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:
Sep. 26, 1995
Filed:
Jun. 11, 1992
Takahiro Katakura, Nagano, JP;
Toshio Kumagai, Nagano, JP;
Shinji Yasukawa, Nagano, JP;
Hideaki Sonehara, Nagano, JP;
Masanao Matsuzawa, Nagano, JP;
Fujio Akahane, Nagano, JP;
Norihiko Kurashima, Nagano, JP;
Toshiaki Ohshima, Nagano, JP;
Katsuhiko Iida, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
An on-demand type ink jet print head, comprising: a plurality of ink tanks disposed at a lower position of a carriage to be independent of each other, pressure varying means provided on one of the tanks; an air release port communicating with the other one of the tanks; a head assembly provided on top of the tanks to communicate with the tanks through flow paths at both sides of the head assembly. The object of the invention is to achieve stable printing independent of the amount of ink in an ink tank and discharge bubbles in a nozzle head together with the ink.