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Liquid ejecting head and liquid ejecting apparatus
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A liquid ejection head, liquid technology, applied in printing and other directions, can solve different problems
Active Publication Date: 2020-07-07
SEIKO EPSON CORP
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Abstract
Description
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In addition, in the case where the channel resistance of each independent supply channel is different due to air bubbles, etc., the amount of liquid supplied to the liquid ejection part from the common supply channel via the independent supply channel may be different for each Depending on the liquid ejection part
Method used
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no. 1 approach
[0018] figure 1 It is a configuration diagram illustrating an example of a liquid ejection device 100A according to the first embodiment. The liquid discharge device 100A of the first embodiment is an inkjet printing device that discharges ink as an example of a liquid onto a medium 12 . The medium 12 is typically printing paper, but a printing object of any material such as a resin film or cloth may be used as the medium 12 . Such as figure 1 As illustrated in , the liquid container 14 for storing ink is provided in the liquid ejection device 100A. For example, an ink cartridge that can be attached to and detached from the liquid ejection device 100A, a pouch-shaped ink bag made of a flexible film, or an ink tank that can replenish ink can be used as the liquid container 14 .
[0019] Such as figure 1 As illustrated in , the liquid ejection device 100A includes a control unit 20 , a transport mechanism 22 , a movement mechanism 24 , a liquid ejection head 26 , and a chann...
no. 2 approach
[0052] A second embodiment will be described. In each of the following illustrations, for elements having the same functions as those of the first embodiment, the symbols used in the description of the first embodiment are used, and detailed descriptions thereof are omitted.
[0053] In the first embodiment, a case where the flow channel mechanism 28 supplies a fixed flow rate of ink to the liquid ejection head 26 is exemplified. The channel mechanism 28 of the second embodiment supplies ink at a constant pressure to the liquid ejection head 26 . That is, in the second embodiment, the flow rate of the ink supplied from the channel mechanism 28 to the liquid ejection head 26 is variable.
[0054] Image 6 It is a circuit diagram equivalently expressing the flow of ink in the liquid ejection head 26 during initial filling. exist Image 6 , with the previously shown Figure 5 Similarly, a case where the channel resistance of the filter F[4] increases is assumed. The ink at ...
no. 3 approach
[0061] In the first embodiment and the second embodiment, the structure in which the liquid ejection device 100A executes a cycle operation is illustrated, but the liquid ejection head 26 illustrated in the first embodiment or the second embodiment may also be used as an example. For liquid ejection devices that do not perform circulatory action. In the third embodiment, a liquid ejection head 26 is employed in a liquid ejection device that does not perform a circulation operation.
[0062] Figure 7 It is a schematic diagram illustrating the configuration of a liquid ejection device 100B in the third embodiment. Such as Figure 7 As exemplified in , the liquid ejection head 26 mounted on the liquid ejection device 100B of the third embodiment has the same configuration as that of the first embodiment or the second embodiment.
[0063] In the liquid ejection head 26, the pressure loss of each filter F[m] is relatively large. Therefore, if the circulation operation is not p...
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Abstract
The present invention provides a liquid ejecting head and a liquid ejecting apparatus that can reduce errors in the amount of liquid supplied to a plurality of liquid ejecting portions. A liquid ejecting head includes: a first liquid ejecting portion that ejects a liquid, a second liquid ejecting portion that ejects the liquid, a common supply flow path to which the liquid from a liquid reservoiris supplied, a first individual supply flow path that communicates the common supply flow path and the first liquid ejecting portion to each other, a second individual supply flow path that communicates the common supply flow path and the second liquid ejecting portion to each other, a first filter installed in the first individual supply flow path, and a second filter installed in the second individual supply flow path. In the liquid ejecting head, regarding flow path resistance in the first individual supply flow path, flow path resistance in the first filter is the largest, regarding flow path resistance in the second individual supply flow path, flow path resistance in the second filter is the largest, and the flow path resistance in the first filter and the flow path resistance in thesecond filter are the same.
Description
technical field [0001] The present invention relates to a liquid ejection head and a liquid ejection device. Background technique [0002] Conventionally, there has been proposed a technique for ejecting liquid such as ink from a nozzle. For example, Patent Document 1 discloses a structure in which liquid is circulated between a liquid container that stores liquid and a liquid ejection unit that ejects liquid from a nozzle. [0003] A configuration is assumed in which the liquid stored in the liquid container is supplied to a plurality of liquid ejection units. In the above structure, between the liquid container and each liquid ejection part, a common supply channel communicating with the liquid container, and each liquid ejection channel communicating with the common supply channel and the liquid ejection part are provided. The independent supply channel of the part. In a structure in which a filter for collecting foreign substances or air bubbles mixed in the liquid is...
Claims
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Application Information
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