Abstract: The present invention is directed to methods and apparatus for screening a pulp suspension where the pulp suspension is directed to a screening space, where a part of the fibres in the pulp is screened using a drum-type rotor. The residual pulp suspension is then directed to a dilution space where it is mixed with recirculated pulp flow and the pulp suspension in the dilution space will be screened. Resulting preliminary reject flow is directed to a mixing space where it mixes with a dilution flow. The recirculated pulp flow is then directed back to the dilution space.

Abstract: An apparatus and a method for processing recycled material, comprising a first pulper (3) having an inlet (2) for receiving recycled material (1), a water inlet (26) for producing a mixture of water and particles of recycled material, a first rotor unit (R1) configured to slush recycled material and a first screen plate (18) connected to a first outlet (20) configured to extract a first portion of recycled material from the first pulper (3); a last pulper (8) having a reject washer configured to remove coarse rejected recycled material from the last pulper (8); and an upper channel (4) from the first pulper (3) to the last pulper (8), wherein the mixture of water and particles of recycled material is configured to flow over from the first pulper (3) to the last pulper (8).

Abstract: A rotor unit in a vessel containing a mixture of water and particles of recycled material, comprising a rotor unit body (19); a screen plate (18) installed to the vessel; a rotor (78) connected to the rotor unit body (19) and configured to rotate inside the vessel, comprising at least two wings (81) configured to slush recycled material in a rotating action and at least two foils (82) configured to clean the screen plate (18) by rotating above the screen plate (18); a space (89) around the rotor (78) defined by a rotor body (77); pipework (21) configured to bring diluting water from outside the vessel to the space (89) around the rotor (78); wherein the rotor body (77) defining the space (89) around the rotor (78) comprises an opening (76) allowing the diluting water to pass through the opening (76) towards the mixture of water and particles of recycled material.

Abstract: A corner joint for a building made of timber elements. The exterior surface of the building is a wall element made of logs, and the interior surface is a wall element is also made of logs. The space between the wall elements is fitted with thermal insulation. Both wall elements end inside the corner joint, so that the exterior corner, which extends over the wall line of the building is made of separate corner elements on top of one another. The interior wall elements are placed crosswise in the corner, reach to and end substantially in the exterior wall elements. The crosswise stacked corner elements have extensions, which between the interior and exterior wall elements, reach over the crosswise interior wall elements. The extensions have an inter-locking shape, such as a notch, at the interior wall elements.