US4472724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic image reproducing apparatus
Assignee: Konica Minolta Inc
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Filing: 1981-03-31
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Granted: 1984-09-18
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Expires: 2001-03-31
Abstract
Abstract An electrostatic recording apparatus comprising an ion modulator, a driving circuit for transforming a first image signal into a second image signal and for applying said second image signal to the ion modulator, a member for forming electrostatic latent image, and a photon coupled isolator. A voltage of the second image signal is higher than a voltage of the first image signal. The first image signal is supplied to the driving circuit through the photon coupled isolator. The ion modulator is a multilayered ion modulator comprising a layer of insulating material, a continuous layer of conductive material and a segmented layer of conductive material on the other side of said insulating layer. Each segment of the segmented conductive layer is insulatively isolated from each other segment. The multilayered ion modulator has at least one of row of apertures formed therethrough. A segment of the segmented conduction layer is formed around each aperture.
Inventors
- 👤 Ryubun Seimiya
- 👤 Shigeru Inowa
- 👤 Noriyoshi Tarumi
- 👤 Masahiko Matsunawa
- 👤 Hiroshi Tokunaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:48
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/321; G03G15/323
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
176 words
In an electrostatic recording apparatus of the type in which a signal source produces an image signal to be impressed upon an image receiving member to form an electrostatic latent image thereon through the means of an ion modulator, the improvement comprising a drive circuit receiving said produced image signal and transferring the same into a second image signal of substantially higher voltage than that of the first image signal, means applying said second image signal to said ion modulator, a photon coupled isolator connecting the source of the first image signal to said drive circuit, means maintaining said image receiving member at zero potential, whereby the high voltages from said drive circuit and applied to said ion modulator are isolated from both the signal source and said member, control means producing a timing signal applied to said drive circuit, and a second photon coupled isolator connecting said control means to said drive circuit, whereby the high voltage emanating from said drive circuit and applied to said ion modulator is likewise isolated from said control means.
Claim 2
Dependent Claim
176 words
In an electrostatic recording apparatus of the type in which a signal source produces an image signal to be impressed upon an image receiving member to form an electrostatic latent image thereon through the means of an ion modulator, the improvement comprising a drive circuit receiving said produced image signal and transferring the same into a second image signal of substantially higher voltage than that of the first image signal, means applying said second image signal to said ion modulator, a photon coupled isolator connecting the source of the first image signal to said drive circuit, means maintaining said image receiving member at zero potential, whereby the high voltages from said drive circuit and applied to said ion modulator are isolated from both the signal source and said member, control means producing a timing signal applied to said drive circuit, and a second photon coupled isolator connecting said control means to said drive circuit, whereby the high voltage emanating from said drive circuit and applied to said ion modulator is likewise isolated from said control means.
Claim 3
Dependent Claim
87 words
An electrostatic recording apparatus as set forth in claim 1, in which said ion modulator is a multilayered ion modulator comprising a layer of insulating material, a continuous layer of conductive material and a segmented layer of conductive material on the other side of said insulating layer, each segment of the segmented conductive layer being insulatively isolated from each other segment, said multilayered ion modulator having at least one of row of apertures formed therethrough, a segment of the segmented conduction layer being formed around each aperture.
Claim 4
Dependent Claim
22 words
An electrostatic recording apparatus as set forth in claim 1, wherein the photon coupled isolator is a high speed photon coupled isolator.
References Cited (Backward Citations)
US3751671A
Cited
US4268160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |