Measurement method and system in the manufacture of paper or...

Details Measurement method and system in the manufacture of paper or... Measurement method and system in the manufacture of paper or...

2005-06-28

2005-06-28

Noori, Max (Department: 2855)

Measuring and testing

Sheet, woven fabric or fiber

Reexamination Certificate

active

06910376

ABSTRACT:
In a measurement method in the manufacture of paper or paperboard, different forces prevailing in a nip between a roll and a counter roll of an apparatus conveying a paper or paperboard web are measured. In the method there are several measurement points implemented with one or more film sensors (3) placed in the roll (1) in the transverse direction of the paper or paperboard web. The measurement information obtained from the measurement points by means of the sensor or sensors (3) is utilized to determine the pressure distribution of the nip. The film sensor (3) is a piezo- and pyroluminescent sensor from which the measurement information can be received optically at least in the initial stage, or a sensor comprising an electromechanical film (EMFi). The sensors (3) placed in the calender roll (1) can be utilized to measure the pressure distribution of the calender nip (N).

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