US3611418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic recording device
Assignee: Panasonic Holdings Corp
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Filing: 1968-09-30
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Granted: 1971-10-05
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Expires: 1988-09-30
Abstract
Abstract An electrostatic recording device comprising a cathode-ray tube having a thin film window opposite its electron gun, an electrode spaced from the thin film window, an electrostatic recording sheet disposed adjacent the face of the electrode toward the thin film window, a DC power supply connected between the thin film and the electrode to supply a positive voltage to the latter, and means to multiply the number of electrons between the thin film and the recording sheet by ionizing a gas disposed therebetween.
Inventors
- 👤 Yoshihiro Uno
- 👤 Hidehiko Kawakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:21
CPC Classifications
G; G03; G03G; G03G9/00; G03G15/00; G03G15/22; G03G15/32; G03G15/321; H; H01; H01J; H01J31/00; H01J31/02; H01J31/06; H01J31/065; H01J5/00; H01J5/02; H01J5/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
121 words
An electrostatic recording device comprising a cathode-ray tube having a thin film window opposite its electron gun; electrode means disposed in spaced relationship with said thin film; an electrostatic recording sheet spaced from said thin film and positioned adjacent the face of said electrode means towards the thin film; and DC supply means connected between said thin film and said electrode means to supply a positive voltage to said electrode means; and means to form an electrostatic charge on said recording sheet, including means to multiply the number of electrons by ionization of a gas between said thin film and said recording sheet dependent upon the number of incident electrons passing through said thin film for deposition on said recording sheet.
Claim 2
Dependent Claim
16 words
A recording device as claimed in claim 2 wherein said thin film comprises a metal oxide.
Claim 3
Dependent Claim
16 words
A recording device as claimed in claim 3 wherein said thin film comprises a semiconductor oxide.
Claim 4
Dependent Claim
35 words
A recording device as claimed in claim 2 having means for applying a developing material to the charge image to obtain a developed image, and means for transfer-printing the developed image to a recording sheet.
Claim 5
Dependent Claim
45 words
A recording device as claimed in claim 5 in which the recording sheet has the form of rotatable drum means for carrying the outer surface thereof successively past a window in said thin film, the means for applying the developing material and the transfer-printing means.
Claim 6
Dependent Claim
28 words
A recording device as claimed in claim 5 wherein said transfer-printing means comprises electrode means for attracting the toner image to a record member from the recording sheet.
Claim 7
Dependent Claim
46 words
A recording device as claimed in claim 5, having means to carry the inner surface of said recording sheet in the form of a thin endless tape successively past a window in said thin film, the means for applying the developing material and the transfer-printing means.
Claim 8
Dependent Claim
36 words
A recording device as claimed in claim 8, wherein said recording sheet has temperature-dependent semiconductive properties, said device further comprising heater means for rendering said sheet conductive to dissipate any residual electric charge after the transfer-printing.
Claim 9
Dependent Claim
35 words
A recording device as claimed in claim 8, wherein said recording sheet is photoconductive, said device further comprIsing light source means for rendering said sheet conductive to dissipate any residual electric charge after the transfer-printing.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |