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:
Mar. 17, 1981
Filed:
Mar. 15, 1979
Robert C Peirson, Murrysville, PA (US);
James R Vanada, Pleasant Valley, IA (US);
Paul C Donatelli, Trafford, PA (US);
Aluminum Company of America, Pittsburgh, PA (US);
Abstract
A method of automatically maintaining a nominal property value of a material near a limiting value in the process of making the material. The method involves the steps of imparting to the material a property that varies about the nominal value, and measuring the varying property, the measured property having positive and negative excursions about the nominal value. Determination is then made of the amplitudes of the excursions, and the nominal value of the property is adjusted to a predetermined limiting value in response to the amplitude of the most recent excursion, i.e., the nominal value is adjusted toward or away from the predetermined limiting value in respective response to any decrease or increase in the amplitude of the most recent excursion relative to the amplitude of the excursion immediately preceding the most recent excursion.