US4027964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for interposition environment
Assignee: Xerox Corp
•
Filing: 1974-07-25
•
Granted: 1977-06-07
•
Expires: 1994-07-25
Abstract
Abstract An electrostatographic imaging method employing polar liquid development comprising developing an electrostatic charge pattern present on an electrostatographic imaging surface by first contacting said imaging surface with a thin dielectric web, developing said electrostatic latent image on said interposed dielectric web with a polar liquid developer and transferring said developer from said dielectric film to a receiver sheet in image configuration.
Inventors
- 👤 Joseph Fantuzzo
- 👤 Robert M. Ferguson
- 👤 John W. Weigl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:13
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/101; G03G15/102
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
117 words
Electrostatographic imaging apparatus comprising a path defining imaging surface and sequentially positioned with relationship to said path, means to form an electrostatic charge pattern on said imaging surface, means to substantially uniformly contact and maintain said contact with said imaging surface with a thin dielectric film, means to apply a polar liquid developer to the interposed thin dielectric film in image configuration in response to the electrostatic charge pattern on the imaging surface, conductive means to separate said thin dielectric film from said imaging surface with substantially no transfer of charge from said imaging surface to said thin dielectric film and means to transfer said liquid developer from said thin dielectric film to an image receiving surface.
Claim 2
Dependent Claim
117 words
Electrostatographic imaging apparatus comprising a path defining imaging surface and sequentially positioned with relationship to said path, means to form an electrostatic charge pattern on said imaging surface, means to substantially uniformly contact and maintain said contact with said imaging surface with a thin dielectric film, means to apply a polar liquid developer to the interposed thin dielectric film in image configuration in response to the electrostatic charge pattern on the imaging surface, conductive means to separate said thin dielectric film from said imaging surface with substantially no transfer of charge from said imaging surface to said thin dielectric film and means to transfer said liquid developer from said thin dielectric film to an image receiving surface.
Claim 3
Dependent Claim
19 words
Apparatus according to claim 1 further including means to discharge said imaging surface after separation of said dielectric film.
References Cited (Backward Citations)
US2829025A
Cited
US3013878A
Cited
US3013890A
Cited
US3084043A
Cited
US3284224A
Cited
US3703376A
Cited
US3697160A
Cited
US3820985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |