Title:
LIQUID DROPLET EJECTION HEAD AND LIQUID DROPLET EJECTION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2018/047576
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a liquid droplet ejection head and a liquid droplet ejection apparatus in which the viscosity resistance of an ejected liquid on the ejection side of a nozzle is decreased to prevent pointed-end ejection and improve the accuracy of an ejection angle. The above problem is solved by a liquid droplet ejection head provided with a channel 28 of which the volume is changed by a pressure generation element and a nozzle 23 communicating with the channel 28, the nozzle 23 containing a conical portion 23a with a diameter becoming gradually smaller toward an outside, and a cylindrical portion 23b continuous with the conical portion 23a and communicating with the outside. A connecting part of the conical portion 23a with the cylindrical portion 23b and a connecting part of the cylindrical portion 23b with the conical portion 23a have a corresponding opening cross-sectional shape. The cylindrical portion 23b has an axial length of 0.1D0 to 0.3D0 where D0 is the inner diameter thereof, and the conical portion 23a has an axial length of 0.6D0 or more and has a conical surface of which a generating line is at an angle of 6 degrees or more and 15 degrees or less with respect to a nozzle central axis.
Inventors:
SHIMOMURA AKITO (JP)
HIGASHINO KUSUNOKI (JP)
HIGASHINO KUSUNOKI (JP)
Application Number:
PCT/JP2017/029098
Publication Date:
March 15, 2018
Filing Date:
August 10, 2017
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
B41J2/14
Domestic Patent References:
| WO2007116699A1 | 2007-10-18 |
Foreign References:
| JP2014113822A | 2014-06-26 | |||
| JP2015107556A | 2015-06-11 | |||
| JP2013230676A | 2013-11-14 | |||
| JP2016007812A | 2016-01-18 | |||
| JP2005305883A | 2005-11-04 | |||
| JP2000343000A | 2000-12-12 | |||
| JP2011037257A | 2011-02-24 | |||
| US20080136869A1 | 2008-06-12 | |||
| JPS5428970B2 | 1979-09-20 |
Other References:
See also references of EP 3511167A4
Attorney, Agent or Firm:
MARUYAMA Eiichi (JP)
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