US3983393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corona device with reduced ozone emission
Assignee: Xerox Corp
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Filing: 1975-06-11
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Granted: 1976-09-28
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Expires: 1995-06-11
Abstract
Abstract A corona generating device including an elongated corona electrode in the form of a thin wire to which a corona generating potential is applied. The wire is partially surrounded by a conductive corona shield which may be grounded. Intermediate the wire and shield and spaced apart from each are various configurations of ozone reducing members which partially surround the wire. These members are coated with a catalytic material which reacts with the ozone in an area as close as possible to the area in which it is generated, preferably in the corona glow region, and thus have been found to be more effective in reducing the ozone.
Inventors
- 👤 Raghulinga R. Thettu
- 👤 Phillip L. Harrison
- 👤 John Stavisky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:46
CPC Classifications
H; H01; H01T; H01T19/00; G; G03; G03G; G03G15/00; G03G15/02; G03G15/0258; G03G15/0291
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
52 words
A corona discharge device with reduced ozone emitting properties comprising an elongated wire electrode, an elongated shield, running parallel to said wire and spaced therefrom, electrical means for applying a corona generating potential to said wire, and an ozone decomposing means spaced from said wire and said shield and located intermediate therebetween.
Claim 2
Dependent Claim
52 words
A corona discharge device with reduced ozone emitting properties comprising an elongated wire electrode, an elongated shield, running parallel to said wire and spaced therefrom, electrical means for applying a corona generating potential to said wire, and an ozone decomposing means spaced from said wire and said shield and located intermediate therebetween.
Claim 3
Dependent Claim
18 words
The combination recited in claim 1 wherein said decomposing means is electrically isolated from said shield and wire.
Claim 4
Dependent Claim
28 words
The combination recited in claim 1 wherein said means comprises a plurality of thin strands coated with an ozone decomposing material, said strands running parallel to said wire.
Claim 5
Dependent Claim
15 words
The combination recited in claim 3 wherein said strands are made of a conductive material.
Claim 6
Dependent Claim
12 words
The combination recited in claim 3 wherein said strands are metallic wires.
Claim 7
Dependent Claim
14 words
The combination recited in claim 3 wherein said strands are made of non-conductive material.
Claim 8
Dependent Claim
22 words
The combination recited in claim 5 wherein said wires defining an open volume having a circular cross section enclosing said corona wire.
Claim 9
Dependent Claim
23 words
The combination recited in claim 7 wherein said wires define an open volume having a square shaped cross section enclosing said corona wire.
Claim 10
Dependent Claim
18 words
The combination recited in claim 1 wherein said means comprises a wire mesh coated with ozone decomposing material.
Claim 11
Dependent Claim
45 words
The combination recited in claim 1 wherein said means comprises a tube substantially enclosing said wire but for an arcuate opening for permitting passage of ions from the vicinity of said wire, said tube having coated on the interior surface thereof an ozone decomposing material.
Claim 12
Dependent Claim
14 words
The combination recited in claim 10 wherein said wire is located in said opening.
Claim 13
Dependent Claim
18 words
The combination recited in claim 10 wherein said wire is located on the longitudinal axis of said tube.
Claim 14
Dependent Claim
45 words
The combination recited in claim 10 wherein said shield includes a channel running the length thereof, and said tube has a diameter only slightly smaller than the width of said channel so as to approximately tough at several areas the interior surface of said shield.
Claim 15
Dependent Claim
28 words
The combination recited in claim 1 wherein said means comprises an elongated planar surface coated on at least the side facing said wire with an ozone decomposing material.
Claim 16
Dependent Claim
46 words
The combination recited in claim 14 wherein said device is supported adjacent a chargable surface, said shield has an opening for permitting the flow of charge from the wire to said surface, said planar surface being located on the side of said wire opposite said surface.
Claim 17
Dependent Claim
18 words
The combination recited in claim 1 wherein said ozone decomposing means is located within the corona glow region.
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) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |