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:
Dec. 25, 2001
Filed:
Jun. 05, 1998
Seiichi Kato, Miyagi, JP;
Kouichi Ohtaka, Miyagi, JP;
Hiromichi Komai, Kanagawa, JP;
Junichi Azumi, Miyagi, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An ink jet head of the present invention compresses ink with an electrostatic force generated between each vibration plate and a counter electrode facing it. A glass substrate is formed with through holes in which a conductor is buried. A metal wiring pattern and conductor bumps are provided on the rear of each counter electrode. The conductor bumps and counter electrodes associated therewith are electrically connected together. Ink is fed from the rear of the glass substrate to a common ink chamber via a through hole assigned to ink feed. A metal wiring pattern on the rear of the glass substrate allows the conductor bumps to be arranged at any desired positions. The head does not need any flexible printed circuit board or any wiring substrate.