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Liquid ejecting apparatus

A technology of jetting device and liquid jetting head, applied in printing and other directions, can solve the problems of difficult to maintain stable head jetting head, complicated structure, etc.

Active Publication Date: 2018-09-07
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned printer, since a pressurizing pump or the like is provided for pressurizing and discharging the ink from the nozzle, the structure becomes complicated.
In addition, during pressurized wiping, complex control such as changing the timing of closing the atmosphere release valve of each sub tank is required, and it may be difficult to maintain a stable head discharge head.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0027] The liquid ejecting device 1 of the present embodiment includes: a liquid ejecting head 10, a nozzle 12, a first tank 21, a second tank 22, a liquid level detection unit 24, a circulation path 30, a pump 32, a first main tank 41, a first supply Flow passage 51, second supply flow passage 52, first on-off valve 61, second on-off valve 62, first atmosphere opening valve 71, second atmosphere opening valve 72 ( figure 1 reference).

[0028] The liquid jet head 10 is connected to the upstream first tank 21 and the downstream second tank 22 through the circulation path 30 , and ejects a predetermined amount of ink from the nozzles 12 toward a medium such as printing paper at a predetermined timing. The liquid jet head 10 is disposed vertically below the first tank 21 and vertically above the second tank 22 (see figure 1 ).

[0029] The first tank 21 is a tank for storing ink supplied to the liquid ejection head 10 , and is connected to the first main tank 41 through the fi...

no. 2 approach

[0048] In the liquid ejecting device 1, the second supply channel 52 may be branched in the middle of the first supply channel 51, or the first supply channel 51 may be branched in the middle of the second supply channel 52. structure. The liquid ejecting device 1 of the present embodiment has a structure in which the second supply channel 52 branches off from the branch portion 51 a of the first supply channel 51 and communicates with the second tank 22 (see figure 2 ).

[0049] According to the liquid ejecting device 1 of the present embodiment, a part of the first supply channel 51 and a part of the second supply channel 52 can be shared.

no. 3 approach

[0051] The liquid ejecting device 1 of the present embodiment includes a second main tank 42, a third supply channel 53, and a third on-off valve 63 (see image 3 ).

[0052] The second main tank 42 is a tank for supplying the stored ink to the second tank 22 , and is arranged at a position vertically above the second tank 22 . In the middle of the third supply flow path 53 connecting the second main tank 42 and the second tank 22 , a third on-off valve 63 is provided.

[0053] In this liquid ejection device 1, by opening at least one of the second on-off valve 62 and the third on-off valve 63 in a state in which the first on-off valve 61 is closed, the liquid from the first main tank 41 and the first main tank 41 can be opened. At least one of the second main tanks 42 supplies ink to the second tank 22 . In addition, according to the liquid ejecting device 1 of this embodiment, it is also possible to simultaneously supply ink from a plurality of main tanks, that is, the fir...

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PUM

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Abstract

A liquid ejecting apparatus (1) includes: a liquid ejecting head (10) that ejects liquid to a medium from a nozzle (12); a first tank (21) that is configured above the liquid ejecting head (10) and stores the liquid to be supplied to the liquid ejecting head; a second tank (22) that is configured below the liquid ejecting head and receives the liquid that was not ejected from the liquid ejecting head; circulation paths (30) through which the liquid circulates among the first tank, the liquid ejecting head, and the second tank; a pump (32) that feeds the liquid from the second tank to the firsttank; a first supply flow path (51) that communicates between the first tank and a first main tank that is located above the first tank and stores the liquid; a second supply flow path (52) that communicates between the first main tank and the second tank; a first opening / closing valve (61) that can open and close the first supply flow path; and a second opening / closing valve (62) that can open and close the second supply flow path.

Description

technical field [0001] The present invention relates to a liquid ejection device. Background technique [0002] In an inkjet printer (hereinafter also simply referred to as a printer), an image is printed on a medium by ejecting ink from nozzles formed in a liquid ejection head. In the liquid ejection head, the interior is set to a slight negative pressure, an ink meniscus is formed in the nozzle, and ink is ejected from the nozzle by generating a predetermined pressure in the pressure portion. [0003] In the liquid ejection head, there are cases where the meniscus is broken due to foreign substances adhering to the nozzles, air bubbles being mixed into the nozzles, and the like. At this time, in order to re-form the meniscus, after foreign matter and air bubbles are removed by a maintenance operation, that is, an operation called pressure cleaning, which applies positive pressure to the pressure chamber to force ink to overflow from the nozzle, perform The action called ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/01B41J2/175
CPCB41J2/01B41J2/17503B41J2/16526B41J2/16535B41J2/175B41J2/17566B41J2/18B41J2/16523B41J2/1707B41J2/17596
Inventor 中村浩之野泽泉
Owner SEIKO EPSON CORP
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