EP0424133A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Ink jet apparatus and ink jet cartridge and ink container mountable thereto
Assignee: Canon Inc
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Filing: 1990-10-18
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Granted: —
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Expires: 2010-10-18
Abstract
Abstract An ink jet head cartridge (C) includes a recording head (1) for ejecting ink; an ink container (13) for containing the ink to be supplied to the recording head (1); and air venting opening (13g) for communication between the container and ambience to allow supply of the ink from the container to the recording head; wherein the air venting opening (13g) is constituted by an outside opening and an inside opening and a passage (13f) connecting them, the passage has a length larger than a thickness of the ink container.
Inventors
- 👤 Mitsuru C/O Canon Kabushiki Kaisha Kurata
- 👤 Tokihide C/O Canon Kabushiki Kaisha Ebata
- 👤 Noribumi C/O Canon Kabushiki Kaisha Koitabashi
- 👤 Hiromitsu C/O Canon Kabushiki Kaisha Hirabayashi
- 👤 Hitoshi C/O Canon Kabushiki Kaisha Sugimoto
- 👤 Haruo C/O Canon Kabushiki Kaisha Uchida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 12:26
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/17; B41J2/175; B41J2/17503; B41J2/1752; B41J2/17513; B41J2/19
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
83 words
An ink jet head cartridge, comprising: a recording head for ejecting ink; an ink container for containing the ink to be supplied to said recording head; an air venting opening for communication between said container and ambience to allow supply of the ink from said container to said recording head; wherein said air venting opening is constituted by an outside opening and an inside opening and a passage connecting them, said passage has a length larger than a thickness of said ink container.
Claim 2
Dependent Claim
83 words
An ink jet head cartridge, comprising: a recording head for ejecting ink; an ink container for containing the ink to be supplied to said recording head; an air venting opening for communication between said container and ambience to allow supply of the ink from said container to said recording head; wherein said air venting opening is constituted by an outside opening and an inside opening and a passage connecting them, said passage has a length larger than a thickness of said ink container.
Claim 3
Dependent Claim
17 words
A cartridge according to Claim 1, wherein said passage is formed by joining members constituting said container.
Claim 4
Dependent Claim
11 words
A cartridge according to Claim 1, wherein said passage is bent.
Claim 5
Dependent Claim
17 words
A cartridge according to Claim 1, wherein said passage has a length of 15 - 150 mm.
Claim 6
Dependent Claim
22 words
A cartridge according to Claim 1, wherein said recording head includes elements for producing thermal energy to eject droplets of the ink.
Claim 7
Dependent Claim
36 words
An ink container, comprising: an ink containing portion for containing ink; an opening for communicating between said ink containing portion and ambience; a passage, optionally tubular, connecting the inside of said containing portion and said opening.
Claim 8
Dependent Claim
36 words
An ink container, comprising: an ink containing portion for containing ink; an opening for communicating between said ink containing portion and ambience; a passage, optionally tubular, connecting the inside of said containing portion and said opening.
Claim 9
Dependent Claim
30 words
An ink container according to claim 6, wherein said ink containing portion is filled with an ink absorbing material except for a neighborhood of another opening communicating with the passage.
Claim 10
Dependent Claim
19 words
An ink container according to claim 7, wherein the neighborhood is substantially at a center of said containing portion.
Claim 11
Dependent Claim
120 words
An ink jet recording apparatus, comprising: an ink jet head unit having an ink passage provided with energy generating element for generating energy contributable to ejecting ink; an ink container according to claim 6, 7 or 8, integrally formed as a unit with said ink jet head unit, having an ink containing portion for containing the ink to be supplied to said ink passage and having an opening for communication between an inside of said container and ambience; an air passage for communication between the inside of said ink containing portion to said opening; said ink jet head unit and said ink container constituting an ink jet head cartridge; and a member for mounting thereon said ink jet head cartridge.
Claim 12
Dependent Claim
18 words
An apparatus according to claim 9, wherein said energy generating element is electrothermal transducers element producing thermal energy.
Claim 13
Dependent Claim
14 words
An apparatus according to claim 9, wherein said mounting member is a reciprocable carriage.
Claim 14
Dependent Claim
159 words
An ink jet head cartridge, comprising: a recording head for ejecting ink; an ink container for containing the ink to be supplied to said recording head; an ink absorbing material made of porous material or fibrous material in said ink container, wherein an inside of said ink container is in communication with ambience to permit supply of the ink from said ink container to said recording head; and (a) a small chamber in communication with said ink absorbing material substantially at a center of said ink container, said small chamber being provided with a projected opening in communication with the ambience; and/or (b) wherein said absorbing material has a higher density adjacent ink supply port for supporting the ink from said container to said recording head, and has a decreasing density away from the supply port; a projection being provided for causing the region of high density of said ink absorbing material by engagement with said ink absorbing material.
Claim 15
Dependent Claim
159 words
An ink jet head cartridge, comprising: a recording head for ejecting ink; an ink container for containing the ink to be supplied to said recording head; an ink absorbing material made of porous material or fibrous material in said ink container, wherein an inside of said ink container is in communication with ambience to permit supply of the ink from said ink container to said recording head; and (a) a small chamber in communication with said ink absorbing material substantially at a center of said ink container, said small chamber being provided with a projected opening in communication with the ambience; and/or (b) wherein said absorbing material has a higher density adjacent ink supply port for supporting the ink from said container to said recording head, and has a decreasing density away from the supply port; a projection being provided for causing the region of high density of said ink absorbing material by engagement with said ink absorbing material.
Claim 16
Dependent Claim
41 words
A cartridge according to claim 12, wherein the opening is formed in a projection projected into said chamber from a wall of said ink container and is disposed substantially at a center of a space between defined by the small chamber.
Claim 17
Dependent Claim
18 words
A cartridge according to claim 12, wherein said recording head has a liquid ejection element using thermal energy.
Claim 18
Dependent Claim
22 words
A cartridge according to claim 12, wherein said chamber has a volume of 1/10 - 1/50 of a volume of said container.
Claim 19
Dependent Claim
23 words
A cartridge according to claim 12, wherein said projection has a volume of 1/4 - 1/40 of a volume of said small chamber.
Claim 20
Dependent Claim
76 words
A cartridge according to claim 12, wherein said ink absorbing material is of trapezoidal configuration having a longer side adjacent the ink supply port, when it is not set in said ink container, and by placing said ink absorbing material between said projection and a wall at the ink supply port side, the high density can be provided, and wherein said projection is effective to provide two flows of the ink to the ink supply port.
Claim 21
Dependent Claim
21 words
A cartridge according to claim 12, wherein the high density is 1.05 - 2 times a density of the other part.
Claim 22
Dependent Claim
24 words
An ink jet recording apparatus, comprising a cartridge according to any of claims 1-5 and 12-18, and a carriage for movably supporting said cartridge.
Claim 23
Dependent Claim
57 words
An ink container for use as part of an ink jet head cartridge having an ink containing portion and an expansion chamber into which ink can flow from the portion, and a vent pipe from the chamber to ambient, the length and diameter of the pipe being effective to prevent significant evaporation of ink from the portion.
Claim 24
Dependent Claim
57 words
An ink container for use as part of an ink jet head cartridge having an ink containing portion and an expansion chamber into which ink can flow from the portion, and a vent pipe from the chamber to ambient, the length and diameter of the pipe being effective to prevent significant evaporation of ink from the portion.
References Cited (Backward Citations)
No citation records indexed.
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