A method, a blade holder and a doctor apparatus for...

Details A method, a blade holder and a doctor apparatus for... A method, a blade holder and a doctor apparatus for...

D - Textiles, Paper

21

F

D21F 7/00 (2006.01) D21G 3/04 (2006.01) D21G 9/00 (2006.01)

Patent

CA 2705419

The invention relates to a method for detaching a web threading tail from a moving surface in a fiber web machine. In the method the web threading tail (12) is detached from a moving surface (23) by means of air that flows from a blow-off blow channel (19) included in a blade holder (14), a trailing blow (26) is directed to the web threading tail (12) using air that flows from a trailing blow channel (17) included in the blade holder (14), the blade holder (14) includes a flow surface (32), and the trailing blow (26) is blown to the same direction with or in a small angle relative to the flow surface (32). The invention also relates to a corresponding blade holder and a doctor apparatus for detaching a web threading tail from a moving surface in a fiber web machine.

L'invention porte sur un procédé permettant de détacher une pointe d'engagement de bande de la surface mobile d'une machine à bande fibreuse. Le procédé consiste à détacher la pointe d'engagement de bande (12) d'une surface mobile (23) avec de d'air projeté par un canal de soufflage (19) compris dans un porte-lame (14) ; à diriger un courant arrière (26) vers la pointe d'engagement de bande (12) à l'aide d'air projeté par un canal de soufflage arrière (17) compris dans le porte-lame (14). Le porte-lame (14) comporte une surface d'écoulement (32) ; le courant arrière (26) est projeté dans la même direction ou à un angle minime avec la surface d'écoulement (32). L'invention porte également sur un porte-lame correspondant et sur un appareil de lame de racloir permettant de détacher une pointe d'engagement de bande d'une surface mobile dans une machine à bande fibreuse.

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