Method for controlling the winding density of film rolls

Details Method for controlling the winding density of film rolls Method for controlling the winding density of film rolls

B - Operations, Transporting

65

H

B65H 43/00 (2006.01) B65H 18/00 (2006.01) B65H 18/26 (2006.01) B65H 23/195 (2006.01)

Patent

CA 2270712

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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