Patent ID: 7820013
Filing Date: 2010-10-26
Classification: D21D

Abstract:
1. A screen cylinder for cleaning or screening fiber pulp suspension, the screen cylinder comprising screen slots and accept channels for directing the portion penetrated the screen slots to an accept side of the screen cylinder of the fiber pulp suspension fed into a feed side of the screen cylinder, and at least one feed side surface is provided between the screen slots and the accept channels comprise at least one first surface of the accept channel and at least one second surface of the accept channel, wherein the accept channel is arranged in its entirety in a direction opposite to a feed flow direction of the fiber pulp suspension to be fed in the screen cylinder in the direction of the circumference of the screen cylinder in relation to a normal of a tangent of the screen cylinder, which is arranged to pass through the edge of the screen slot that is placed on the side of the first surface of the accept channel and that the first surface and the second surface of the accept channel are curved at least in the first part of the accept channel after the screen slot such that the first surface and the second surface of the accept channel are arranged to curve in the direction of the radius of the screen cylinder such that the accept channel is curved at least in the first part of the accept channel after the screen slot.