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    • 3. 发明专利
    • DRYING UNIT OF PAPER MACHINE OR BOARD MACHINE
    • JP2003201693A
    • 2003-07-18
    • JP2002368819
    • 2002-12-19
    • METSO PAPER INC
    • JUPPI KARIKOMULAINEN ANTTI
    • D21F5/04
    • PROBLEM TO BE SOLVED: To provide a drying part of a high-speed operating paper machine, having good traveling performance. SOLUTION: This drying part D of the paper machine uses a single wire draw and is composed of two or more drying groups, wherein a paper web W snakes and travels through an upper train of drying cylinders 20 and a lower train of reversing cylinders 21, while being supported on drying wires F. The first drying group R 1 of the cylinders extends to such a point that pressure generated by shrinkage of the paper web starts to have an effect of opposing the traveling of the web, wherein the web has a solid content of 50-65% at the point. A traveling component 30 is arranged in a pocket space T which is composed of the drying cylinder, the reversing cylinder, and the drying wire F in the first drying group of the cylinders, so that a high negative pressure of 1,000-8,000 Pa is given to such an area in the pocket space that the web is separates from the drying cylinder 20, and the traveling component generates a low negative pressure of 100-500 Pa at least in the other area of the pocket space. COPYRIGHT: (C)2003,JPO
    • 9. 发明专利
    • FI120746B
    • 2010-02-15
    • FI20012514
    • 2001-12-19
    • METSO PAPER INC
    • JUPPI KARIKOMULAINEN ANTTI
    • D21F5/04
    • A high speed dryer section has single-wire draw drying groups (R1, RN). A paper or board web (W) is supported by a wire (F) as it meanders over drying cylinders (20) in an upper row and reversing cylinders/rolls (21) in a lower row. A first cylinder drying group (R1) has at least five drying cylinders. In the first cylinder drying group (R1) a runnability component (30) is placed in a pocket space defined by every two successive drying cylinders (20) and the reversing roll (21) between them and by the drying wire (F) for applying a high under-pressure of 1000-8000 Pa to an area (50Y) in which the web (W) separates from the drying cylinder (20), and by which runnability component (30) a lower under-pressure of 100-500 Pa is produced in at least part of the rest of the pocket space (T).