US3877038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode apparatus for a printer for electrostatic matrix printing
Assignee: US Philips Corp
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Filing: 1973-10-29
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Granted: 1975-04-08
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Expires: 1993-10-29
Abstract
Abstract A printer for electrostatic matrix printing, comprising a counter electrode, a space for a record carrier, a ceramic body with openings, and an electrode system consisting of conductor tracks between which spark gaps are formed which are situated in the prolongation of the openings.
Inventors
- 👤 Gerhard Krekow
- 👤 Klaus Witter
- 👤 Jurgen Schramm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:18
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/385; B41J2/41; B41J2/415
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
153 words
A printer for electrostatic matrix printing on an associated generally planar record carrier comprising: first and second image electrodes, a counter electrode in spaced relation to said image electrodes said image electrodes being electrically insulated with respect to each other, a ceramic body disposed intermediate said image electrodes in spaced relation to said counter electrode to permit movement of the record carrier therebetween, said body being provided with openings each having an axis extending perpendicular to the record carrier, said image electrodes each comprising a plurality of conductor tracks extending away from a narrow elongated gap each of said conductor tracks having an end face abutting said gap, each of said conductor tracks in one image electrode being disposed proximate to a conductor track in the other image electrode to define a spark gap, each of said spark gaps being disposed within an envelope defined by a projection of one of said openings.
Claim 2
Dependent Claim
153 words
A printer for electrostatic matrix printing on an associated generally planar record carrier comprising: first and second image electrodes, a counter electrode in spaced relation to said image electrodes said image electrodes being electrically insulated with respect to each other, a ceramic body disposed intermediate said image electrodes in spaced relation to said counter electrode to permit movement of the record carrier therebetween, said body being provided with openings each having an axis extending perpendicular to the record carrier, said image electrodes each comprising a plurality of conductor tracks extending away from a narrow elongated gap each of said conductor tracks having an end face abutting said gap, each of said conductor tracks in one image electrode being disposed proximate to a conductor track in the other image electrode to define a spark gap, each of said spark gaps being disposed within an envelope defined by a projection of one of said openings.
Claim 3
Dependent Claim
25 words
A printer as claimed in claim 1, characterized in that the conductor tracks are provided on a ceramic substrate by means of a thick-film technique.
Claim 4
Dependent Claim
14 words
The apparatus as described in claim 1 wherein each of said openings is cylindrical.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |