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. 06, 1982
Filed:
Apr. 29, 1980
Applicant:
Inventors:
Robert N West, Chislehurst, GB;
Patricia A West, Chislehurst, GB;
Andrew J Barker, Orpington, GB;
Rosemary J Hall, Havant, GB;
Assignee:
Sira Institute Limited, Chislehurst, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
356431 ; 250572 ;
Abstract
Method and apparatus for detecting holes in sheet material such as tin plate where a beam from a laser is scanned across the sheet by a mirror drum, successive scans being arranged to strike the sheet material from upstream and downstream, and the light passing through a hole in the sheet material is received by a perspex light guide and passed to a photodetector.