Method for cutting out an edge of a web in a paper machine
AssigneeMetsa-Serla Oy
InventorsReijo Vessari, Tapani Kimari
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Abstract
The invention relates to a method and apparatus for cutting the edge of a fibre web (4) in a paper machine. In the method, water nozzles (13a, 13b) are Conducted in a transverse direction with respect to the edge of the fibre web (4) so that the place where the cut comes against the surface of the yankee cylinder of the drying unit varies. The apparatus comprises water nozzles (13a, 13b) used for cutting, pipes (14a, 14b), a base (16), and a pneumatic cylinder (17) by which the water nozzles (13a, 13b) are deflected both in a longitudinal and transverse direction with respect to the fibre web (4).
Claims5
A method for producing a fibre web by a paper machine, said paper machine comprising a yankee cylinder, said method comprising the steps of:
- supplying pulp to a wire;
- dehydrating said pulp on said wire;
- cutting by means of a water jet the edges of the produced fibre web to produce strips of fibre, said water jet repetitively reciprocated throughout the production of the fibre web in a transverse direction with respect to the fibre web at a predetermined width so that the edge of the fibre web undulates at the cut and the place where the cut of the fibre web comes against the surface of the yankee cylinder varies;
- conducting said strips around the yankee cylinder for drying;
- and
- detaching said strips from the surface of the yankee cylinder.
Dependencies are inferred from the claim text.