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:
Sep. 08, 1998
Filed:
Jan. 11, 1996
Applicant:
Inventors:
Thomas H Palombo, Akron, OH (US);
Gareth O Ridout, Ravenna, OH (US);
Assignee:
Alltrista Corporation, Muncie, IN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
356240 ;
Abstract
A can end to be inspected, including a portion coated by a sealing material, is illuminated by polarized light. The light reflected from the object and sealing material is viewed by a camera through a polarizing filter. The polarizing filter blocks out polarized light reflected by the can end and sealing material that does not contain any defects, but passes light reflected by the sealing material that has been depolarized by a defect in the sealing material.