Method for controlling the winding density of film rolls
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United States of America Patent
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-
Feb 20, 2001
Grant Date -
N/A
app pub date -
Apr 30, 1999
filing date -
Apr 30, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a method and apparatus for controlling the winding density of film rolls, a desired and an actual winding density of a film roll are determined and compared with one another. The quantity obtained from the comparison is multiplied by an adapting or damping factor .alpha., and the control output resulting therefrom is adapted to the film contact pressure and the film pull. The values thus obtained are fed as manipulated variables to a contact pressure actuator and a pull actuator for the film.
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