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:
May. 14, 1996
Filed:
Oct. 26, 1993
H Joseph Gerber, West Hartford, CT (US);
Ronald J Straayer, South Windsor, CT (US);
Bruce L Davidson, East Hartford, CT (US);
Scott P Snietka, Andover, CT (US);
Peter M Walsh, South Windsor, CT (US);
Dana W Seniff, South Glastonbury, CT (US);
James P Kohler, Southbury, CT (US);
Gerber Systems Corporation, South Windsor, CT (US);
Abstract
A method and apparatus used with a printed circuit board (PCB) defect detection system generates a reference database image of the PCB having tolerances for each individual PCB feature wherein a tolerance database of at least three states in which each color is weighted and adjacent pixels are grouped into arrays or 'bins'. An error signal is generated when the sum of the pixel weights in a bin exceeds a preselected threshold.