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. 01, 2012
Filed:
Feb. 25, 2011
Naoki Yonekubo, Shiojiri, JP;
Naoki Yonekubo, Shiojiri, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A contraction portion of a vibration pulse includes a first contraction element which occurs subsequent to an expansion portion, a contraction maintaining element which follows the first contraction element, and a second contraction element which follows the contraction maintaining element, and when a time from a start point time of the expansion portion to an end point time of the expansion portion is set as t, a time from the end point time of the expansion portion to a start point time of the contraction portion is set as t, and a natural vibration period of ink in an ink flow path including a pressure chamber is set as Tc, the start point time (t+t) of the contraction portion is set to be in the range of any one of the following expressions (1) and (2).(t+t)<t+3Tc/8   (1)(t+t)>t+5Tc/8   (2)