US5493319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of restoring ink ejection by heating an jet head before cleaning
Assignee: Canon Inc
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Filing: 1994-04-05
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Granted: 1996-02-20
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Expires: 2014-04-05
Abstract
Abstract An ink jet recording apparatus for recording information by ejecting ink fluid on a recording medium includes a recording head, a cap, an ejection restoration mechanism, an atmospheric air opening mechanism and a heating mechanism. The recording head has an orifice and ejects ink fluid from the orifice. The cap covers up a face on which the orifice of the recording head is disposed. The ejection restoration mechanism performs procedures for keeping a state of ejection of ink fluid by the recording head to be good by discharging ink fluid into the cap. The atmospheric air opening mechanism makes an inside of the cap opened to an atmospheric air when the restoration operations are being performed by the ejection restoration mechanism. The heating mechanism heats the recording head at least before the restoration operation is performed by the ejection restoration mechanism.
Inventors
- 👤 Hiromitsu Hirabayashi
- 👤 Naoji Ohtsuka
- 👤 Kentaro Yano
- 👤 Hitoshi Sugimoto
- 👤 Miyuki Matsubara
- 👤 Kiichiro Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:05
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/165; B41J2/16517; B41J2/16535; B41J2/16538
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
122 words
An ejection restoration method for an ink jet apparatus including an ink jet head with a face having an ejection orifice for ejecting ink using thermal energy produced by a heating element and a cap member for covering said face, said method comprising the steps of: covering said face with said cap member; producing with said heating element thermal energy to a degree such that ink is not ejected, while said cap member covers said face; ejecting ink from said ejection orifice into said cap member, while said cap member covers said face; and cleaning said face by removing ink therefrom when said cap member is separated from said face, wherein at least said producing step is performed before said cleaning step.
Claim 2
Dependent Claim
122 words
An ejection restoration method for an ink jet apparatus including an ink jet head with a face having an ejection orifice for ejecting ink using thermal energy produced by a heating element and a cap member for covering said face, said method comprising the steps of: covering said face with said cap member; producing with said heating element thermal energy to a degree such that ink is not ejected, while said cap member covers said face; ejecting ink from said ejection orifice into said cap member, while said cap member covers said face; and cleaning said face by removing ink therefrom when said cap member is separated from said face, wherein at least said producing step is performed before said cleaning step.
Claim 3
Dependent Claim
25 words
A method as claimed in claim 1, wherein a space formed between said cap member and said face communicates with atmosphere during said electing step.
Claim 4
Dependent Claim
25 words
A method as claimed in claim 2, wherein said producing step is performed when at least four hours have passed after a preceding ejection restoration.
Claim 5
Dependent Claim
18 words
A method as claimed in claim 2, wherein said producing step is performed before an ejection restoration operation.
Claim 6
Dependent Claim
38 words
A method as claimed in claim 1, wherein a step of producing with said heating element thermal energy such that ink is not ejected or a step of ejecting ink from said ejection orifice follows said cleaning step.
Claim 7
Dependent Claim
35 words
A method as claimed in claim 1, wherein a temperature achieved in said producing step is higher than a temperature achieved during an operation in which ink is ejected from said ejection orifice for recording.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-02-19 | 1999-08-21 | 2000-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-19 | 2003-08-21 | 2004-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-19 | 2007-08-21 | 2008-02-20 | $7700.00 | Window Closed / Lapsed |