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:
Jan. 03, 1989
Filed:
Mar. 06, 1987
Hideyuki Kanbayashi, Toyokawa, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
An apparatus for detecting image density in an image forming machine includes a first sensor for receiving mainly a regular reflecting light reflected from a reference toner image, and a second sensor for receiving mainly scattered reflecting light reflected from the reference toner image. The output signals from each sensor are compared with each other so as to produce a differential signal. Upon presetting the difference signal to be nil for a predetermined image density, an increase or a decrease of the reference toner image will invite a change of plus/minus sign of the differential signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile