Process and apparatus for drilling holes in the shell of a cylinder
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United States of America Patent
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Sep 14, 2004
Grant Date -
N/A
app pub date -
Jul 12, 1999
filing date -
Jul 13, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Process and apparatus for drilling holes in a shell of a paper machine cylinder, which is in its operating position. The process includes fixing a drilling apparatus to a cylinder adjacent to the cylinder to be drilled, and substantially eliminating influences of mechanical play due to structures of the adjacent cylinder prior to drilling, which includes coupling a support member to the adjacent cylinder to exert tangential forces on the adjacent cylinder, whereby the mechanical play is substantially eliminated. The apparatus includes a stationary framework supportable on the paper machine, a feed frame that is radially movable along said stationary framework relative to the shell, a drive unit, a plurality of drilling modules coupled to said feed frame, which are rotatable via the drive unit, a fixing device couplable to and adjacent cylinder, a device for eliminating influence of mechanical play due to structures of said adjacent cylinder, and support members adapted to exert tangential forces on said adjacent cylinder.
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