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:
Jul. 24, 2001
Filed:
Dec. 27, 1999
James Johnson, St. Charles, IL (US);
David Knapp, Knoxville, TN (US);
A. J. Johnson, St. Charles, IL (US);
Other;
Abstract
A control system is provided for a rolling mill that feeds sheet material from an unwind reel to a rewind reel, passing it between a pair of work rolls. The control system includes a speed sensor for sensing speed of the sheet material and a sensor for measuring material thickness. A force controller controls force exerted on the sheet material by the work rolls. A tension controller controls tension on the unwind reel. A programmed controller is operatively connected to the speed sensor, the force controller and the tension controller, and stores information representing cyclical deviations in thickness of the sheet material and controls the force controller and the tension controller using the stored information and the sensed speed.