Patent US4532861A successfully refreshed from Google Patents.
US4866460A
Expired / Lapsed
US
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Ink jet recording head and base plate therefor
Assignee: Canon Inc
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Filing: 1988-01-27
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Granted: 1989-09-12
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Expires: 2008-01-27
Abstract
Abstract This specification discloses a base plate for an ink jet recording head provided with an electrothermal converting member having a substrate, a pair of first electrodes provided at a predetermined interval on the substrate, a pair of second electrodes provided at an interval greater than the predetermined interval on the pair of first electrodes, and a heat generating resistance member electrically connected to the respective ones of the pairs of electrodes in at least a portion thereof. The specification also discloses an ink jet recording head having such base plate.
Inventors
- 👤 Atsushi Shiozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:56
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/14; B41J2/14016; B41J2/14088; B41J2/14112; B41J2/14129; B41J2002/14379
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
91 words
A base plate for an ink jet recording head comprising: a substrate; and electro-thermal converting means comprising a pair of first electrodes having a predetermined space therebetween and being disposed on said substrate, a heat generating resistance member provided on said pair of first electrodes and electrically connected to at least a portion of said first electrodes, and a pair of second electrodes having a space therebetween greater than said predetermined space between said first electrodes and being electrically connected to at least a portion of said heat generating resistance member.
Claim 2
Dependent Claim
91 words
A base plate for an ink jet recording head comprising: a substrate; and electro-thermal converting means comprising a pair of first electrodes having a predetermined space therebetween and being disposed on said substrate, a heat generating resistance member provided on said pair of first electrodes and electrically connected to at least a portion of said first electrodes, and a pair of second electrodes having a space therebetween greater than said predetermined space between said first electrodes and being electrically connected to at least a portion of said heat generating resistance member.
Claim 3
Dependent Claim
21 words
An ink jet recording head according to claim 1, further comprising a protection layer disposed on said pair of second electrodes.
Claim 4
Dependent Claim
17 words
An ink jet recording head according to claim 2, wherein said protection layer includes an organic material.
Claim 5
Dependent Claim
23 words
An ink jet recording head according to claim 2, wherein said protection layer comprises an inorganic material layer and an organic material layer.
Claim 6
Dependent Claim
103 words
An ink jet recording head having a discharge port for discharging ink therethrough and an electro-thermal converting member for generating heat energy utilized to discharge the ink, said electrothermal converting member comprising: a pair of first electrodes having a space therebetween and being disposed on a substrate, a heat generating resistance member provided on said first electrodes and electrically connected to at least a portion of said first electrodes, and a pair of second electrodes having a space therebetween greater than said predetermined space between said first electrodes and being electrically connected to at least a portion of said heat generating resistance member.
Claim 7
Dependent Claim
103 words
An ink jet recording head having a discharge port for discharging ink therethrough and an electro-thermal converting member for generating heat energy utilized to discharge the ink, said electrothermal converting member comprising: a pair of first electrodes having a space therebetween and being disposed on a substrate, a heat generating resistance member provided on said first electrodes and electrically connected to at least a portion of said first electrodes, and a pair of second electrodes having a space therebetween greater than said predetermined space between said first electrodes and being electrically connected to at least a portion of said heat generating resistance member.
Claim 8
Dependent Claim
23 words
An ink jet recording head according to claim 5, wherein said first electrodes and said heat generating resistance member include the same material.
Claim 9
Dependent Claim
21 words
An ink jet recording head according to claim 5, further comprising a protection layer disposed on said pair of second electrodes.
Claim 10
Dependent Claim
17 words
An ink jet recording head according to claim 7, wherein said protection layer includes an organic material.
Claim 11
Dependent Claim
23 words
An ink jet recording head according to claim 7, wherein said protection layer comprises an inorganic material layer and an organic material layer.
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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) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |