METHOD AND APPARATUS FOR MEASURING THE TENSION OF A MOVING WEB

摘要

The invention relates to a method and apparatus for measuring the tension of a moving web. In the invention, a measuring beam (2) is curved so that a web moving over or under the measuring beam (2) forms an air cushion (3) of the air it transports between the measuring beam (2) and the web (1). The web (1 ) causes a force effect transmitted by the air cushion on the measuring beam (2). The tension of the web (1) is measured by measuring the force caused by the web (1) and transmitted by the measuring beam (2).