US4056723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotatable corona device
Assignee: Xerox Corp
•
Filing: 1976-01-23
•
Granted: 1977-11-01
•
Expires: 1996-01-23
Abstract
Abstract A corona charging arrangement comprising a plurality of charging devices formed onto a unit. Each of the devices is rotatable to an operative position in which it is coupled to suitable terminals for applying energizing potential thereto, the operative position being selected so that charge therefrom is deposited on the imaging surface.
Inventors
- 👤 Brian E. Springett
- 👤 Dror Sarid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:42
CPC Classifications
H; H01; H01T; H01T19/00; G; G03; G03G; G03G15/00; G03G15/02; G03G15/0258; G03G15/0291
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
95 words
A corona charging arrangement for depositing charge on an imaging surface comprising: a plurality of corona discharge devices carried by a common member, each device comprising a corona electrode including a wire coated with a thick dielectric material sufficient to prevent the flow of conduction current therethrough, conductive biasing member carried by said common member, said electrode supported in contact with said biasing member, means for applying corona causing potentials to one of said devices, and means for moving said member to orient one of said plurality of devices for depositing charge on said surface.
Claim 2
Dependent Claim
95 words
A corona charging arrangement for depositing charge on an imaging surface comprising: a plurality of corona discharge devices carried by a common member, each device comprising a corona electrode including a wire coated with a thick dielectric material sufficient to prevent the flow of conduction current therethrough, conductive biasing member carried by said common member, said electrode supported in contact with said biasing member, means for applying corona causing potentials to one of said devices, and means for moving said member to orient one of said plurality of devices for depositing charge on said surface.
Claim 3
Dependent Claim
28 words
The combination recited in claim 1 further including means responsive to the movement of said member for de-energizing one of said devices and energizing another of said devices.
Claim 4
Dependent Claim
42 words
The combination recited in claim 1 wherein said member comprises an elongated polygonal support including a plurality of flat surfaces disposed in planes parallel to the longitudinal axis of said support, each of said devices associated with one of said flat surfaces.
Claim 5
Dependent Claim
16 words
The combination recited in claim 3 wherein said support is mounted for rotation about said axis.
Claim 6
Dependent Claim
20 words
The combination recited in claim 3 further including means for coupling corona generating potentials to said one of said devices.
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) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |