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:
Aug. 17, 1993
Filed:
Dec. 06, 1991
Alois B Kerkhoff, Bissendorf, DE;
Wolfgang Storbeck, Bissendorf, DE;
Felix Schoeller jr GmbH & Co. KG, Osnabrueck, DE;
Abstract
A method of visually inspecting the formation of a web of translucent material by means of a device it moves past. The device consists of a source of light on one side of the web generating a beam of light of a desired hue and intensity that penetrates the web, and a video camera on the side of the web away from the source of light, intercepting the beam and converting it into a video signal that is forwarded to a monitor. The source of light emits the beam in a flash of duration t.sub.1 that is too short for the web to advance far enough while illuminated to blur the image. The image on the monitor is accompanied by a reference image.