US3886565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection nozzle for an ink jet printer
Assignee: Toshiba Corp
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Filing: 1974-05-09
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Granted: 1975-05-27
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Expires: 1994-05-09
Abstract
Abstract An injection nozzle for an ink jet printer comprises a fine pipe for feeding ink therethrough onto a separately positioned paper under the control of an electric field, the one end of the pipe being faced toward the paper and being obliquely cut away through the axis thereof and having a sharp lead point to concentrate the electric field further cut from the sides of the cutting plane of the oblique cut.
Inventors
- 👤 Togo Kojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:59
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/16; G01D15/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
82 words
An injection nozzle for an ink jet printer, comprising a fine pipe having a longitudinal channel for feeding ink therethrough onto a separately positioned paper under the control of an electric field, one end of said pipe being tapered and cut away along an oblique plane toward and through the axis thereof to form a leading edge facing said paper, and both sides of said leading edge being further cut away to form a sharply pointed end for concentrating said electric field.
Claim 2
Dependent Claim
82 words
An injection nozzle for an ink jet printer, comprising a fine pipe having a longitudinal channel for feeding ink therethrough onto a separately positioned paper under the control of an electric field, one end of said pipe being tapered and cut away along an oblique plane toward and through the axis thereof to form a leading edge facing said paper, and both sides of said leading edge being further cut away to form a sharply pointed end for concentrating said electric field.
Claim 3
Dependent Claim
21 words
An injection nozzle according to claim 1, wherein said pipe is made of metal and said ink has an oily character.
Claim 4
Dependent Claim
56 words
An injection nozzle according to claim 1, wherein the outer diameter of said pipe is on the order of between 0.4 mm and 0.7 mm, the inner diameter is on the order of between 0.2 mm and 0.4 mm, and the gap between said pointed end and said paper is approximately between 1.0 and 4.0 mm.
Claim 5
Dependent Claim
30 words
An injection nozzle according to claim 1, wherein the cutting angle of said pipe to the axis thereof when obliquely cut is in the range of from 30* to 60*.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |