US4585322A
Expired / Lapsed
US
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Corona generating device
Assignee: Xerox Corp
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Filing: 1985-02-21
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Granted: 1986-04-29
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Expires: 2005-02-21
Abstract
Abstract A corona generating device for depositing negative charge on an imaging surface carried on conductive substrate comprises at least one elongated conductive corona discharge electrode, means to connect the electrode to a corona generating potential source, at least one element adjacent the corona discharge electrode capable of adsorbing nitrogen oxide species generated once the corona generating electrode is energized and capable of desorbing nitrogen oxide species once that electrode is not energized, the element being coated with a substantially continuous thin dehydrated alkaline film of an alkali silicate to neutralize the nitrogen oxide species when generated. In a preferred embodiment the corona discharge electrode comprises a thin wire coated at least in a discharge area with a dielectric material and at least one element comprises a conductive shield and an insulating housing having two sides adjacent the shield to define the longitudinal opening to permit ions emitted from the electrode to be directed toward a surface to be charged, both the shield and the two sides of the housing being coated with a substantially continuous thin dehydrated alkaline film of an alkali silicate.
Inventors
- 👤 Louis Reale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:45
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/02; G03G15/0258; G03G15/0291; H; H01; H01T; H01T19/00; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
112 words
A corona generating device for depositing a negative charge on an imaging surface carried on a conductive substrate held at a reference potential comprising; at least one elongated conductive corona discharge electrode supported between insulating end blocks, means to connect said electrode to a corona generating potential source, at least one element adjacent said corona discharge electrode capable of adsorbing nitrogen oxide species generated when said corona discharge electrode is energized and capable of desorbing nitrogen oxide species when said electrode is not energized, said at least one element being coated with a substantially continuous thin dehydrated alkaline film of an alkali metal silicate to neutralize the nitrogen oxide species when generated.
Claim 2
Dependent Claim
112 words
A corona generating device for depositing a negative charge on an imaging surface carried on a conductive substrate held at a reference potential comprising; at least one elongated conductive corona discharge electrode supported between insulating end blocks, means to connect said electrode to a corona generating potential source, at least one element adjacent said corona discharge electrode capable of adsorbing nitrogen oxide species generated when said corona discharge electrode is energized and capable of desorbing nitrogen oxide species when said electrode is not energized, said at least one element being coated with a substantially continuous thin dehydrated alkaline film of an alkali metal silicate to neutralize the nitrogen oxide species when generated.
Claim 3
Dependent Claim
60 words
The corona generating device of claim 1, wherein said dehydrated alkaline film is the dehydrated product of an aqueous sodium silicate solution having a silica to oxide weight ratio of from about 1.6 to about 3.75, density of form about 35° Be' to about 60° Be' at 20° C. and a viscosity of from about 200 to about 800 centipoises.
Claim 4
Dependent Claim
59 words
The corona generating device of claim 1, wherein said dehydrated alkaline film is the dehydrated product of an aqueous potassium silicate solution having a silica to oxide weight ratio from about 2.1 to 2.5, a density of from about 30° Be' to about 40° Be° at 20° C. and a viscosity of from about 7 to about 1050 centipoises.
Claim 5
Dependent Claim
14 words
The corona generating device of claim 3, wherein said silica oxide ratio is 2.5.
Claim 6
Dependent Claim
14 words
The corona generating device of claim 2, wherein said silica oxide ratio is 2.
Claim 7
Dependent Claim
20 words
The corona generating device of claim 1, wherein said silicate coating layer are at least about 5 microns in thickness.
Claim 8
Dependent Claim
46 words
The corona generating device of claim 1, wherein said at least one element comprises a conductive shield which substantially surrounds said corona discharge electrode and has a longitudinal opening therein to permit ions emitted from the electrode to be directed toward the surface to be charged.
Claim 9
Dependent Claim
41 words
The corona generating device of claim 1, wherein said corona discharge electrode comprises a thin wire coated at least in the dishcarge area with a dielectric material, and said conductive shield has means associated therewith to connect to a potential source.
Claim 10
Dependent Claim
75 words
The corona generating device of claim 7, wherein said shield is planar on one side of the corona discharge electrode and further including an insulating housing having two sides adjacent said shield to define a longitudinal opening to permit ions emitted from the electrode to be directed toward a surface to be charged, said two sides of said insulating housing being coated with a substantially continuous thin dehydrated alkaline film of an alkali metal silicate.
Claim 11
Dependent Claim
29 words
The corona generating device of claim 9, wherein said insulating housing includes two planar side elements which together with the shield enclose the corona discharge electrode on three sides.
Claim 12
Dependent Claim
13 words
The corona generating device of claim 8, wherein said dielectric material is glass.
Claim 13
Dependent Claim
33 words
The corona generating device of claim 10, further including power supply means for applying an A.C. corona generating voltage to said electrode and providing a D.C. potential between said substrate and said shield.
Claim 14
Dependent Claim
29 words
The corona generating device of claim 10, wherein said silicate coatings are at least 5 microns in thickness on said shield and said two sides of said insulating housing.
Claim 15
Dependent Claim
26 words
The corona generating device of claim 13, wherein said dielectric material has a thickness sufficient to prevent the flow of net D.C. current through said wire.
Claim 16
Dependent Claim
24 words
The corona generating device of claim 1, wherein said dehydrated alkaline film contains an amount of conductive particulate material to render the film conductive.
Claim 17
Dependent Claim
107 words
A corona generating device for depositing a negative charge on an imaging surface carried on a conductive substrate held at a reference potential comprising; at least one elongated conductive corona discharge electrode supported between insulating end blocks, means to connect said electrode to a corona generating potential source, at least one element adjacent said corona discharge electrode capable of adsorbing nitrogen oxide species generated when said corona discharge electrode is energized and capable of desorbing nitrogen oxide species when said electrode is not energized, said at least one element being coated with a substantially continuous thin dehydrated alkaline film to neutralize the nitrogen oxide species when generated.
Claim 18
Dependent Claim
107 words
A corona generating device for depositing a negative charge on an imaging surface carried on a conductive substrate held at a reference potential comprising; at least one elongated conductive corona discharge electrode supported between insulating end blocks, means to connect said electrode to a corona generating potential source, at least one element adjacent said corona discharge electrode capable of adsorbing nitrogen oxide species generated when said corona discharge electrode is energized and capable of desorbing nitrogen oxide species when said electrode is not energized, said at least one element being coated with a substantially continuous thin dehydrated alkaline film to neutralize the nitrogen oxide species when generated.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |