D - Textiles – Paper – 21 – D
Patent
D - Textiles, Paper
21
D
92/41
D21D 5/24 (2006.01) D21D 1/00 (2006.01) D21D 1/38 (2006.01)
Patent
CA 1145987
TITLE: METHOD AND APPARATUS FOR CONTROLLING THE REFINING OF FIBROUS PULP GRIST IN A DRUM REFINER INVENTOR: ARNE JOHAN ARTHUR ASPLUND ABSTRACT OF THE DISCLOSURE Method and apparatus for controlling the refining of fibrous lignocellulosic pulp in a drum refiner in which the pulp stock, or grist, is conveyed into a cylindrical stationary drum and propelled therein in a linear direction in a pulsating fashion by a co-axial rotor comprising a plurality of wings which attack the grist in a wedging action as it is pushed ahead of the leading faces of the wings and which induce in the grist internal frictional shear forces while it is forced through a gap defined between the leading edges of the wings and a series of shear means arranged axially along the interior surface of the stationary drum. The process is controlled by co- ordinating the angle of attack on the grist by the wings and corres- ponding variations in the gap clearance with the energy demands or mechanical power input.
358468
Asplund Arne J.a.
Marks & Clerk
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