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US 6,578,956 B1Granted
Ink jet recording head and ink jet recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorKen Hosaka
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AssigneeCanon Kabushiki Kaisha
InventorKen Hosaka
Estimating the term…
A ink jet recording head has a discharge port forming member, an ink supply member for supplying ink into the discharge port forming member from an ink container, an ink discharge port formed by the discharge port forming member, and discharge pressure generation means for generating a discharge pressure for discharging ink from the discharge port. A discharge port forming face of the discharge port forming member and a face of the ink supply member are substantially coplanarly connected, and a protective member is adhered over both faces. The adhering area of the protective member per unit area of the ink supply member is smaller than that on the discharge port forming face.
An ink jet recording head comprising a discharge port forming member, an ink supply member for supplying ink to said discharge port forming member from an ink container, an ink discharge port formed by said discharge port forming member, and discharge pressure generation means for generating a discharge pressure for discharging ink from said discharge port, in which a discharge port forming face of said discharge port forming member and a face of said ink supply member are substantially coplanarly connected and a protective member is adhered over both faces,
An ink jet recording head comprising a discharge port forming member, an ink supply member for supplying ink to said discharge port forming member from an ink container, an ink discharge port formed by said discharge port forming member, and discharge pressure generation means for generating a discharge pressure for discharging ink from said discharge port, in which a discharge port forming face of said discharge port forming member and a face of said ink supply member are substantially coplanarly connected and a protective member is adhered over both faces,
Dependencies are inferred from the claim text.
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Ink supply systems ; Circuit parts therefor: ink cartridges
Ink cartridges: storage or packaging of ink cartridges
Protection of cartridges or parts thereof, e.g. tape: with means attached to the cartridge, e.g. protective cap
Typewriters
Term ended 28 Apr 2020 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
The present invention relates to an ink jet recording head and an ink jet recording apparatus capable of forming an image by discharging ink onto a recording medium, and is intended to ensure that when a protective member is peeled off from a recording head when the header is mounted on the recording apparatus, adhesive material is not deposited in the vicinity or periphery of the ink discharge port, since ink discharge failure can result from such adhesive material remaining in that vicinity.
Recording utilizing an ink jet system recording head is widely employed as an image recording apparatus for information communication equipment such as printers, plotters, copying apparatus, word processors, facsimile apparatus, etc. Among such ink jet systems, the so-called bubble jet system utilizing the pressure of a bubble generated by an electrothermal converting member (as disclosed in Japanese Patent Applications Laid-Open Nos. 61-59911 to 61-59914) has the advantages of easily achieving compactization of the apparatus and a high image density in the images produced using such a system.
Such a recording head has the possibility of causing unstable ink discharge, resulting in the deterioration of print quality, due to:
FIG. 1 is a cross-sectional view in the vicinity of the discharge port of an ink jet recording head of embodiment 1 of the present invention;
FIG. 2 is a view showing a surface irregularity pattern of a protective member for the ink jet recording head of an embodiment 1 of the present invention;
FIG. 3 is a cross-sectional view in the vicinity of the discharge port of an ink jet recording head of an embodiment 2 of the present invention;
Owing to the above-mentioned configurations, the present invention prevents, in peeling off the protective member by the user, the adhesive material from remaining in the vicinity of or around the discharge port, and thus easily and simply realizes improvement in the print quality and reliability without an increase in the cost of the component parts.
In the following the present invention will be clarified by description of the preferred embodiments thereof.
[Embodiment 1]