The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 20, 2001
Filed:
Apr. 30, 1999
Applicant:
Inventors:
Dieter Mathieu, Neunkirchen/Saar, DE;
Robert Schmidt, Homburg/Saar, DE;
Assignee:
Hoechst Trespaphan GmbH, Wiesbaden, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65H 2/318 ;
U.S. Cl.
CPC ...
B65H 2/318 ;
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 &agr;, 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.