Device and method for controlling the tension of a substrate web

US8662626B2 · kind B2 · utility

Assignee

• EASTMAN KODAK COMPANY · US

Inventors

• Dirk Kahl · Preetz, DE
• Karlheinz Peter · Molfsee, DE
• Rolf Spilz · Gettorf, DE
• Ulrich Schmidt · Flörsheim, DE
• Matthias Wecker · Bad Hersfeld, DE

Key dates

• Filing date: Nov 18, 2010
• Grant date: Mar 4, 2014
• Expiry date: Nov 18, 2030

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H23/1888
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A device for controlling substrate web tension includes first and second driving units with respective driving rollers around which the substrate web is partially guided and tensioned. The first and second driving units have different rotational moments of inertia. A measuring unit measures the tension of the substrate web. A control unit has first and a second filtering units with different filtering characteristics for filtering the measured value. The control unit includes a first control device for controlling the first driving unit based on the measured value filtered by the first filtering device, and a second control device for controlling the second driving unit based on the measured value filtered by the second filtering device.