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.:

US 6881962 B1

PDF
Full Text
Expired
Date of Patent:
Apr. 19, 2005

Filed:

Jun. 24, 2002
Applicants:

Hideaki Kamijo, Tokyo, JP;

Kouyou Usami, Tokyo, JP;

Inventors:

Hideaki Kamijo, Tokyo, JP;

Kouyou Usami, Tokyo, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N021/64 ;
U.S. Cl.
CPC ...
Abstract

In the accurate inspection of a paper sheet (for example, the type and authenticity of banknotes) light incident on the paper sheet that is being transported is controlled to be constant. To achieve such control, in accordance with the present invention, an illumination monitor is disposed facing an illumination window, and the light reflected by an inner surface of the illumination window is detected by the illumination monitor. Since, in this configuration, the illumination monitor faces the illumination window, the illumination monitor has a monitor region on a transportation path. The illumination monitor is directed toward the illumination window so that the monitor region is positioned outside an illumination region formed by a light-emitting element, thereby preventing the illumination monitor from picking up the light reflected from a transportation path of the paper sheet.


Find Patent Forward Citations

Kamijo, Hideaki. (2005). Paper fluorescence detection sensor (U.S. Patent No. 6881962). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6881962

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