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:
Dec. 06, 2011
Filed:
Jan. 21, 2008
Applicants:
Kenneth G. Brittain, Cottage Grove, MN (US);
Steven P. Floeder, Shoreview, MN (US);
Inventors:
Kenneth G. Brittain, Cottage Grove, MN (US);
Steven P. Floeder, Shoreview, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A lighting configuration that is a combination of far dark field lighting and a modified dark stripe lighting is disclosed. The novel combination provides a more robust detection of flaws on, e.g. a moving web of transparent film, than either would provide alone or through a summation of their individual parts.