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:
May. 20, 1997
Filed:
Jun. 20, 1994
Shigeru Kagayama, Owariasahi, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
An aperture electrode unit of an image forming apparatus includes an insulating sheet, control electrodes formed on the insulating sheet and apertures formed in the aperture electrode unit. The insulating sheet is formed of material having a dielectric constant higher than a toner layer. With this construction, a voltage applied across the control electrodes and the toner carry roller is divided in accordance with a capacity rate of these elements. Thus, the voltage is effectively applicable to the toner layer, so that the toner control performance can be improved even at a low-voltage driving time. Therefore, an excellent image recording operation can be performed by a low-voltage driving operation.