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:
Sep. 30, 2003
Filed:
Nov. 01, 2000
Applicant:
Inventors:
Gary Allen Denton, Lexington, KY (US);
Wilson Morgan Routt, Jr., Lexington, KY (US);
Assignee:
Lexmark International, Inc., Lexington, KY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 2/155 ; G01N 2/147 ;
U.S. Cl.
CPC ...
G01N 2/155 ; G01N 2/147 ;
Abstract
A toner patch sensor arrangement in an electrophotographic machine includes a substantially hollow chamber having a reflective interior surface, a first opening exposing a toner patch, a second opening and a third opening. A light emitting element emits light onto the toner patch through the first opening and the second opening. A light detecting element receives through the third opening light reflected off of the toner patch such that the reflected light is received only after the light has also reflected off the interior surface of the chamber.