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:
Jan. 02, 1990
Filed:
Mar. 23, 1989
Charles A Kuecker, Cary, IL (US);
Gary M Klawinski, McHenry, IL (US);
Crosfield Ebway, Inc., Wauconda, IL (US);
Abstract
An apparatus for detecting and guiding a web includes a web scanner bar unit that extends across the entire width of the web path for controlling a steering mechanism to maintain a more precise edge and/or center alignment. The web scanner bar unit is formed of an infrared light-emitting diode array and a phototransistor array formed on opposite sides of the web. A microprocessor-based controller unit is provided for controlling the operation of the web scanner bar unit to form right and left eyespots in order to determine the respective right and left edges of the web. Further, the web scanner bar unit is capable of detecting a break in the intermediate area of the web.