Inkjet head and coating apparatus using same

Patent metadata

Field	Value
Publication number	US-10112389-B2
Application number	US-201515318333-A
Country	US
Kind code	B2
Filing date	Jun 24, 2015
Priority date	Jun 27, 2014
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

In a common chamber (102) for distributing, to respective pressure chambers (211), an ink supplied from the ink inlet (101), resistant walls (111) are provided in areas that are located ahead and behind of the flow of the ink, i.e., areas around inlets of flow channels (221) that lead to respective pressure chambers (211), and any resistance against the flow of the ink is generated according to the heights of the resistant walls (111), thereby capturing a solid ingredient (150) included in the ink. In this case, by adjusting the heights of the resistant walls (111) to control capabilities of introducing the solid ingredient (150), it becomes possible to dispense desired amounts of the solid ingredient (150) to the respective pressure chamber (211).

First claim

What is claimed is:

1. An inkjet head, comprising:
multiple nozzles that each discharge droplets;
multiple pressure chambers that are each connected to the multiple nozzles, respectively, and that each generate pressures required for discharging of an ink;
a common chamber that supplies the ink to the multiple pressure chambers;
multiple discrete flow channels that each supply the ink to the respective multiple pressure chambers from the common chamber; and
an ink inlet from which the ink is supplied to the common chamber, wherein
resistant walls are provided correspondingly to respective inlets of the multiple discrete flow channels,
each of the pressure chambers is disposed in a lower portion of the respective resistance wall in a direction of gravity,
wherein the resistant walls have a triangular shape or an elliptical shape, are respectively different in height, and are located between the inlets.

2. The inkjet head according to claim 1 , wherein the respective sizes of the resistant walls differ from each other.

3. The inkjet head according to claim 2 , wherein the respective sizes of the resistant walls gradually become larger toward the direction from the upstream to the downstream of the flow of the ink in the common chamber.

4. The inkjet head according to claim 1 , wherein the cross-section area of the common chamber gradually becomes smaller toward the direction from the upstream to the downstream of the flow of the ink in the common chamber.

5. The inkjet head according to claim 1 , wherein the common chamber further includes an ink outlet from which the ink is discharged.

6. The inkjet head according to claim 1 , wherein an oscillating mechanism that oscillates the ink is further provided in the common chamber.

7. The inkjet head according to claim 1 , wherein the discrete flow channels are disposed in the lower part of the resistant walls in the direction of gravity, the pressure chambers are disposed in a lower portion of the discrete flow channels in the direction of gravity.

8. The inkjet head according to claim 1 , wherein the common chamber, the discrete flow paths, and the pressure chambers are aligned in a direction of gravitational force.

9. The inkjet head according to claim 1 , wherein a height direction of the resistant walls are the direction of gravity.

10. The inkjet head according to claim 1 , wherein the resistant walls, the discrete flow channels and the pressure chamber are arranged in a direction of gravitational force in this order.

11. The inkjet head according to claim 1 , wherein the ink inlet, the common chamber, the resistant walls, the discrete flow channels, the pressure chambers, and the nozzles are arranged in this order in the direction of gravity.

12. The inkjet head according to claim 1 , wherein the direction in which the pressure is applied in the pressure chambers is a direction perpendicular to the direction of gravity.

13. A coating apparatus, comprising:
the inkjet head according to claim 1 ;
a holding part that holds an object; and
a mechanism that causes relative movement between the inkjet head and the holding part.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Yamamoto Kenichi
• Fukada Kazuki
• Nakagawa Tohru
• Irie Kazunobu
• Kita Takeshi
• Yoshida Hidehiro

Classifications

• B05C5/00

  Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work (B05C7/00 takes precedence; essentially involving spraying or electrostatic projection B05B) · CPC title

• B41J2/14145 Primary

  Structure of the manifold · CPC title

• B41J2002/14419

  Manifold · CPC title

• B41J2/18

  Ink recirculation systems · CPC title

• B41J2/1433

  Structure of nozzle plates · CPC title