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:
Apr. 12, 1977
Filed:
Apr. 11, 1975
S Keith Swanson, Saratoga, CA (US);
Measurex Corporation, Cupertino, CA (US);
Abstract
A method and apparatus for controlling the yield of fabric material from a tenter frame having spaced apart belts driven by drive means and an overfeed roll at its entry end. In a start-up or style change mode of operation a predicted dry yield is computed from data signals received before the fabric enters the tenter frame, then compared with a target value to produce a control signal to the overspeed roll. In the steady state mode of operation, actual yield is computed from data taken at the output end of the tenter frame; then is compared with a target yield value and thereafter modified by a correction factor proportional to variations in predicted dry yield computed from inputs taken at the entry to the tenter frame; the modified control signal again being applied to the overspeed roll.