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. 23, 2002
Filed:
Apr. 14, 2000
Applicant:
Inventor:
Yoshihiro Hagiwara, Niigata, JP;
Assignee:
Fuji Xerox Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 1/508 ; G03G 1/510 ;
U.S. Cl.
CPC ...
G03G 1/508 ; G03G 1/510 ;
Abstract
The present invention provides a toner concentration measuring apparatus capable of precisely measuring the concentration of toner in a developer and having first and second light guiding devices whose end surfaces project into a duct traversed by developer fluid and a light receiving device for receiving light transmitted from the first light guiding device to the second light guiding device.