| US 7,491,295 B2 | ||
| Dewatering element having non-pulsing dewatering followed by pulsing dewatering | ||
| Antti Poikolainen, Jyväskylä (Finland); Marko J. Moilanen, Vesanka (Finland); and Kari Lamminmäki, Jyväskylä (Finland) | ||
| Assigned to Metso Paper, Inc., Helsinki (Finland) | ||
| Filed on May 02, 2006, as Appl. No. 11/416,400. | ||
| Claims priority of application No. 20060155 U (FI), filed on Apr. 07, 2006. | ||
| Prior Publication US 2007/0235153 A1, Oct. 11, 2007 | ||
| Int. Cl. D21F 11/04 (2006.01) | ||
| U.S. Cl. 162—203 [162/352; 162/374; 162/211; 162/300] | 18 Claims |
| 1. A dewatering element in a forming section of a paper or board machine, comprising:
a dewatering element in the forming section having a wall, wherein an endless wire is in contact with the wall and mounted
for motion over the wall in a downstream machine direction, the wire having a cross machine direction width;
wherein the wall has portions which define a non-pulsating suction zone which extends in the machine direction, wherein the
non-pulsating suction zone also extends in the cross machine direction a width which is at least as wide as the width of the
wire; and
portions of the wall forming an outlet groove located after the non-pulsating suction zone in the downstream machine direction,
the outlet groove extending essentially in the cross machine direction.
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