Control roller having speed-dependent pressing force
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United States of America Patent
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May 13, 2008
Grant Date -
Sep 29, 2005
app pub date -
Feb 9, 2005
filing date -
Mar 26, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In an apparatus for adapting the pressing force of a control roller on a control can in a sheet-processing machine by a torsion spring, the apparatus either changes the effective spring length or the spring stiffness as a function of the rotational speed of the sheet-processing machine. The spring can be a torsion spring rod with an actuator setting the spring force by changing the prestress. A stiffening element can be connected to the torsion spring rod and set the spring force by changing the spring stiffness of the torsion spring rod.
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