US3354464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electrostatic printing of multiple copies
Assignee: Fujitsu Ltd
•
Filing: 1964-01-17
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Granted: 1967-11-21
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Expires: 1984-01-17
Abstract
No abstract record available.
Inventors
- 👤 Tsukatani Kenmi
- 👤 Nagamine Masaaki
- 👤 Hamada Yuji
- 👤 Takagi Kiyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:31
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/0202; G03G15/00; G03G15/22; G03G15/32; G03G15/321; G03G5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
THE METHOD OF ELECTRIC PRINTING BY ELECTROSTATICALLY PRODUCING A LATENT IMAGE ON INSULATING SHEET MATERIAL BETWEEN BACKING ELECTRODE MEANS AND PRINTING-FACE ELECTRODE MEANS AND THEREAFTER DEVELOPING A VISIBLE MEANS BY APPLYING DIELECTRIC COLORING SUBSTANCE TO THE IMAGE, WHICH COMPRISES SIMULTANEOUSLY PLACING A NUMBR OF SHEETS AS A SHEAF BETWEEN THE TWO ELECTRODES, EACH INDIVIDUAL SHEET COMPRISING A PAPER BASE COATED ON ONE SIDE WITH A LAYER OF DIELECTRIC RECORDING MATERIAL OF MORE THAN 10**13 OHMCM. SPECIFIC RESISTANCE, SAID DIELECTRIC RECORDING MATERIAL HAVING FINELY DISTRIBUTED SURFACE IRREGULARITIES OF A ROUGHNESS DEPTH BETWEEN 2 AND 20 MICRONS, APPLYING VOLTAGE BETWEEN THE ELECTRODES ACROSS THE THICKNESS OF THE SHEAF WHEREBY A LATENT ELECTROSTATIC CHARGE IMAGE IS FORMED SIMULTANEOUSLY ON THE COATING OF EACH SHEET, AND THEN SEPARATING THE SHEAF INTO INDIVIDUAL SHEETS PRIOR TO DEVELOPING THE VISIBLE IMAGES THEREON.
Claim 2
Independent Claim
136 words
THE METHOD OF ELECTRIC PRINTING BY ELECTROSTATICALLY PRODUCING A LATENT IMAGE ON INSULATING SHEET MATERIAL BETWEEN BACKING ELECTRODE MEANS AND PRINTING-FACE ELECTRODE MEANS AND THEREAFTER DEVELOPING A VISIBLE MEANS BY APPLYING DIELECTRIC COLORING SUBSTANCE TO THE IMAGE, WHICH COMPRISES SIMULTANEOUSLY PLACING A NUMBR OF SHEETS AS A SHEAF BETWEEN THE TWO ELECTRODES, EACH INDIVIDUAL SHEET COMPRISING A PAPER BASE COATED ON ONE SIDE WITH A LAYER OF DIELECTRIC RECORDING MATERIAL OF MORE THAN 10**13 OHMCM. SPECIFIC RESISTANCE, SAID DIELECTRIC RECORDING MATERIAL HAVING FINELY DISTRIBUTED SURFACE IRREGULARITIES OF A ROUGHNESS DEPTH BETWEEN 2 AND 20 MICRONS, APPLYING VOLTAGE BETWEEN THE ELECTRODES ACROSS THE THICKNESS OF THE SHEAF WHEREBY A LATENT ELECTROSTATIC CHARGE IMAGE IS FORMED SIMULTANEOUSLY ON THE COATING OF EACH SHEET, AND THEN SEPARATING THE SHEAF INTO INDIVIDUAL SHEETS PRIOR TO DEVELOPING THE VISIBLE IMAGES THEREON.
References Cited (Backward Citations)
US3210185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |