Patent · US Expired

Method for controlling the winding density of film rolls

US6189825A · kind A · utility

4Cited by

6References

20Claims

0Family size

Assignee

Hoechst Trespaphan GmbH · DE

Inventors

Dieter Mathieu · Ottweiler, DE
Robert Schmidt · Minnetonka, US

Key dates

Filing date	Apr 30, 1999
Grant date	Feb 20, 2001
Priority date	—
Expiry date	Apr 30, 2019

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB65H18/26
WIPO fieldHandling
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.