D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
92/14.1
D21F 1/00 (2006.01) D21F 3/00 (2006.01) D21F 9/00 (2006.01)
Patent
CA 1168492
ABSTRACT A device for the continuous dewatering of a fibrous material web, preferably in the form of a double screen paper making machine, has in the preferred embodiment two endless screens, namely a lower screen and an upper screen. The lower screen upon which the paper web is formed, runs together with the upper screen onto the lower area of a dewatering roll located within the loop defined by the upper screen. The two screens run around the lower rising quadrant of the dewatering roll and down from this and wrap around the upper area of a support roll that is arranged within the lower screen loop. The roll cover of the dewatering roll has recesses that pick up water in the wrap around area of the two screens and throws this off behind the run off point of the screens from the roll cover into the interior of the web loop of the upper screen. In the direction of movement of the web behind the support roller, there is a trap container for the water that is thrown off. This has a cover that is curved upwards and extends counter to the direction of movement of the screen into the wedge shaped gap that is located between the dewatering roll and the screens. The trap container is divided into two chambers, these extending transversely to the direction of movement to the screens and each having a side outlet channel. The majority of water thrown off from the fibrous web passes in dense streams through the upper screen and along the cover wall into a main chamber where the streams are diverted into the direc- tion of the outlet channel with the help of guide blades. A minor portion of the water thrown off passes through the upper screen as a mist carried into the other chamber.
397202
Csordas Elemer
Egelhof Dieter
Kolb Otmar
Meinecke Albrecht
Mullner Josef
Fetherstonhaugh & Co.
Voith (j. M.) Gmbh
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