Rolls and cylinders for use in paper machines
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United States of America Patent
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-
Mar 28, 1995
Issued Date -
N/A
app pub date -
Dec 28, 1993
filing date -
Jan 9, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for manufacturing a cylindrical mantle of rolls or cylinders of a paper machine out of a corrosion-proof metal or alloy material, particularly refined steel, in which oblong plate blanks are cut to a length equal to the total length of the roll mantle to be manufactured. The plate blanks are machined or bent to mantle portions of a cross-sectional shape equal to a part of a circular ring. Out of the mantle portions, the cylindrical mantle of a roll or cylinder is assembled by joining the mantle portions together by means of axial welding joints prepared by electron-beam welding performed in the vacuum chamber of an electron-beam apparatus by using a number of mantle portions per one roll mantle. A roll or cylinder manufactured by the method is also described.
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