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:
Nov. 27, 2001
Filed:
Aug. 19, 1999
Yoshifumi Shibata, Toyokawa, JP;
Other;
Abstract
A direct recording apparatus comprises a recording roller for retaining charged toner particles, a back electrode provided as opposed to the recording roller to electrostatically attract the toner particles, a PC board disposed between the recording roller and the back electrode, and provided with apertures having a diameter through which the toner particles can pass, a first electrode disposed near the aperture in the PC board, to which a predetermined voltage is applied in order to more strongly attract the toner particles retained on the recording roller toward the back electrode, and a second electrode disposed near the aperture and on the side of the back electrode with respect to the first electrode in the PC board, to which a predetermined voltage is applied so that a group of toner particles passing through the aperture converges, wherein gradation of an image to be recorded are controlled by adjusting the application time of a pulse voltage to be applied to the first electrode depending on a base voltage to be applied to the second electrode. With this configuration, proper gradation control can be attained depending on the potential of the second electrode.