US3299809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic printing process for use with printing plate having plural levels
Assignee: Continental Can Co Inc
•
Filing: 1964-11-05
•
Granted: 1967-01-24
•
Expires: 1984-11-05
Abstract
No abstract record available.
Inventors
- 👤 Laszlo J Javorik
- 👤 Edward D Higgins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:59
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/163; G03G13/00; G03G13/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
THE METHOD OF ELECTROSTATIC PRINTING, WHICH COMPRISES PREPARING A PRINTING PLATE OF CONDUCTIVE MATERIAL HAVING RAISED IMAGE AREAS AND RECESSED BACKGROUND OR NONPRINTING AREAS, HOLDING THE PLATE AT ONE POLARITY AND APPLYING TO BOTH THE RAISED IMAGE AREAS AND RECESSED BACKGROUND AREAS A TONER COMPRISING PARTICLES CHARGED TO THE OPPOSITE POLARITY, BRINGING A SUBSTRATE TO BE PRINTED TO A POSITION OPPOSITE TO THE RAISED AND RECESSED AREAS OF THE PLATE, AND APPLYING A POTENTIAL DIFFERENCE BETWEEN THE SUBSTRATE AND THE PLATE WHICH ESTABLISHES FORCES UPON THE TONER PARTICLES ON RAISED AREAS OF THE PLATE ADEQUATE TO CAUSE THE PARTICLES TO LEAVE THE SAME, SAID POTENTIAL DIFFERENCE BEING SELECTED TO BE TOO LOW TO ESTABLISH FORCES UPON THE TONER PARTICLES ON RECESSED AREAS OF THE PLATE ADEQUATE TO CAUSE THE LATTER TONER PARTICLES TO LEAVE THE RECESSED AREAS.
Claim 2
Independent Claim
137 words
THE METHOD OF ELECTROSTATIC PRINTING, WHICH COMPRISES PREPARING A PRINTING PLATE OF CONDUCTIVE MATERIAL HAVING RAISED IMAGE AREAS AND RECESSED BACKGROUND OR NONPRINTING AREAS, HOLDING THE PLATE AT ONE POLARITY AND APPLYING TO BOTH THE RAISED IMAGE AREAS AND RECESSED BACKGROUND AREAS A TONER COMPRISING PARTICLES CHARGED TO THE OPPOSITE POLARITY, BRINGING A SUBSTRATE TO BE PRINTED TO A POSITION OPPOSITE TO THE RAISED AND RECESSED AREAS OF THE PLATE, AND APPLYING A POTENTIAL DIFFERENCE BETWEEN THE SUBSTRATE AND THE PLATE WHICH ESTABLISHES FORCES UPON THE TONER PARTICLES ON RAISED AREAS OF THE PLATE ADEQUATE TO CAUSE THE PARTICLES TO LEAVE THE SAME, SAID POTENTIAL DIFFERENCE BEING SELECTED TO BE TOO LOW TO ESTABLISH FORCES UPON THE TONER PARTICLES ON RECESSED AREAS OF THE PLATE ADEQUATE TO CAUSE THE LATTER TONER PARTICLES TO LEAVE THE RECESSED AREAS.
References Cited (Backward Citations)
US1941148A
Cited
US2725304A
Cited
US2824813A
Cited
US2910351A
Cited
GB820763A
Cited
US3120806A
Cited
US3160091A
Cited
US2972304A
Cited
US3121009A
Cited
US3091176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |