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:
Mar. 08, 2005
Filed:
Apr. 25, 2003
Taisuke Kamimura, Nara, JP;
Kiyoshi Toizumi, Nara, JP;
Toshimitsu Gotoh, Yamatokoriyama, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
The charging method is arranged so as to charge the toner on a developing roller by electrons as generated by the photoelectric effect from a photo-electric surface of a toner layer regulating/charging blade. An electric bias is applied across a toner layer thickness regulating/charging blade and a developing roller, and an amount of electrons discharged indicated by current flowing across the toner layer thickness regulating/charging blade and the developing roller is measured by an amplifier. When the amount of electrons discharged is detected to be 1/t of an initial amount, the amount of light to be received by the photo-electric surface of an ultraviolet ray luminescent is increased by t times to be the initial amount. According to the foregoing method, such event that the photoelectric effect is weakened due to the deterioration of the photoelectric surface can be detected with ease, and thus desirable charged state of toner can be maintained with ease.