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:
Jul. 16, 2019
Filed:
Dec. 09, 2016
Roland Dg Corporation, Hamamatsu-shi, Shizuoka, JP;
ROLAND DG CORPORATION, Shizuoka, JP;
Abstract
A liquid injection device includes a liquid injection head and a controller including a driving signal generator generating a driving signal including, in one liquid drop injection period, a first driving pulse and a second driving pulse, and a driving signal supplier. The first driving pulse maintains the pressure chamber in an expanded state for a time period of about (½)×Tc; and the second driving pulse starts at a timing that is about n×Tc after the start of the first driving pulse, n being an integer satisfying n≥2, to maintain the pressure chamber in the expanded state for the time period of about (½)×Tc, and to inject the second liquid drop at a speed higher than, or equal to, a speed at which the first liquid drop is injected.