US4628333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink jet recording head and ink jet recorder
Assignee: Canon Inc
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Filing: 1984-12-07
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Granted: 1986-12-09
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Expires: 2004-12-07
Abstract
Abstract An ink jet recording head has a nozzle for discharging ink and an ink chamber for supplying ink to the nozzle. A valve mechanism actuated by a vacuum force is arranged in the ink chamber in which an air layer is created as the ink is supplied into the ink chamber.
Inventors
- 👤 Koji Terasawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:54
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/17; B41J2/175
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
48 words
An ink jet recording head comprising: a nozzle for discharging ink; an ink chamber for supplying ink to said nozzle; and a valve mechanism actuated by a vacuum arranged in said ink chamber, wherein an air layer is created in said ink chamber as ink is supplied thereto.
Claim 2
Dependent Claim
48 words
An ink jet recording head comprising: a nozzle for discharging ink; an ink chamber for supplying ink to said nozzle; and a valve mechanism actuated by a vacuum arranged in said ink chamber, wherein an air layer is created in said ink chamber as ink is supplied thereto.
Claim 3
Dependent Claim
33 words
An ink jet recording head according to claim 1 wherein said nozzle is closed by a cap and then opened by actuation of said valve mechanism by a vacuum from a vacuum source.
Claim 4
Dependent Claim
18 words
An ink jet recording head according to claim 1 wherein a filter is arranged near said valve mechanism.
Claim 5
Dependent Claim
22 words
An ink jet recording head according to claim 1 wherein said valve mechanism and said nozzle are constructed to effect vacuum suction.
Claim 6
Dependent Claim
89 words
An ink jet recorder comprising: an ink jet recording head including a nozzle for discharging ink, an ink chamber for supplying ink to said nozzle and a valve mechanism actuated by a vacuum arranged in said ink chamber, wherein an air layer is created in said ink chamber as ink is supplied thereto; a cap mechanism for closing said nozzle; and an air evacuation joint mechanism connected to a vacuum source for closing a vent hole that connects said vacuum source and said ink chamber through said valve mechanism.
Claim 7
Dependent Claim
89 words
An ink jet recorder comprising: an ink jet recording head including a nozzle for discharging ink, an ink chamber for supplying ink to said nozzle and a valve mechanism actuated by a vacuum arranged in said ink chamber, wherein an air layer is created in said ink chamber as ink is supplied thereto; a cap mechanism for closing said nozzle; and an air evacuation joint mechanism connected to a vacuum source for closing a vent hole that connects said vacuum source and said ink chamber through said valve mechanism.
Claim 8
Dependent Claim
18 words
An ink jet recorder according to claim 5 wherein the vacuum source is connected to said cap mechanism.
Claim 9
Dependent Claim
31 words
An ink jet recorder according to claim 6 wherein the vacuum suction path between said ink chamber and the vacuum source through said valve mechanism and said cap mechanism is switchable.
Claim 10
Dependent Claim
19 words
An ink jet recorder according to claim 5 wherein an exhaust ink reservoir is connected to the vacuum source.
Claim 11
Dependent Claim
22 words
An ink jet recorder according to claim 5 wherein said cap mechanism and said air evacuation joint mechanism are constructed in union.
Claim 12
Dependent Claim
29 words
An ink jet recording head according to claim 1, wherein said valve mechanism has an open position and a closed position and is caused to open by the vacuum.
Claim 13
Dependent Claim
29 words
An ink jet recording head according to claim 5, wherein said valve mechanism has an open position and a closed position and is caused to open by the vacuum.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-08 | 1990-06-09 | 1990-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-08 | 1994-06-09 | 1994-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-08 | 1998-06-09 | 1998-12-09 | $7700.00 | Window Closed / Lapsed |