,
- the method comprising:
- moving the measuring element back and forth in the cross direction of the web such that the tension profile of the web is measured at least on a part of the web width by the measuring devices arranged in connection with the measuring element.
Equipment for measuring the tension of a moving web, the equipment comprising
- a measuring element provided with a guide surface which the moving web is arranged to pass such that the moving web forms an air cushion of the air it carries between the web and the guide surface,
- measuring devices arranged in connection with the measuring element at a distance from one another in the cross direction of the web for measuring a variable representing the tension of the moving web, and
- a device which is arranged to move the measuring element back and forth in the cross direction of the web such that the tension profile of the web is arranged to be measured at least on a part of the web width by the measuring devices arranged in connection with the measuring element.
Dependencies are inferred from the claim text.