US4284993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-nozzle head for ink jet printer with ink supply pipe in ink chamber
Assignee: Ricoh Co Ltd
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Filing: 1980-02-13
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Granted: 1981-08-18
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Expires: 2000-02-13
Abstract
Abstract An ink jet head comprises a nozzle unit having a plurality of nozzles and a vibration unit having vibrating plates opposite to the nozzles. One or more ink distributing pipes having a plurality of ink outlets are arranged in parallel with the rectilinear nozzles, whereby the ink under uniform pressure is applied from the ink outlets of one or more pipes to the nozzles and the ink drops in the same size are jetted from the nozzles respectively.
Inventors
- 👤 Sadao Kakeno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:27
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/015; B41J2/02; B41J2/025
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
100 words
A multi-nozzle head for an ink jet printer comprising (a) a nozzle unit provided with nozzles spaced in a line from each of which the ink is jetted, (b) a vibration unit having a vibrating plate on which vibration elements are mounted opposite to said nozzles, (c) a chamber forming between a front wall provided with said nozzles of the nozzle unit and said vibrating plate, (d) at least one distributing pipe having a plurality of ink outlet ports arranged in parallel with the line of said nozzle in said chamber, said distributing pipe being connected to a supply pipe.
Claim 2
Dependent Claim
100 words
A multi-nozzle head for an ink jet printer comprising (a) a nozzle unit provided with nozzles spaced in a line from each of which the ink is jetted, (b) a vibration unit having a vibrating plate on which vibration elements are mounted opposite to said nozzles, (c) a chamber forming between a front wall provided with said nozzles of the nozzle unit and said vibrating plate, (d) at least one distributing pipe having a plurality of ink outlet ports arranged in parallel with the line of said nozzle in said chamber, said distributing pipe being connected to a supply pipe.
Claim 3
Dependent Claim
32 words
A multi-nozzle head for an ink jet printer as set forth in claim 1 wherein said ink outlet ports of said distributing pipe are directed to a side wall of said chamber.
Claim 4
Dependent Claim
36 words
A multi-nozzle head for an ink jet printer as set forth in claim 1 wherein a rectifying plate having a number of small holes is arranged between said nozzles and said at least one distributing pipe.
Claim 5
Dependent Claim
45 words
A multi-nozzle head for an ink jet printer as set forth in claim 1 having two distributing pipes arranged therein one of said distributing pipes is arranged in the upper portion of said chamber and the other distributing pipe is arranged in the lower portion.
Claim 6
Dependent Claim
35 words
A multi-nozzle head for an ink jet printer as set forth in claim 4 wherein said ink outlet ports of said two distributing pipes are directed to the upper and lower portions of said chamber.
Claim 7
Dependent Claim
34 words
A multi-nozzle head for an ink jet printer as set forth in claim 4 wherein two rectifying plates having a number of small holes are respectively arranged between said nozzles and said distributing pipes.
Claim 8
Dependent Claim
63 words
A multi-nozzle head for an ink jet printer as set forth in claim 4 wherein said ink outlet ports of the two distributing pipes are formed in such way so that the diameters of the ink outlet ports stepwisely become larger from the respective ends of the ink distributing pipes connected to said ink supply pipes to the tips of said distributing pipes.
Claim 9
Dependent Claim
35 words
A multi-nozzle head for ink jet printer as set forth in claim 7 wherein the ink outlet ports of one ink distributing pipes are positioned between ink outlet ports of the other ink distributing pipe.
References Cited (Backward Citations)
US4194210A
Cited
US4138687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |