US4446371A
Expired / Lapsed
US
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Corona charging apparatus
Assignee: Delphax Systems Inc
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Filing: 1982-05-24
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Granted: 1984-05-01
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Expires: 2002-05-24
Abstract
Abstract A corona charging device including a dielectric-coated elongate conductor embedded in a slot in a conductive member. A high voltage varying potential between the elongate conductor and slotted conductive member induces a glow discharge in a region of proximity of the two conductors. The slotted conductor may act as a grounding member to provide a corona discharge device with respect to a proximate surface. Alternately, the slotted conductor may be maintained at a desired potential to provide a charging device with an automatically limited voltage. The slotted conductor and dielectric-coated conductor may be replaced with alternative structures which provide an equivalent enclosure.
Inventors
- 👤 Harold W. Cobb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:57
CPC Classifications
H; H01; H01T; H01T19/00
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
21 words
Apparatus for generating ions, the apparatus comprising: a corona electrode having an elongate conductor and a dielectric layer coating the conductor;
Claim 2
Dependent Claim
21 words
Apparatus for generating ions, the apparatus comprising: a corona electrode having an elongate conductor and a dielectric layer coating the conductor;
Claim 3
Dependent Claim
87 words
an elongate support structure defining a slot containing and supporting the corona electrode, the support structure including a base and electrically conductive sides having respective side walls which are substantially in contact with the corona electrode, a portion of the dielectric layer being exposed along the length of the slot; and a time-varying potential between the corona electrode and the electrically conductive sides for creating a glow discharge to form ions in an air region adjacent the exposed portion of the dielectric layer and said side walls.
Claim 4
Dependent Claim
87 words
an elongate support structure defining a slot containing and supporting the corona electrode, the support structure including a base and electrically conductive sides having respective side walls which are substantially in contact with the corona electrode, a portion of the dielectric layer being exposed along the length of the slot; and a time-varying potential between the corona electrode and the electrically conductive sides for creating a glow discharge to form ions in an air region adjacent the exposed portion of the dielectric layer and said side walls.
Claim 5
Dependent Claim
25 words
Apparatus as claimed in claim 1 in which the corona electrode is substantially in contact with the side walls intermediate the depth of the slot.
Claim 6
Dependent Claim
16 words
Apparatus as claimed in claim 1 in which the support structure is an electrically conductive beam.
Claim 7
Dependent Claim
21 words
Apparatus as claimed in claim 1 in which the base comprises a dielectric member which is coupled to the conductive sides.
Claim 8
Dependent Claim
12 words
Apparatus as claimed in claim 1 in which the sides are bars.
Claim 9
Dependent Claim
19 words
Apparatus as claimed in claim 1 in which the corona electrode protrudes outwardly beyond extremities of said side walls.
Claim 10
Dependent Claim
19 words
Apparatus as claimed in claim 1 in which the sides include outer surfaces forming corners with respective side walls.
Claim 11
Dependent Claim
20 words
Apparatus as claimed in claim 7 in which the corona electrode protrudes outwardly beyond the outer surface of said sides.
Claim 12
Dependent Claim
22 words
Apparatus as claimed in claim 7 in which the said outer surfaces are narrow when compared with the width of the slot.
Claim 13
Dependent Claim
19 words
Apparatus as claimed in claim 1 in which the dielectric layer has a thickness in the range 1-3 mils.
Claim 14
Dependent Claim
17 words
Apparatus as claimed in claim 1 in which the dielectric layer is of an inorganic dielectric material.
Claim 15
Dependent Claim
27 words
Apparatus as claimed in claim 11 in which the inorganic dielectric material is a material selected from the class consisting of glass, mica, and sintered ceramic material.
Claim 16
Dependent Claim
126 words
Apparatus for generating ions, the apparatus comprising: an elongate base of dielectric material extending axially; an elongate first electrode in contact with the base; a pair of elongate second electrodes supported by the base and extending axially one to either side of the first electrode; dielectric material extending axially between the first electrode and both of the second electrodes, wherein said dielectric material encases one of (a) the first electrode, and (b) each of the second electrodes; and is substantially in contact with and outwardly diverging from the other of (a) and (b), to define an air region; a time-varying potential between said first electrode and said pair of second electrodes for creating a glow discharge to generate a pool of ions in said air region.
Claim 17
Dependent Claim
126 words
Apparatus for generating ions, the apparatus comprising: an elongate base of dielectric material extending axially; an elongate first electrode in contact with the base; a pair of elongate second electrodes supported by the base and extending axially one to either side of the first electrode; dielectric material extending axially between the first electrode and both of the second electrodes, wherein said dielectric material encases one of (a) the first electrode, and (b) each of the second electrodes; and is substantially in contact with and outwardly diverging from the other of (a) and (b), to define an air region; a time-varying potential between said first electrode and said pair of second electrodes for creating a glow discharge to generate a pool of ions in said air region.
Claim 18
Dependent Claim
82 words
Apparatus for generating ions comprising: an elongate conductor; a dielectric sheath for said elongate conductor; a conductive enclosure for the sheathed elongate conductor, wherein said conductive enclosure includes inner walls proximately straddling or surrounding the sheathed elongate conductor with approximately zero gap therebetween, and further includes an opening to expose a surface portion of the sheathed elongate conductor coextensive with its axis; and a varying potential applied between said elongate conductor and said conductive enclosure in order to create a glow discharge.
Claim 19
Dependent Claim
82 words
Apparatus for generating ions comprising: an elongate conductor; a dielectric sheath for said elongate conductor; a conductive enclosure for the sheathed elongate conductor, wherein said conductive enclosure includes inner walls proximately straddling or surrounding the sheathed elongate conductor with approximately zero gap therebetween, and further includes an opening to expose a surface portion of the sheathed elongate conductor coextensive with its axis; and a varying potential applied between said elongate conductor and said conductive enclosure in order to create a glow discharge.
Claim 20
Independent Claim
89 words
The method of generating ions which comprises the steps of: providing a corona device comprising an elongate conductor, a dielectric sheath of the elongate conductor, and a conductive enclosure for the elongate conductor and dielectric sheath including inner walls proximately straddling or surrounding the elongate conductor with approximately zero gap therebetween, and an opening to expose a surface portion of the dielectric sheathed elongate conductor coextensive with its axis; and applying a varying potential between the elongate conductor and the conductive enclosure in order to create a glow discharge.
Claim 21
Independent Claim
89 words
The method of generating ions which comprises the steps of: providing a corona device comprising an elongate conductor, a dielectric sheath of the elongate conductor, and a conductive enclosure for the elongate conductor and dielectric sheath including inner walls proximately straddling or surrounding the elongate conductor with approximately zero gap therebetween, and an opening to expose a surface portion of the dielectric sheathed elongate conductor coextensive with its axis; and applying a varying potential between the elongate conductor and the conductive enclosure in order to create a glow discharge.
Claim 22
Independent Claim
139 words
A method of generating ions which comprises the steps of: providing a device for generating ions comprising a corona electrode having an elongate conductor and a dielectric layer coating the conductor, an elongate support structure defining a slot containing and supporting the corona electrode, the support structure straddling the electrode and including a base and electrically conductive sides having respective side walls adjacent the electrode intermediate the depth of the slot, the corona electrode being substantially in contact with the side walls of the support structure, and a portion of the dielectric layer being exposed along the length of the slot; and applying a time-varying potential between the corona electrode and the sides of the support structure to create a glow discharge resulting in pools of ions in an air region adjacent the conductive sides and the dielectric layer.
Claim 23
Independent Claim
139 words
A method of generating ions which comprises the steps of: providing a device for generating ions comprising a corona electrode having an elongate conductor and a dielectric layer coating the conductor, an elongate support structure defining a slot containing and supporting the corona electrode, the support structure straddling the electrode and including a base and electrically conductive sides having respective side walls adjacent the electrode intermediate the depth of the slot, the corona electrode being substantially in contact with the side walls of the support structure, and a portion of the dielectric layer being exposed along the length of the slot; and applying a time-varying potential between the corona electrode and the sides of the support structure to create a glow discharge resulting in pools of ions in an air region adjacent the conductive sides and the dielectric layer.
Claim 24
Dependent Claim
24 words
Apparatus as defined in claim 1 in which the air regions comprise outwardly enlarging spaces defined by said side walls and the corona electrode.
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) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |