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:
Aug. 18, 2020
Filed:
Aug. 10, 2017
Konica Minolta, Inc., Tokyo, JP;
Akito Shimomura, Hino, JP;
Kusunoki Higashino, Musashino, JP;
Konica Minolta, Inc., Tokyo, JP;
Abstract
An object of the present invention is to provide a liquid droplet ejection head and a liquid droplet ejection apparatus in which viscosity resistance of a liquid to be ejected is reduced on an ejection side of a nozzle to prevent pointed-end ejection and to improve accuracy of an ejection angle. This object is achieved by the following. That is, a channelhaving a volume to be changed by a pressure generation element and a nozzlecommunicating with the channelare included. The inside of the nozzlehas a conical portionwith a diameter becoming gradually smaller toward an outside, and a cylindrical portioncontinuous with the conical portionand communicating with the outside. A connecting part of the conical portionto the cylindrical portionhas the same opening cross-sectional shape as a connecting part of the cylindrical portionto the conical portion. When an inner diameter of the cylindrical portionis represented by D, the cylindrical portionhas an axial length of 0.1Dto 0.3D, and the conical portionhas an axial length of 0.6Dor more and a conical surface in which a generating line has an angle of 6 degrees or more and 15 degrees or less with respect to a nozzle central axis.