US3911447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrographic writing apparatus for a metallized strip recording medium using grounded electrodes between writing electrodes
Assignee: Robert Bosch GmbH
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Filing: 1974-05-08
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Granted: 1975-10-07
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Expires: 1994-05-08
Abstract
Abstract The electrodes of a burnout type electrographic apparatus are grounded during their idle period in order to clear any possible short circuit to an active electrode by the accumulation of metal particles or oxide whiskers which would otherwise cause more than one electrode to be simultaneously activated. An auxiliary grounding electrode is interposed between each pair of adjacent writing electrodes.
Inventors
- 👤 Alfred Ortlieb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:12
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/385; B41J2/425
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
Apparatus for writing on a recording medium having a metallic layer subject to electrical burnout marking on a carrier web, which apparatus comprises: a plurality of writing electrodes (21,31) insulated from each other arranged for simultaneous contact with the metallic layer of said recording medium, circuit means (25,37) for applying a burnout voltage during writing periods and a grounding potential during a non-writing period to the respective writing electrodes (21,31) and for applying a grounding potential continuously to the metallic layer along a line substantially equally spaced from said writing electrodes, and a plurality of continuously grounded electrodes (32) respectively located between each adjacent pair of writing electrodes and arranged to make contact with said metallic layer, whereby distortion of the record through inter-electrode short-circuits is prevented.
Claim 2
Dependent Claim
127 words
Apparatus for writing on a recording medium having a metallic layer subject to electrical burnout marking on a carrier web, which apparatus comprises: a plurality of writing electrodes (21,31) insulated from each other arranged for simultaneous contact with the metallic layer of said recording medium, circuit means (25,37) for applying a burnout voltage during writing periods and a grounding potential during a non-writing period to the respective writing electrodes (21,31) and for applying a grounding potential continuously to the metallic layer along a line substantially equally spaced from said writing electrodes, and a plurality of continuously grounded electrodes (32) respectively located between each adjacent pair of writing electrodes and arranged to make contact with said metallic layer, whereby distortion of the record through inter-electrode short-circuits is prevented.
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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |