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. 30, 2002
Filed:
Apr. 22, 1999
Applicant:
Inventors:
Heinz Oster, Feuerthalen, CH;
Patrik Zeiter, Zürich, CH;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 2/188 ;
U.S. Cl.
CPC ...
G01N 2/188 ;
Abstract
In order to detect pin-holes or tears in a foil ( ), during deformation of the foil ( ), the transmission of light through the foil is measured continuously by means of at least one light source ( ) situated on one side of the foil ( ) and at least one of the light sensors ( ) on the other side of the foil ( ). The light source ( ) is integrated in a shaping-punch ( ) and the light sensors ( ) are situated in a die ( ) which is employed along with the punch ( ). The pin-hole detector ( ) enables pin-holes or tears formed during the deformation of the foil to be detected on-line in a single shaping step closely resembling actual working practice.