Patent US4408214A successfully refreshed from Google Patents.
US4408214A
Expired / Lapsed
US
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Thermally regulated ion generation
Assignee: Delphax Systems Inc
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Filing: 1981-08-24
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Granted: 1983-10-04
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Expires: 2001-08-24
Abstract
Abstract Method and apparatus for ion generation with enhanced performance through operation at elevation temperatures. A glow discharge ion generator is subjected to extrinsic heating, both preliminarily and during continued operation, thereby providing increased ion current outputs. Such thermal control additionally prolongs the life of the ion generator by reducing corrosion and contaminant buildup.
Inventors
- 👤 Richard A. Fotland
- 👤 Leo A. Beaudet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:18
CPC Classifications
H; H01; H01J; H01J27/00; H01J27/02; G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/321; G03G15/323
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
69 words
A method of generating ions, comprising the steps of: applying a time-varying potential between a glow discharge device comprising a plurality of electrodes separated by a solid dielectric member, to generate ions in an air region at a junction of at least one of the electrodes and the solid dielectric member, and heating the glow discharge device to an elevated temperature above the intrinsic operating temperature of said device.
Claim 2
Independent Claim
69 words
A method of generating ions, comprising the steps of: applying a time-varying potential between a glow discharge device comprising a plurality of electrodes separated by a solid dielectric member, to generate ions in an air region at a junction of at least one of the electrodes and the solid dielectric member, and heating the glow discharge device to an elevated temperature above the intrinsic operating temperature of said device.
Claim 3
Dependent Claim
26 words
A method as defined in claim 1 wherein the heating step comprises heating the glow discharge device to a temperature in the range 130° F.-270° F.
Claim 4
Dependent Claim
21 words
A method as defined in claim 2 wherein the heating step comprises heating the glow discharge device to about 150° F.
Claim 5
Dependent Claim
18 words
A method as defined in claim 1 further comprising the step of extracting ions from said air region.
Claim 6
Dependent Claim
24 words
A method as defined in claim 4 wherein the applying and heating steps are effected for a period prior to initiating the extracting step.
Claim 7
Dependent Claim
25 words
A method as defined in claim 4 further comprising the step of applying the extracted ions to a further member to form an electrostatic image.
Claim 8
Dependent Claim
87 words
Improved apparatus for generating ions comprising a glow discharge device of the type including a solid dielectric member; a plurality of electrodes separated by the solid dielectric member, with an air region adjacent the junction of at least one of the electrodes and the solid dielectric member; and means for applying a time-varying potential between the electrodes to generate ions in the air region; wherein the improvement comprises means for heating the glow discharge device to an elevated temperature above the intrinsic operating temperature of said device.
Claim 9
Dependent Claim
87 words
Improved apparatus for generating ions comprising a glow discharge device of the type including a solid dielectric member; a plurality of electrodes separated by the solid dielectric member, with an air region adjacent the junction of at least one of the electrodes and the solid dielectric member; and means for applying a time-varying potential between the electrodes to generate ions in the air region; wherein the improvement comprises means for heating the glow discharge device to an elevated temperature above the intrinsic operating temperature of said device.
Claim 10
Dependent Claim
19 words
Apparatus as defined in claim 7, wherein the elevated temperature comprises a temperature in the range 130° F.-270° F.
Claim 11
Dependent Claim
14 words
Apparatus as defined in claim 8, wherein the elevated temperature comprises about 150° F.
Claim 12
Dependent Claim
15 words
Apparatus as defined in claim 7, wherein the solid dielectric member is comprised of mica.
Claim 13
Dependent Claim
16 words
Apparatus as defined in claim 10, wherein the solid dielectric member is comprised of Muscovite mica.
Claim 14
Dependent Claim
19 words
Apparatus as defined in claim 7 of the type further comprising means for extracting ions from said air region.
Claim 15
Dependent Claim
23 words
Apparatus as defined in claim 12 further comprising means for forming a latent electrostatic image on a further member with the extracted ions.
Claim 16
Dependent Claim
89 words
Improved apparatus for generating ions comprising a glow discharge device of the type including a solid dielectric member; first and second electrodes contacting opposite sides of the solid dielectric member, the first electrode including an edge surface; and means for applying a time-varying potential between the electrodes to generate ions in an air region adjacent the junction of the first electrode and the solid dielectric member; wherein the improvement comprises means for heating the glow discharge device to an elevated temperature above the intrinsic operating temperature of said device.
Claim 17
Dependent Claim
89 words
Improved apparatus for generating ions comprising a glow discharge device of the type including a solid dielectric member; first and second electrodes contacting opposite sides of the solid dielectric member, the first electrode including an edge surface; and means for applying a time-varying potential between the electrodes to generate ions in an air region adjacent the junction of the first electrode and the solid dielectric member; wherein the improvement comprises means for heating the glow discharge device to an elevated temperature above the intrinsic operating temperature of said device.
Claim 18
Dependent Claim
19 words
Apparatus as defined in claim 14, wherein the elevated temperature comprises a temperature in the range 130° F.-270° F.
Claim 19
Dependent Claim
14 words
Apparatus as defined in claim 15, wherein the elevated temperature comprises about 150° F.
Claim 20
Dependent Claim
15 words
Apparatus as defined in claim 14 wherein the solid dielectric member is comprised of mica.
Claim 21
Dependent Claim
16 words
Apparatus as defined in claim 17 wherein the solid dielectric member is comprised of Muscovite mica.
Claim 22
Dependent Claim
19 words
Apparatus as defined in claim 14 of the type further comprising means for extracting ions from said air region.
Claim 23
Dependent Claim
23 words
Apparatus as defined in claim 19 further comprising means for forming a latent electrostatic image on a further member with the extracted ions.
References Cited (Backward Citations)
US3665181A
Cited
US4155093A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |