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:
Aug. 04, 1987
Filed:
Jul. 16, 1986
Masayoshi Miura, Kawasaki, JP;
Toshiyuki Iwasawa, Tokyo, JP;
Abstract
Disclosed is a method for operation of an ink jet printing head of the type wherein printing ink is discharged from a plurality of ink nozzles toward a writing surface by the aid of an electric field established between a plurality of control electrodes associated with the ink nozzles and a common electrode in opposed relation to the control electrodes. In response to a picture element signal for controlling the discharge of ink from the ink nozzles, a control pulse is generated and applied to each of the control electrodes, while a pulse bias is generated and provided to the common electrode. The pulse bias is supplied thereto only in the presence of the control pulse. The minimum width of the control pulse is established to be greater than 1/fp and smaller than 2/fp where fp is the frequency of the picture element signal.