US3662399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nozzle for ink jet and method for manufacturing the same
Assignee: Casio Computer Co Ltd
•
Filing: 1970-05-13
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Granted: 1972-05-09
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Expires: 1990-05-13
Abstract
Abstract An ink jet recording device has a movable writing head which involves at least one ink nozzle for ejecting a stream of ink jet to synthesize characters on the recording medium by controlling the stream of ink jet. Such kind of nozzle comprises a capillary made of a hard glass. Over the outer surface of the capillary a coating is deposited. This coating is selected from materials, such as silicones, which have water-repellent characteristic and large angle of contact. After the coating is deposited, the coated capillary is cut into desired length to fabricate the nozzle.
Inventors
- 👤 Takao Yanou
- 👤 Masaharu Urayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:48
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/015; B41J2/02; B05; B05B; B05B1/00; G; G01; G01D; G01D15/00; G01D15/16; G01D15/18; Y; Y10; Y10S; Y10S239/00; Y10S239/19
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
59 words
A nozzle according to claim 1, wherein said tube comprises a capillary member providing said capillary passageway and a coating of a highly water-repellent material on the outer circumference of said capillary member, said outer area of said end face being formed by said coating and said inner area of said end face being formed by said capillary member.
Claim 2
Dependent Claim
23 words
A nozzle according to claim 2, wherein said capillary member is composed of a hard glass and said coating is a silicone coating.
Claim 3
Dependent Claim
42 words
A nozzle according to claim 2, wherein said nozzle further comprises a protective sheath fitted about said tube in such a manner that the ink ejecting end of said tube extends beyond one end of said protective sheath by a predetermined distance.
Claim 4
Independent Claim
145 words
A method for fabricating a nozzle for ejecting ink jet droplets for use in an ink jet recording device, comprising the steps of: providing a capillary member having a capillary passageway, coating the outer circumference of said member with a highly water-repellent coating, said coating having a greater contact angle relative to an ink droplet than the contact angle of the material of which said member is composed, said capillary member being longer than the desired length of said nozzle, and cutting off the coated capillary member at a desired length after said coating has cured to form an end face having an outer area composed of said water-repellent coating surrounding an inner area composed of said member contiguous to a nozzle orifice from said passageway, whereby said outer area will have a greater contact angle relative to an ink droplet than said inner area.
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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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |