Patent US3967119A successfully refreshed from Google Patents.
US3967119A
Expired / Lapsed
US
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Corona charging device
Assignee: Xerox Ltd
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Filing: 1974-07-16
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Granted: 1976-06-29
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Expires: 1994-07-16
Abstract
Abstract A corona charging apparatus including a corona electrode and a surface to be charged, and a corona discharge control line, which may be insulative or conductive, and grounded or impressed with a voltage located adjacent to the corona electrode. The relative geometry of electrode and control line is variable, both angularly and spatially to control the charge pattern deposited on the surface.
Inventors
- 👤 Seiji Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:25
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/02; G03G15/0291
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
A corona charging apparatus for applying electrostatic charge to a charge surface including: a corona electrode disposed along a line in spaced relation to said charge surface and operatively connected to a source of voltage for the creation of corona and corona current to accumulate electrostatic charge on said charge surface a control wire disposed along a line in spaced relation to said corona electrode and at an oblique angle relative thereto so that successive increments of said control wire along the length thereof are differently spaced from said corona electrode, said control wire being selectively operatively connected to a source of voltage and to ground, whereby the presence of said control wire at varying distance from said corona electrode exerts variable effect on the corona current flowing therefrom to correspondingly vary the charge density on said charge surface.
Claim 2
Dependent Claim
139 words
A corona charging apparatus for applying electrostatic charge to a charge surface including: a corona electrode disposed along a line in spaced relation to said charge surface and operatively connected to a source of voltage for the creation of corona and corona current to accumulate electrostatic charge on said charge surface a control wire disposed along a line in spaced relation to said corona electrode and at an oblique angle relative thereto so that successive increments of said control wire along the length thereof are differently spaced from said corona electrode, said control wire being selectively operatively connected to a source of voltage and to ground, whereby the presence of said control wire at varying distance from said corona electrode exerts variable effect on the corona current flowing therefrom to correspondingly vary the charge density on said charge surface.
Claim 3
Dependent Claim
18 words
A corona charging device as defined in claim 1 in which said control wire is a conductive member.
Claim 4
Dependent Claim
18 words
A corona charging device as defined in claim 1 in which said control wire is an insulative member.
Claim 5
Dependent Claim
41 words
A corona charging device as defined in claim 1 and further including means to vary the angular orientation of said control wire relative to said corona electrode and means to vary the spacing between said control wire and said corona electrode.
Claim 6
Dependent Claim
24 words
A corona charging apparatus as defined in claim 1, further including means to vary the spacing between said corona electrode and said control wire.
Claim 7
Dependent Claim
25 words
A corona charging apparatus as defined in claim 1, further including means to vary the angular orientation between said corona electrode and said control wire.
References Cited (Backward Citations)
US3303401A
Cited
US3390266A
Cited
US3655966A
Cited
US3689767A
Cited
US3649830A
Cited
US3729649A
Cited
US3811048A
Cited
US3800153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |