US3856519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer of tower using a volatile insulating liquid
Assignee: Xerox Corp
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Filing: 1971-01-29
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Granted: 1974-12-24
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Expires: 1991-01-29
Abstract
Abstract Dry, final copies are obtained in an electrostatographic imaging system employing liquid development wherein after development with the liquid developer, the imaging surface is contacted with a transfer surface which has previously been supplied with a highly volatile insulating liquid and the toner image on the imaging surface is electrostatically transferred to the transfer sheet. Following separation of the transfer sheet from the imaging surface, the highly volatile insulating liquid available on the transferred sheet is readily removed to provide a dry, final print.
Inventors
- 👤 S Honjo
- 👤 M Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:17
CPC Classifications
G; G03; G03G; G03G7/00; G03G13/00; G03G13/14; G03G13/16; G03G9/00; G03G9/08; G03G9/12; G03G9/125
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
121 words
AN IMAGING METHOD COMPRISING THE STEPS OF FORMING AN ELECTROSTATIC CHARGE PATTERN ON AN ELECTROSTATOGRAPHIC IMAGING SURFACE, DEVELOPING THE ELECTROSTATIC LATENT IMAGE WITH A LIQUID DEVELOPER COMPRISING A HIGH BOILING POINT INSULATING LIQUID HAVING ELECTROSCOPIC MAKING PARTICLES DSPERSED THEREIN, CONTACTING SAID IMAGING SURFACE WITH SAID LIQUID DEVELOPER THEREON WITH A TRANSFER SHEET HAVING SUBSTANTIALLY UNIFORMLY AVAILIBLE AT THE CONTACTING SURFACE A VOLATILE INSULATING LIQUID HAVING A LOWER BOILING POINT AND A GREATER EVAPORATION RATE THAN SIDE HIGH BOILING POINT LIQUID, AND HAVING AN EVAPORATION RATE GREATER THAN ABOUT TWO TIMES THAT OF N-BUTYL ACETATE, TRANSFERRING SAID PARTICLES FROM SAID IMAGING SURFACE TO SAID TRANSFER SHEET WHILE SAID TRANSFER SHEET AND SAID IMAGING SURFACE ARE IN CONTACT, AND DRYING SAID TRANSFER SHEET.
Claim 2
Dependent Claim
121 words
AN IMAGING METHOD COMPRISING THE STEPS OF FORMING AN ELECTROSTATIC CHARGE PATTERN ON AN ELECTROSTATOGRAPHIC IMAGING SURFACE, DEVELOPING THE ELECTROSTATIC LATENT IMAGE WITH A LIQUID DEVELOPER COMPRISING A HIGH BOILING POINT INSULATING LIQUID HAVING ELECTROSCOPIC MAKING PARTICLES DSPERSED THEREIN, CONTACTING SAID IMAGING SURFACE WITH SAID LIQUID DEVELOPER THEREON WITH A TRANSFER SHEET HAVING SUBSTANTIALLY UNIFORMLY AVAILIBLE AT THE CONTACTING SURFACE A VOLATILE INSULATING LIQUID HAVING A LOWER BOILING POINT AND A GREATER EVAPORATION RATE THAN SIDE HIGH BOILING POINT LIQUID, AND HAVING AN EVAPORATION RATE GREATER THAN ABOUT TWO TIMES THAT OF N-BUTYL ACETATE, TRANSFERRING SAID PARTICLES FROM SAID IMAGING SURFACE TO SAID TRANSFER SHEET WHILE SAID TRANSFER SHEET AND SAID IMAGING SURFACE ARE IN CONTACT, AND DRYING SAID TRANSFER SHEET.
Claim 3
Dependent Claim
17 words
The method of claim 1 wherein said transfer sheet is uniformly impregnated with said volatile transfer liquid.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein said electrostatographic imaging surface comprises a photoconductive insulating layer.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein said particles are electrostatically transferred to said transfer sheet by charging said transfer sheet by corona discharge.
Claim 6
Independent Claim
101 words
The method of transferring from an electrostatographic imaging surface to a transfer sheet a developed toner image formed from a liquid developer comprising a high boiling insulating liquid and charged toner particles, said method comprising contacting said transfer sheet with a low boiling highly volatile insulating liquid having a lower boiling point and a greater evaporation rate than said high boiling liquid and having an evaporation rate greater than about two times that of n-butyl acetate, placing said transfer sheet in contact with said imaging surface while said toner image remains wet and electrostatically transferring said toner to said transfer sheet.
Claim 7
Independent Claim
101 words
The method of transferring from an electrostatographic imaging surface to a transfer sheet a developed toner image formed from a liquid developer comprising a high boiling insulating liquid and charged toner particles, said method comprising contacting said transfer sheet with a low boiling highly volatile insulating liquid having a lower boiling point and a greater evaporation rate than said high boiling liquid and having an evaporation rate greater than about two times that of n-butyl acetate, placing said transfer sheet in contact with said imaging surface while said toner image remains wet and electrostatically transferring said toner to said transfer sheet.
Claim 8
Dependent Claim
20 words
The method of claim 5 wherein said low boiling volatile insulating liquid is miscible with said high boiling insulating liquid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |