Thermoroll for a paper/board machine or finishing machine and a method for manufacturing the thermoroll
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United States of America Patent
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Nov 23, 2004
Grant Date -
N/A
app pub date -
Jan 22, 2002
filing date -
Mar 29, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The object of the invention is a thermoroll for a paper/board machine or a finishing machine, the said thermoroll comprising a shell (2; 4, 5) of metallic, ceramic or composite material, the shell incorporating ducts (3; 9) for passing a heating medium from one axial end of the shell to its opposite end. The shell is made by means of casting or powder metallurgical methods, and the ducts (3; 9) are formed in the matrix material of the shell which is of metal and/or ceramic, directly in connection with manufacture. A further object of the invention is a method for manufacturing a thermoroll.
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