Patent ID: 8778142

Claim:
A suction roll for dewatering a fibrous web, comprising a rotatable and perforated suction roll jacket and a suction box, the suction box being connected to a negative pressure source in such a way that the former applies a negative pressure to an inner surface, that is delimited by seals, of the suction roll jacket, thus enabling a defined surface region of the suction roll to be aspirated, wherein the suction box has a first suction channel which extends in the interior of the roll substantially along the axis of the suction roll, and in that the suction box has a second suction channel which extends in the interior of the roll along the inner surface of the suction roll jacket and which is delimited by seals, the first suction channel being connected to the second suction channel by at least one connecting channel, and in that the at least one connecting channel leads into the first suction channel above a collection region of the first suction channel, such that extracted water can accumulate in the collection region and does not run off back through the connecting channel.