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Liquid ejection head and liquid ejection device

A liquid ejection head, liquid technology, applied in the direction of printing, inking device, etc., can solve problems such as change

Active Publication Date: 2019-11-26
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, temperature distribution may occur in liquid ejected from a plurality of ejection ports in the ejection port row, and the amount of ejected liquid may vary

Method used

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  • Liquid ejection head and liquid ejection device
  • Liquid ejection head and liquid ejection device
  • Liquid ejection head and liquid ejection device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0113] A first embodiment of the invention relates to the above reference Figure 1-21 Said structure for controlling the temperature of the liquid ejection head that circulates ink for each ejection port.

[0114] As described above, in the liquid ejection head, due to the ejection operation of ejecting the liquid by driving the heating element, heat is generated, which causes the temperature of the printing element board to rise. In addition, the temperature of the liquid ejection head may rise due to the temperature control itself of the liquid ejection head. In such an environment where the temperature rises, relatively low temperature liquid (ink) is supplied to the Figures 11A-11C and Figure 12 etc. Shown in the liquid supply path 18. In addition, as described above, in the present embodiment, three openings 21 are provided for one liquid supply path 18 . For this reason, among the plurality of ejection ports 13 lined up along the liquid supply path 18 , there are ...

no. 2 example

[0121] Figures 25A-25C is a diagram schematically showing the positional relationship among the opening 21, the heater, and the temperature sensor in the printing element board of the second embodiment of the present invention. Figure 25A A state where the printing element board 10 and the cover board 20 are separated from each other is shown. This embodiment corresponds to a mode in which only a liquid supply path is provided, that is, a mode in which ink is not circulated for the ejection ports 13 . The opening 21 is provided corresponding to the liquid supply path, and ink is supplied to the pressure chamber 23 and the ejection port 13 via the opening 21 . Such as Figure 25B As shown, the temperature adjustment region 101 includes a region corresponding to each opening 21 and a region where no opening 21 exists, and these regions are arranged along the row of discharge ports of the plurality of discharge ports 13 . Additionally, if Figure 25C As shown, a heater 102 ...

no. 3 example

[0124] Figure 26 is a diagram schematically showing the positional relationship among the openings 21a, 21b, the heater 102, and the temperature sensor 103 in the printing element board of the third embodiment of the present invention. This embodiment has substantially the same structure as that of the first embodiment, and is different from the first embodiment in the following points. In the first embodiment, the heater 102 and the temperature sensor 103 are arranged to correspond to the opening 21 a for ink to flow into the printing element board and the opening 21 b for ink to flow out of the printing element board. However, in this example, if Figure 26 As shown, a heater 102a and a temperature sensor 103a are additionally arranged in an area (area A) where no openings 21a, 21b exist on the end of the discharge outlet row.

[0125] Openings 21 for allowing ink to flow in are preferably present at both ends of the printing element board. However, if Figure 27 As sho...

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PUM

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Abstract

In a liquid ejection head, it is possible to suppress generation of a temperature distribution of liquid in a direction in which ejection openings are arranged in a print element board. Specifically, a liquid ejection head, which is provided with an ejection opening row in which a plurality of ejection openings for ejecting a liquid are arranged, includes a pressure chamber that communicates with the ejection openings and includes a pressure generation element, a passage which is provided with an opening and extends along the ejection opening row to supply the liquid flowing into the passage through the opening to the pressure chamber, a heater provided around the opening, and a temperature sensor provided in a region along the ejection opening row.

Description

technical field [0001] The present invention relates to a liquid ejection head and a liquid ejection device, and more particularly, to a structure for controlling the temperature of the liquid ejection head. Background technique [0002] In a liquid ejection head provided with a plurality of liquid ejection ports, the temperature of ink is made uniform with respect to each ejection port by controlling the temperature of the liquid ejection head. In this way, for example, variation in the amount of ink ejected from each ejection port is suppressed. [0003] On the other hand, as described in US Pat. No. 6,955,424, there is a liquid ejection head in which ejection orifice rows of different types of ink and individual flow paths along the respective ejection orifice rows are formed in the liquid ejection head. Headers are included with one of the print element boards. In this structure, liquid is supplied from each flow path to each discharge port of the corresponding dischar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/14
CPCB41J2/14B41J2/1404B41J2/14145B41J2/14153B41J2/155B41J2/18B41J2202/12B41J2202/20
Inventor 驹宫友美青木孝纲奥岛真吾森口拓人
Owner CANON KK