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:
Apr. 27, 2010
Filed:
Jul. 01, 2008
Tomomi Kawase, Nagano, JP;
Tomomi Kawase, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A head unit includes first to fourth droplet ejection heads. The first and second droplet ejection heads are arranged along a first direction parallel to nozzle arrays so that the nozzles constitute a first consecutive long nozzle array when viewed from a second direction perpendicular to the first direction. Also, the nozzles of the third and fourth droplet ejection heads constitute a second consecutive long nozzle array. In the first to fourth droplet ejection heads the nozzle arrays are arranged side by side in the second direction and the first nozzle array is shifted with a half pitch in the first direction with respect to the second nozzle array when viewed from the second direction. The nozzles of the first and second droplet ejection heads are arranged so as not to overlap with the nozzles of the third and fourth droplet ejection heads when viewed from the second direction.