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. 23, 1999
Filed:
Feb. 20, 1997
Albrecht Koller, Munchen, DE;
Bernd Scholtysik, Munchen, DE;
EMTEC Magnetics GmbH, Ludwigshafen, DE;
Abstract
A surface testing device, operating by reflection, for linearly moving, tape-like materials, for example paper or polymer films, is suitable for automatic online registration of linear irregularities transverse to the direction of movement. The testing device includes a suitable test distance, at least two optical inspection units and at least one electronic circuit arrangement for detecting both the individual signals of the inspection units and the coincidence signals. In addition, a magnetic information medium wound in the form of a roll on a hub is tested by the surface testing device and carries a machine-readable and/or visually readable quality identification.