US4635079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single element transducer for an ink jet device
Assignee: Pitney Bowes Inc
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Filing: 1985-02-11
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Granted: 1987-01-06
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Expires: 2005-02-11
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 crystal and diaphragm. The one-piece member is practical because of the generally spherical configuration of the crystal.
Inventors
- 👤 David W. Hubbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:26
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/14; B41J2/14201; B41J2/14209; B41J2/14233; B41J2/14314; B41J2/16; B41J2/1621; B41J2/1632; B41J2002/14225; B41J2002/14379; B41J2002/14387; B41J2202/00; B41J2202/01; B41J2202/03
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 words
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 cavity; a recess 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; a crystal disposed upon said plate and extending over said cavity to form a chamber therewith, said crystal having a free standing convex configuration at the location of said cavity; and means for applying a voltage to said crystal; whereby, upon a voltage being applied to said crystal said convex portion of said crystal will shorten and contract into said chamber.
Claim 2
Dependent Claim
114 words
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 cavity; a recess 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; a crystal disposed upon said plate and extending over said cavity to form a chamber therewith, said crystal having a free standing convex configuration at the location of said cavity; and means for applying a voltage to said crystal; whereby, upon a voltage being applied to said crystal said convex portion of said crystal will shorten and contract into said chamber.
Claim 3
Dependent Claim
22 words
The device of claim 1 wherein said convex portion of said crystal has a narrower thickness than the balance of said crystal.
Claim 4
Dependent Claim
120 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 cavity; a recess 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 crystal disposed upon said plate and extending over said cavity to from a chamber therewith, said crystal having a free standing curvilinear configuration at the location of said cavity; means for supplying a voltage to said crystal; and means for grounding said plate; whereby, upon a voltage being to said crystal said curvilinear portion of said crystal will shorten and contract into said chamber.
Claim 5
Dependent Claim
120 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 cavity; a recess 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 crystal disposed upon said plate and extending over said cavity to from a chamber therewith, said crystal having a free standing curvilinear configuration at the location of said cavity; means for supplying a voltage to said crystal; and means for grounding said plate; whereby, upon a voltage being to said crystal said curvilinear portion of said crystal will shorten and contract into said chamber.
Claim 6
Dependent Claim
11 words
The device of claim 3 wherein said curvilinear configuration is convex.
Claim 7
Dependent Claim
15 words
The device of claim 4 wherein said convex configuration is directed away from said recess.
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) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |