Patent ID: 7988825

Claim:
A web-forming section of a paper or board machine comprising: a first web-forming unit arranged to form a first fiber layer on a first side of a first wire, the first wire arranged to travel in a first direction; a second web-forming unit arranged to form a second fiber layer on a second wire; a couch shoe having a curved deck spaced in the first direction from the first web-forming unit, the couch shoe arranged to guide the second fiber layer on the second wire into engagement with the first fiber layer on the first side of the first wire at an angle of less than 20° with respect to the first wire, wherein at the couch shoe the first fiber layer and the second fiber layer form a single joint web without an intermediate fiber layer therebetween; wherein the couch shoe comprises at least one low-pressure chamber and the curved deck of the shoe is provided with openings in communication with the at least one low-pressure chamber such that suction is applied to the first and second fiber layers where the first wire and the second wire form a nip and wherein the shoe openings are located so that non-pulsating dewatering is provided.