US3711859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrographic record system having a self spacing medium
Assignee: Gould Inc
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Filing: 1970-05-14
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Granted: 1973-01-16
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Expires: 1990-05-14
Abstract
Abstract There is provided an electrostatic recording system with voltage charging apparatus having charging electrodes and an electrographic record medium having spacer means, a portion of which projects above the outer surface of a dielectric layer of the record medium. The spacer means space the outer surface of the dielectric layer a fixed critical distance from the charging electrodes during the voltage charging operation.
Inventors
- 👤 A Brown
- 👤 J Blumenthal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:46
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/321; G03G15/325; G03G5/00; G03G5/02; G03G5/0202; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
157 words
In an electrostatic printing operation, a voltage charging system comprising: a charging head having a multiplicity of charging electrode means embedded in an insulator body, said charging electrode means connected at one end to voltage charging apparatus and the other end exposed to dissipate said electrical energy; a record medium having a conductive layer, and a dielectric layer, said dielectric layer having an outer surface exposed to said other exposed end of said charging electrodes, said outer surface capable of receiving and retaining an electrostatic charge; spacer means on said outer surface of said dielectric layer, said spacer means projecting above said outer surface of said dielectric layer for establishing a given space between the said outer surface of said dielectric layer and said charging electrode means during a recording operation; a voltage charge applied by said voltage charging apparatus to said charging electrodes resulting in a charged area of said outer surface of said dielectric layer.
Claim 2
Dependent Claim
157 words
In an electrostatic printing operation, a voltage charging system comprising: a charging head having a multiplicity of charging electrode means embedded in an insulator body, said charging electrode means connected at one end to voltage charging apparatus and the other end exposed to dissipate said electrical energy; a record medium having a conductive layer, and a dielectric layer, said dielectric layer having an outer surface exposed to said other exposed end of said charging electrodes, said outer surface capable of receiving and retaining an electrostatic charge; spacer means on said outer surface of said dielectric layer, said spacer means projecting above said outer surface of said dielectric layer for establishing a given space between the said outer surface of said dielectric layer and said charging electrode means during a recording operation; a voltage charge applied by said voltage charging apparatus to said charging electrodes resulting in a charged area of said outer surface of said dielectric layer.
Claim 3
Dependent Claim
117 words
An electrostatic charging system comprising, in combination: voltage generating means; a charging head having a multiplicity of charging electrode means embedded in an insulator body with one end of each said electrode means exposed; means connecting the opposite end of each of said electrode means to said voltage generating means; a record medium having a conductive layer and a dielectric layer, said dielectric layer having an outer surface; spacer means affixed to said dielectric layer and projecting above the surface thereof for establishing a given space between the outer surface of said dielectric layer and the exposed ends of said electrode means while said spacer means are in contact with said charging head during a recording operation.
Claim 4
Dependent Claim
117 words
An electrostatic charging system comprising, in combination: voltage generating means; a charging head having a multiplicity of charging electrode means embedded in an insulator body with one end of each said electrode means exposed; means connecting the opposite end of each of said electrode means to said voltage generating means; a record medium having a conductive layer and a dielectric layer, said dielectric layer having an outer surface; spacer means affixed to said dielectric layer and projecting above the surface thereof for establishing a given space between the outer surface of said dielectric layer and the exposed ends of said electrode means while said spacer means are in contact with said charging head during a recording operation.
Claim 5
Dependent Claim
37 words
An electrostatic charging system as set forth in claim 2, further characterized by said spacer means spacing said dielectric layer from the exposed ends of said electrode means by a distance of from 0.05 to 0.4 mils.
References Cited (Backward Citations)
US3500434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |