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. 15, 2001
Filed:
Nov. 20, 1998
Yoshifumi Shibata, Toyokawa, JP;
Toshio Yamaki, Takatsuki, JP;
Hirokatsu Shimada, Machida, JP;
Koji Uno, Kobe, JP;
Hiroshi Hiraguchi, Toyokawa, JP;
Minolta Co., Ltd., Osaka, JP;
Abstract
The printing head,includes an insulative member,in which pluralities of apertures,are formed. Doughnut-like first and second electrodes,and,are disposed around the aperture,. Pulse voltages V,(P) and V,(P) both having a certain polarity opposite to that of the toner particles are applied to the first and second electrodes,and,, energizing the toner particles,to afford propelling thereof. Subsequently, a voltage V,(B) having the same polarity as the charged toner particles,is applied to the second electrode,, forcing radially inwardly to converge the propelling toner particles,in the aperture,. This ensures that a dot and an image both having clear contour can be formed on the sheet