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. 09, 1989
Filed:
Nov. 06, 1987
Toshiyuki Iwasawa, Tokyo, JP;
Masayoshi Miura, Kawasaki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An ink jet recording apparatus with an ink jet printing head is disclosed. The ink jet printing head has first and second electrodes for ejecting ink toward writing paper by means of an electric field established between the first and second electrodes, the first electrode being disposed in opposed relation to the writing paper. The writing paper is placed on a cylindrical drum which is provided so as to be in opposed relation to the ink jet printing head and moved with respect to the ink jet printing head. Also included in the ink jet recording apparatus is a third electrode which is provided on the outer surface of the cylindrical drum in opposed relation to the ink jet printing head. The third electrode is controlled so that the potential thereof is equal to or higher than that of the ink jet printing head.