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:
Jul. 16, 2002
Filed:
Nov. 20, 2001
Shinzo Kida, Tokyo, JP;
Yoshiaki Ishikawa, Tokyo, JP;
Japan Tobacco Inc., Tokyo, JP;
Abstract
In an optical density checking apparatus, a 0.7-&mgr;m first light beam not transmitted through shredded leaf tobacco and a 1.3-&mgr;m second light beam transmitted through the shredded leaf tobacco, which are from first and second light sources, are synthesized, and an obtained synthetic light beam is applied to a tobacco rod. The projected light quantities, reflected light quantities, and passing light quantities of the first and second light beams are measured by a composite light-receiving element, projected light quantity control circuit, and arithmetic circuit. The arithmetic circuit calculates the transmitted light quantity of the second light beam transmitted through the shredded leaf tobacco on the basis of the projected light quantities, reflected light quantities, and passing light quantities of the first and second light beams, and calculates the density of the shredded leaf tobacco on the basis of the transmitted light quantity.