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. 29, 1981
Filed:
Dec. 26, 1979
Applicant:
Inventor:
Jorma Tuomaala, Karhula, FI;
Assignee:
A. Ahlstrom Osakeyhtio, Noormarkku, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
250561 ; 250226 ;
Abstract
A method and an apparatus for determining the location of a piece of timber having a flat top surface and two unfinished side surfaces or determining the width and location of its flat top surface is described. The piece of timber is subjected to radiation in such a manner that the top surfaces and the side surfaces are simultaneously subjected to radiation of different wave length. Light may be used as the source of radiation and rays of different wave length are reflected from the piece of timber and are separately detected by means of a light sensitive element.