US3955203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage deflection electrode apparatus for ink jet
Assignee: International Business Machines Corp
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Filing: 1975-01-24
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Granted: 1976-05-04
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Expires: 1995-01-24
Abstract
Abstract Vacuum cleaned high voltage deflection electrode apparatus may be utilized in conjunction with further deflection electrode means to establish an electrostatic deflection field for ink jet. The high voltage electrode includes a pair of parallel planar fine screens interposed between two rows of ink jet stream paths and has a vacuum between the screens. Two separate rows of ink jet orifices may cause two rows of ink jet streams to be formed which pass through two corresponding rows of charging electrodes to selectively charge the drops upon breakoff. The drops pass on opposite sides of the high voltage electrode through the deflection field which deflects the charged drops and not the uncharged drop for selectively impacting a gutter or for recording. Significant ink mist may be generated and may come into proximity to the high voltage electrode which is then drawn through the screens by the vacuum to prevent mist accumulation on the electrode.
Inventors
- 👤 Warren L. Chocholaty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:31
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/07; B41J2/075; B41J2/08; B41J2/09
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
99 words
In an ink jet head including means for generating two parallel rows of stream paths of selectively charged drops of conductive fluid and including a source of electric potential, deflection electrode apparatus comprising: support means; a pair of electrically conductive planar fine screens supported by said support means in parallel separate relationship and oriented parallel to and extending between said rows of drop stream paths and electrically connected to said source to establish electrostatic deflection fields for deflecting said charged drops outwardly from said screens; and vacuum means establishing a vacuum in the space between said pair of screens.
Claim 2
Dependent Claim
99 words
In an ink jet head including means for generating two parallel rows of stream paths of selectively charged drops of conductive fluid and including a source of electric potential, deflection electrode apparatus comprising: support means; a pair of electrically conductive planar fine screens supported by said support means in parallel separate relationship and oriented parallel to and extending between said rows of drop stream paths and electrically connected to said source to establish electrostatic deflection fields for deflecting said charged drops outwardly from said screens; and vacuum means establishing a vacuum in the space between said pair of screens.
Claim 3
Dependent Claim
23 words
The apparatus of claim 1 wherein said support means comprises: frame means for supporting said pair of screens in said parallel separate relationship.
Claim 4
Dependent Claim
26 words
The apparatus of claim 2 additionally comprising: outer deflection electrode means positioned on the opposite side of each said row of stream paths from said screens.
Claim 5
Dependent Claim
6 words
The apparatus of claim 3 wherein:
Claim 6
Dependent Claim
32 words
said electric potential source is additionally electrically connected between said screens and said outer deflection electrode means to establish electrostatic deflection fields therebetween for deflecting said charged drops outwardly from said screens.
Claim 7
Dependent Claim
32 words
said electric potential source is additionally electrically connected between said screens and said outer deflection electrode means to establish electrostatic deflection fields therebetween for deflecting said charged drops outwardly from said screens.
Claim 8
Dependent Claim
16 words
The apparatus of claim 2 wherein said frame means is positioned midway between said stream paths.
Claim 9
Dependent Claim
28 words
The apparatus of claim 5 wherein said frame means additionally includes an opening therein for communicating between said vacuum means and said space between said pair of screens.
Claim 10
Dependent Claim
24 words
The apparatus of claim 6 wherein said frame means is additionally adapted to seal said space between said pair of screens excepting said opening.
Claim 11
Dependent Claim
123 words
In an ink jet head including means for generating two parallel rows of stream paths of selectively charged uniform drops of conductive fluid, deflection electrode apparatus comprising: a pair of electrically conductive planar fine screens; a frame supporting said screens in parallel separate relationship to form a space therebetween and orienting said screens parallel to and midway between said rows of drop stream paths; a vacuum source communicating with said space between said pair of screens; an outer deflection electrode positioned on the opposite side of each said row of stream paths from said screens; and an electric potential source connected between said screens and said outer deflection electrodes to establish electrostatic deflection fields therebetween for deflecting charged drops outwardly from said screens.
Claim 12
Dependent Claim
123 words
In an ink jet head including means for generating two parallel rows of stream paths of selectively charged uniform drops of conductive fluid, deflection electrode apparatus comprising: a pair of electrically conductive planar fine screens; a frame supporting said screens in parallel separate relationship to form a space therebetween and orienting said screens parallel to and midway between said rows of drop stream paths; a vacuum source communicating with said space between said pair of screens; an outer deflection electrode positioned on the opposite side of each said row of stream paths from said screens; and an electric potential source connected between said screens and said outer deflection electrodes to establish electrostatic deflection fields therebetween for deflecting charged drops outwardly from said screens.
Claim 13
Dependent Claim
61 words
The apparatus of claim 8 wherein: said frame additionally includes an opening extending from said space between said pair of screens and is additionally adapted to seal said space between said pairs of screens excepting said opening; and additionally including a mounting element for supporting said frame and adapted for communicating between said vacuum source and said opening in said frame.
References Cited (Backward Citations)
US3373437A
Cited
US3701998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |