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AssigneeCanon Kabushiki Kaisha
InventorsTakatsugu Moriya, Ryohei Goto, Kazuhiro Yamada, Shuzo Iwanaga
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A liquid discharge head includes: a recording element substrate including a discharge port group for discharging liquid and a supply port for supplying the liquid to the discharge port group; a supporting member including a liquid chamber for storing the liquid therein, the supporting member being configured to support the recording element substrate; a flow path formed between the liquid chamber and the supply port and configured to allow the liquid to flow therethrough along a main surface of the recording element substrate on which the supply port opens; and a plurality of through holes communicating the liquid chamber with the flow path. A sum of opening areas of the plurality of through holes per unit area is greater in a region having relatively high temperature than that in a region having relatively low temperature in an in-plane direction of the main surface of the recording element substrate.
A liquid discharge head comprising:
Dependencies are inferred from the claim text.
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Structure thereof only for on-demand ink jet heads: structure of ink jet print heads with thermal bend detached actuators
Structure thereof only for on-demand ink jet heads: structure of nozzle plates
Typewriters
About 7 years 3 months of term left · ends 4 Feb 2034 (estimated)
1. Field of the Invention
The present invention relates to a liquid discharge head configured to discharge liquid such as ink and a recording apparatus including the liquid discharge head.
2. Description of the Related Art
FIG. 1A is a perspective view of a recording head according to a first exemplary embodiment. FIGS. 1B, 1C, and 1D are an A-A sectional view of FIG. 1A, a B-B sectional view of FIG. 1A, and a C-C sectional view of FIG. 1A, respectively.
FIG. 2A illustrates temperature distribution occurring on a main surface of a recording element substrate in the recording head according to the first exemplary embodiment. FIGS. 2B and 2C illustrate an effect of the flow of ink on the center and the end, respectively, of the main surface of the recording element substrate in the recording head according to the first exemplary embodiment. FIG. 2D is an A-A sectional view of FIG. 1A and illustrates another opening shape of a through hole.
FIG. 3A is a perspective view of a recording head according to a second exemplary embodiment. FIGS. 3B, 3C, and 3D are an A-A sectional view of FIG. 3A, a B-B sectional view of FIG. 3A, and a C-C sectional view of FIG. 3A, respectively.
Hereinafter, a general ink jet recording head (hereinafter, referred to as a recording head) configured to discharge ink as liquid will be described as an example of a liquid discharge head according to each exemplary embodiment of the present invention.
In the present invention, the term “recording” is not limited to only the forming of significant information such as characters and graphics. In other words, the term “recording” can refer to forming something meaningless. In addition, the term “recording” does not necessarily refer to forming something visualized and perceptible by human eye. Furthermore, the term “recording” is defined broadly to include forming an image, a design, and a pattern or the like on a recording material, and processing a recording material.
In the present invention, the term “recording material” is not limited to paper used in a general recording apparatus, but also include anything that is ink receptible, for example, cloth, a plastic film, a metal plate, glass, ceramics, wood, and leather.