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:
Aug. 21, 1990
Filed:
Feb. 06, 1989
Michael A Butler, Rochester, NY (US);
Dusan G Lysy, Fairport, NY (US);
Paul W Morehouse, Jr, Webster, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A non-black colored toner DMA sensor arrangement includes a light emitting device for illuminating a toner/surface substrate with light of a wavelength to which colored toners are non-absorbing, and to which the imaging surface is either partially absorbing or transmissive. Light is reflected from the toner predominantly by either scattering or multiple reflections to produce a significant component of diffusely reflected light. A sensor is arranged for detection of the diffusely reflected light, at an angle that does not detect the specularly reflected component of reflected light. An increasing level of diffusely reflected light indicates an increased density of toner coverage per unit area.