US4752788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink jet recording head
Assignee: Fuji Electric Co Ltd
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Filing: 1986-09-04
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Granted: 1988-06-21
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Expires: 2006-09-04
Abstract
Abstract An ink jet recording head in which the ink in an ink cavity is jetted in the form of a droplet from an ink nozzle by utilizing a piezo-electric effect. The recording head includes a piezo-electric plate made of piezo-electric material and having a plurality of elongated ink cavities formed therein, and a cover plate fixedly placed on the piezo-electric plate. In one of the embodiments, each of the plurality of elongated ink cavities has two deep grooves formed in the longitudinal direction of the ink cavities and a shallow groove provided between the two deep grooves. Voltage applying electrodes are provided on piezo-electric portions which form the shallow grooves.
Inventors
- 👤 Takeshi Yasuhara
- 👤 Makoto Nishimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:40
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/16; B41J2/1621; B41J2/1623; B41J2/14; B41J2/14201; B41J2/14209; B41J2/1607; B41J2/1609; B41J2/1632; B41J2002/14225
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
101 words
An ink jet recording head in which the ink in an ink cavity is jetted in the form of a droplet from an ink nozzle by utilizing a piezo-electric effect, comprising: a piezo-electric plate made of piezo-electric material and having a plurality of elongated ink cavities formed therein, each of said plurality of elongated ink cavities has two deep grooves formed in the longitudinal direction of said ink cavities and a shallow groove provided between said two deep grooves; a cover plate fixedly placed on said piezo-electric plate; and voltage applying electrodes provided on piezo-electric portions which form said shallow grooves.
Claim 2
Dependent Claim
101 words
An ink jet recording head in which the ink in an ink cavity is jetted in the form of a droplet from an ink nozzle by utilizing a piezo-electric effect, comprising: a piezo-electric plate made of piezo-electric material and having a plurality of elongated ink cavities formed therein, each of said plurality of elongated ink cavities has two deep grooves formed in the longitudinal direction of said ink cavities and a shallow groove provided between said two deep grooves; a cover plate fixedly placed on said piezo-electric plate; and voltage applying electrodes provided on piezo-electric portions which form said shallow grooves.
Claim 3
Dependent Claim
34 words
An ink jet recording head as claimed in claim 1, wherein: ink nozzles are formed in said piezo-electric plate in such a manner that said ink nozzles are communicated with said ink cavities, respectively.
Claim 4
Dependent Claim
35 words
An ink jet recording head as claimed in claim 1, wherein: ink supplying inlets are formed in said piezo-electric plates in such a manner that said ink supplying inlets are communicated with said ink cavities.
References Cited (Backward Citations)
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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) | 1991-06-21 | 1991-12-21 | 1992-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-21 | 1995-12-21 | 1996-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-21 | 1999-12-21 | 2000-06-21 | $7700.00 | Window Closed / Lapsed |