Method and assembly for guiding a web of paper or board web...

D - Textiles – Paper – 21 – F

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Details

D21F 7/00 (2006.01) D21G 9/00 (2006.01)

Patent

CA 2341025

Method and assembly for guiding a web of paper or board or, alternatively, an edge strip sheared therefrom, in a paper machine or finishing equipment, the method being particularly suited for threading the web tail or edge strip through the machine in conjunction with a production shutdown or after a web break. According to the invention, the web (6) or its tail sheared from the web so as to form an edge strip is supported electrically by means of taking surfaces or electrodes (3, 5) disposed on opposite sides of the web (6) to different potentials. Particularly advantageously, the web (6) or the edge strip can be adhered to a roll (16), a belt (7) or a wire by taking said support element to a lower potential and disposing a higher-potential electrode (5) or a number of electrodes to the opposite side of the web.

L'invention concerne un procédé et un ensemble pour le guidage d'une bande de papier ou de carton ou, en variante, d'une bande marginale cisaillée, dans une machine à papier ou une installation de finissage, le procédé étant particulièrement approprié pour enfiler la queue de bande ou la bande marginale dans la machine, à la suite d'un arrêt de production ou d'une cassure de bande. Conformément à l'invention, la bande (6) ou sa queue cisaillée formant une bande marginale, est supportée électriquement en amenant à des potentiels différents, des surfaces ou des électrodes (3, 5) montées sur les côtés opposés de la bande (6). Suivant un mode de mise en oeuvre particulièrement avantageux, la bande (6) ou la bande marginale peut être appliquée sur un rouleau (16), une courroie (7) ou une toile, en amenant lesdits éléments supports à un potentiel inférieur et en disposant une électrode (5) ou une pluralité d'électrodes à potentiel plus élevé sur le côté opposé de la bande.

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