Patent US4733447A successfully refreshed from Google Patents.
US4733447A
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Ink jet head and method of producing same
Assignee: Ricoh Co Ltd
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Filing: 1985-10-15
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Granted: 1988-03-29
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Expires: 2005-10-15
Abstract
Abstract An ink jet head includes a metallic nozzle member and a metallic ink chamber member which are bonded to each other by Joule effect with a thin metallic layer interposed therebetween. The metallic layer is deposited on a mirror-finished surface of the ink chamber member to make contact with a mirror-finished surface of the nozzle member in the event of bonding.
Inventors
- 👤 Yukihiro Ageishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:24
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/16; B41J2/1621; B41J2/1623; B23; B23K; B23K11/00; B23K11/002; B23K11/16; B23K11/20; B41J2/162; B41J2/1625; B41J2/1626; B41J2/1631; B41J2/1632; B41J2/164; B41J2/1643; B41J2/1646; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49401
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A method of producing an ink jet head, comprising the steps of: (a) forming at least one orifice for ink ejection through a flat nozzle member which includes a smooth surface; (b) smoothing a surface of an ink chamber member, which defines an ink chamber inclusive of an ink passageway, to form a smoothed surface which corresponds to said smooth surface of said flat nozzle member; and (c) bonding said nozzle member and said ink chamber member such that metallic bond is set up between the smoothed surface of the nozzle member and the smoothed surface of the ink chamber member by generating Joule heat by application of pressure and power, wherein a member having high resistivity is associated with the nozzle member to concentrate the heat generation to the nozzle member side.
Claim 2
Independent Claim
133 words
A method of producing an ink jet head, comprising the steps of: (a) forming at least one orifice for ink ejection through a flat nozzle member which includes a smooth surface; (b) smoothing a surface of an ink chamber member, which defines an ink chamber inclusive of an ink passageway, to form a smoothed surface which corresponds to said smooth surface of said flat nozzle member; and (c) bonding said nozzle member and said ink chamber member such that metallic bond is set up between the smoothed surface of the nozzle member and the smoothed surface of the ink chamber member by generating Joule heat by application of pressure and power, wherein a member having high resistivity is associated with the nozzle member to concentrate the heat generation to the nozzle member side.
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) | 1991-03-29 | 1991-09-28 | 1992-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-29 | 1995-09-28 | 1996-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-29 | 1999-09-28 | 2000-03-29 | $7700.00 | Window Closed / Lapsed |