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Kenneth Grefve

Lars E Jonsson

Ulf A Lifvenborg

Kjell Ingvarsson

Magnus Hallef&auml;lt

Jesper Kiersgaard

Joar Johansson

J&ouml;rgen Bosson

Kjell O Ingvarsson

Lars Oi Jonsson

A roll arrangement for determining a web tension profile of a web. The roll arrangement includes a roll having a peripheral surface for guiding the web, which peripheral surface is provided with a plurality of openings, and a plurality of sensor arrangements. Each of the plurality of openings are arranged to receive one sensor arrangement of the plurality of sensor arrangements to thereby sense forces applied by the web to the roll. The roll arrangement is adapted to suspend the sensor arrangements in the respective opening.

Roll arrangement

A system and a method for measuring and determining flatness of a strip ( ) of rolled material. Said system is comprising a measuring roll ( ) having a cylindrical central structure ( ) having a number of measuring devices for force/pressure registration. Said devices is generating measurement output signals (U ) depending on the contact between the strip and the measuring roll ( ), wherein said measurement output signal (U ) comprises a force component signal (U ). Said system also comprises a Flatness Determination Unit ( ), said unit being arranged for calculating the flatness (&Dgr;&sgr; ) of the strip based exclusively on signals derived from measurement output signal (U ) values generated by said measuring devices and information about the values of the width and thickness of the strip ( ). The system is continuously determining the Wrap Angle (&agr;) from at least one measurement output signal (U ) and automatically compensating for a changing Wrap Angle (&agr;). The present invention also provides a computer program product, a computer data signal and a flatness determination signal for accomplishing said objects of the invention.

System and a method for measuring and determining flatness

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Vasteras, Sweden

Kenneth Grefve