FORFARANDE OCH ANORDNING FOR ATT I EN PAPPERSMASKINS TORKPARTI FORHINDRA TVERKRYMPNING AV PAPPERSBANAN

FORFARANDE OCH ANORDNING FOR ATT I EN PAPPERSMASKINS TORKPARTI FORHINDRA TVERKRYMPNING AV PAPPERSBANAN

It is a known phenomenon that the web during the drying moment in a paper machine shrinks. The shrinkage in the machine direction can be controlled by arranging the different driving groups in the drying section to operate at different speeds. The shrinkage in cross direction, however, heretofore wa...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: M T HTUN, H T HANSSON, N C FELLERS
Format: Patent
Sprache:swe
Schlagworte:
METHODS OF PRODUCING PAPER THEREON
PAPER-MAKING
PAPER-MAKING MACHINES
PRODUCTION OF CELLULOSE
TEXTILES
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Beschreibung
Zusammenfassung:It is a known phenomenon that the web during the drying moment in a paper machine shrinks. The shrinkage in the machine direction can be controlled by arranging the different driving groups in the drying section to operate at different speeds. The shrinkage in cross direction, however, heretofore was not brought under control. The present invention has the object to solve thos problem. According to the invention, the problem of shrinkage is solved in that the web during a certain drying interval is subjected to outward directed forces, which are applied during a suitable drying interval and preferably at a low dry content, for example directly after the press section.