Patent US4641153A successfully refreshed from Google Patents.
US4641153A
Expired / Lapsed
US
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Notched piezo-electric transducer for an ink jet device
Assignee: Pitney Bowes Inc
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Filing: 1985-09-03
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Granted: 1987-02-03
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Expires: 2005-09-03
Abstract
Abstract The ink ejecting portion of an ink jet printer is described, wherein a single ceramic transducer is used to create the pressure for the ink droplets. Unlike prior devices, the transducer is a one-piece member as opposed to use of a piezoceramic material and diaphragm. The one-piece member is a piezoceramic material having a notch configuration at the location of each chamber.
Inventors
- 👤 Antonio S. Cruz-Uribe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:49
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/14; B41J2/14201; B41J2/14209; B41J2002/14379; B41J2002/14387
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
89 words
Ink ejecting portion of an ink jet print head, comprising: a plate; a cavity in said plate; a first channel in said plate extending from said said cavity; a manifold confluent with said first channel; a second channel in said plate extending from said cavity; an opening in said plate confluent with said second channel; and a piezoceramic sheet disposed upon said plate and extending over said cavity to form a chamber therewith, said piezoceramic sheet having a notched configuration in the vicinity of the walls of said cavity.
Claim 2
Dependent Claim
89 words
Ink ejecting portion of an ink jet print head, comprising: a plate; a cavity in said plate; a first channel in said plate extending from said said cavity; a manifold confluent with said first channel; a second channel in said plate extending from said cavity; an opening in said plate confluent with said second channel; and a piezoceramic sheet disposed upon said plate and extending over said cavity to form a chamber therewith, said piezoceramic sheet having a notched configuration in the vicinity of the walls of said cavity.
Claim 3
Dependent Claim
19 words
The device of claim 1 including means for supplying a charge to said piezoceramic sheet between said notched configuration.
Claim 4
Dependent Claim
35 words
The device of claim 1 wherein the ratio of the surface of said plate between said notched portion of said piezoceramic sheet and the distance between midpoints of opposed notched portions is equal to 0.6.
Claim 5
Dependent Claim
36 words
The device of claim 3 wherein the ratio of the height of said notched configuration relative to the distance from the bottom of said notched configuration and the bottom of said plate is equal to 0.6.
Claim 6
Dependent Claim
86 words
An ink ejecting portion of an ink jet printer, comprising: a plate; a cavity in said plate; a first channel in said plate extending from said said cavity; a manifold confluent with said first channel; a second channel in said plate extending from said cavity; an opening in said plate confluent with said second channel; and a piezoceramic sheet disposed upon said plate and extending over said cavity to form a chamber therewith, said piezoceramic sheet having a notch configuration in the vicinity of said cavity.
Claim 7
Dependent Claim
86 words
An ink ejecting portion of an ink jet printer, comprising: a plate; a cavity in said plate; a first channel in said plate extending from said said cavity; a manifold confluent with said first channel; a second channel in said plate extending from said cavity; an opening in said plate confluent with said second channel; and a piezoceramic sheet disposed upon said plate and extending over said cavity to form a chamber therewith, said piezoceramic sheet having a notch configuration in the vicinity of said cavity.
Claim 8
Dependent Claim
22 words
The device of claim 5 wherein said notch configuration is generally rectalinear and is generally aligned with the walls of said cavity.
Claim 9
Dependent Claim
22 words
The device of claim 4 including means for supplying a charge to the portion of said piezoceramic sheet intermediate said notch configuration.
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) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |