A press

D - Textiles – Paper – 21 – F

Patent

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Details

D21F 3/02 (2006.01)

Patent

CA 2331320

A press for the dewatering of a fiber web, comprising a roll, a counterpart and an endless press belt adapted to glide around the counterpart. Into the concave press zone region of the counterpart, a flexible press plate is adapted, anchored to the counterpart at the leading edge of the counterpart, relative to web motion. Beneath the press plate, hydrostatic pressure chambers are provided, separated from each other by means of flexible pressure lines. By individually controlling the pressures of the chambers, the leads and optionally the press plate edges, a desired pressure profile is obtained across the extended pressure zone.

La présente invention concerne une presse permettant d'exprimer l'eau d'une bande fibreuse, qui comprend un rouleau, une contre-pièce et une courroie de presse fermée adaptée pour pouvoir glisser autour de la contre-pièce. Dans la région concave de la zone de presse de la contre-pièce, une plaque machine souple est adaptée, arrimée à la contre-pièce au niveau du bord d'attaque de la contre-pièce par rapport au déplacement de la bande. Il existe des chambres de pression hydrostatique sous la plaque machine, séparées l'une de l'autre au moyen de lignes de pression souples. Par le contrôle individuel des pressions des chambres, des lignes et éventuellement des bords de la plaque machine, on obtient le profil de pression recherché dans la zone de pression étendue.

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