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:
Jul. 29, 1997
Filed:
Aug. 16, 1995
Kenji Katsuhara, Osaka, JP;
Mita Industrial Co., Ltd., Osaka, JP;
Abstract
A method and an apparatus for selecting an amount of light to be irradiated for fog detection onto a photoreceptor from a density detecting device out of amounts of light for low density or for high density. A real original is illuminated by a predetermined amount of illuminating light, whereby a toner image corresponding to the real original is formed on the photoreceptor. Light of an amount for low density from the density detecting device is irradiated onto the toner image to acquire a first density data. Thereafter, a pseudo original is illuminated by the predetermined amount of illuminating light, whereby a toner image corresponding to the pseudo original is formed. Light of the amount for low density from the density detecting device is irradiated onto the toner image to acquire a second density data. The difference between the first and the second density data is compared with a predetermined threshold value. If the difference is less than the threshold value, the amount of light for low density is selected for fog detection. If the difference is not less than the threshold value, an amount of light for high density is selected.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile