US3909259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color electrophotographic imaging process utilizing specific carrier-toner combinations
Assignee: Xerox Corp
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Filing: 1973-12-17
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Granted: 1975-09-30
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Expires: 1993-12-17
Abstract
Abstract A color electrophotographic imaging process is disclosed employing uniquely distinct developer materials. Specific cyan, yellow, and magenta developers which uniquely cooperate to form true color images in an electrophotographic process are described. The electrophotographic processes employing these developers are also disclosed.
Inventors
- 👤 Joseph Mammino
- 👤 Franklin Jossel
- 👤 James M Kobey
- 👤 John P Serio
- 👤 Warren E Solodar
- 👤 Alan H Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:55
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/09; G03G9/0906; G03G9/0918; G03G5/00; G03G5/12; G03G9/0908; G03G9/091; G03G9/0922; G03G9/10; G03G9/107; G03G9/1075
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
344 words
A COLOR ELECTROPHOTOGRAPHIC IMAGING PROCESS COMPRISING CHARGING A PHOTOCONDUCTIVE MEMBER, EXPOSING SAID PHOTOCONDUCTIVE MEMBER TO AN ORIGINAL TO BE REPRODUCED THROUGH A FILTER OF ONE COLOR THEREBY SELECTIVELY DISCHARGING SAID PHOTOCONDUCTIVE MEMBER, DEVELOPING THE ELECTROSTATIC IMAGE FORMED THEREBY WITH A DEVELOPER OF A COMPLEMENTARY COLOR, SAID DEVELOPER BEING ONE MEMBER OF THE GROUP CONSISTING OF COPPER PHTHALOCYANINE PIGMENT IDENTIFIED IN THE COLOUR INDEX AS C174160, C1 PIGMENT BLUE 15, CYAN TONER AND A METHYL TERPOLYMER COATED STEEL CARRIER, ANTHRAQUINONE DYE IDENTIFIED IN THE COLOUR INDEX AS C160710, C1 DISPERSE RED 15, MAGENTA TONER AND A NICKEL BERRY CARRIER, AND MONOAZO DYE IDENTIFIED IN THE COLOUR INDEX AS C112700, C1 SOLVENT YELLOW 16, YELLOW TONER AND A METHYL TERPOLYMER COATED STEEL CARRIER, CHARGING SAID PHOTOCONDUCTOR FOR A SECOND TIME AND SELECTIVELY EXPOSING SAID PHOTOCONDUCTOR TO THE SAME IMAGE THROUGH A FILTER OF ANOTHER PRIMARY COLOR, DEVELOPING THE LATENT ELECTROSTATIC IMAGE FORMED THEREBY WITH A DEVELOPER OF A COMPLEMENTARY COLOR, SAID DEVELOPER BEING ANOTHER MEMBER SELECTED FROM THE GROUP CONSISTING OF COPER PTHALOCYANINE PIGMENT IDENTIFIED IN THE COLOUR INDEX AS C174160, C1 PIGMENT BLUE 15, CYAN TONER AND A METHYL TERPOLYMER COATED STEEL CARRIER, ANTHRAQUINONE DYE IDENTIFIED IN THE COLOUR INDEX AS C160710, C1 DISPERSE RED15, MAGENTA TONER AND A NICKEL BERRY CARRIER, AND MONOAZO DYE IDENTIFIED IN THE COLOUR INDEX AS C112700, C1 SOLVENT YELLOW 16, YELLOW TONER AND A METHYL TERPOLYMER COATED STEEL CARRIER, CHARGING SAID PHOTOCONDUCTIVE MEMBER FOR A THIRD TIME, EXPOSING SAID PHOTOCONDUCTOR TO THE SAME IMAGE THROUGH A FILTER OF THE REMAINING PRIMARY COLOR AND DEVELOPING THE LATENT ELECTROSTATIC IMAGE WITH A COMPLEMENTARY DEVELOPER, SAID DEVELOPER BEING THE REMAINING DEVELOPER OF THE GROUP CONSISTING OF COPPER PHTHALOCYANINE PIGMENT IDENTIFIED IN THE COLOUR INDEX AS C174160, C1 PIGMENT BLUE 15, CYAN TONER AND A METHYL TERPOLYMER COATED STEEL CARRIER, ANTHRAQUINONE DYE IDENTIFIED IN THE COLOUR INDEX AS C160710, C1 DISPERSE RED 158 MAGENTA TONER AND A NICKEL BERRY CARRIER, AND MONOAZO DYE IDENTIFIED IN THE COLOUR INDEX AS C112700, C1 SOLVENT YELLOW 16, YELLOW TONER AND A METHYL TERPOLYMER COATED STEEL CARRIER.
Claim 2
Dependent Claim
344 words
A COLOR ELECTROPHOTOGRAPHIC IMAGING PROCESS COMPRISING CHARGING A PHOTOCONDUCTIVE MEMBER, EXPOSING SAID PHOTOCONDUCTIVE MEMBER TO AN ORIGINAL TO BE REPRODUCED THROUGH A FILTER OF ONE COLOR THEREBY SELECTIVELY DISCHARGING SAID PHOTOCONDUCTIVE MEMBER, DEVELOPING THE ELECTROSTATIC IMAGE FORMED THEREBY WITH A DEVELOPER OF A COMPLEMENTARY COLOR, SAID DEVELOPER BEING ONE MEMBER OF THE GROUP CONSISTING OF COPPER PHTHALOCYANINE PIGMENT IDENTIFIED IN THE COLOUR INDEX AS C174160, C1 PIGMENT BLUE 15, CYAN TONER AND A METHYL TERPOLYMER COATED STEEL CARRIER, ANTHRAQUINONE DYE IDENTIFIED IN THE COLOUR INDEX AS C160710, C1 DISPERSE RED 15, MAGENTA TONER AND A NICKEL BERRY CARRIER, AND MONOAZO DYE IDENTIFIED IN THE COLOUR INDEX AS C112700, C1 SOLVENT YELLOW 16, YELLOW TONER AND A METHYL TERPOLYMER COATED STEEL CARRIER, CHARGING SAID PHOTOCONDUCTOR FOR A SECOND TIME AND SELECTIVELY EXPOSING SAID PHOTOCONDUCTOR TO THE SAME IMAGE THROUGH A FILTER OF ANOTHER PRIMARY COLOR, DEVELOPING THE LATENT ELECTROSTATIC IMAGE FORMED THEREBY WITH A DEVELOPER OF A COMPLEMENTARY COLOR, SAID DEVELOPER BEING ANOTHER MEMBER SELECTED FROM THE GROUP CONSISTING OF COPER PTHALOCYANINE PIGMENT IDENTIFIED IN THE COLOUR INDEX AS C174160, C1 PIGMENT BLUE 15, CYAN TONER AND A METHYL TERPOLYMER COATED STEEL CARRIER, ANTHRAQUINONE DYE IDENTIFIED IN THE COLOUR INDEX AS C160710, C1 DISPERSE RED15, MAGENTA TONER AND A NICKEL BERRY CARRIER, AND MONOAZO DYE IDENTIFIED IN THE COLOUR INDEX AS C112700, C1 SOLVENT YELLOW 16, YELLOW TONER AND A METHYL TERPOLYMER COATED STEEL CARRIER, CHARGING SAID PHOTOCONDUCTIVE MEMBER FOR A THIRD TIME, EXPOSING SAID PHOTOCONDUCTOR TO THE SAME IMAGE THROUGH A FILTER OF THE REMAINING PRIMARY COLOR AND DEVELOPING THE LATENT ELECTROSTATIC IMAGE WITH A COMPLEMENTARY DEVELOPER, SAID DEVELOPER BEING THE REMAINING DEVELOPER OF THE GROUP CONSISTING OF COPPER PHTHALOCYANINE PIGMENT IDENTIFIED IN THE COLOUR INDEX AS C174160, C1 PIGMENT BLUE 15, CYAN TONER AND A METHYL TERPOLYMER COATED STEEL CARRIER, ANTHRAQUINONE DYE IDENTIFIED IN THE COLOUR INDEX AS C160710, C1 DISPERSE RED 158 MAGENTA TONER AND A NICKEL BERRY CARRIER, AND MONOAZO DYE IDENTIFIED IN THE COLOUR INDEX AS C112700, C1 SOLVENT YELLOW 16, YELLOW TONER AND A METHYL TERPOLYMER COATED STEEL CARRIER.
Claim 3
Dependent Claim
27 words
The process as defined in claim 1 wherein said cyan toner is applied first, said magenta toner is applied second, and said yellow toner is applied third.
Claim 4
Dependent Claim
27 words
The process as defined in claim 1 wherein said magenta toner is applied first, said yellow toner is applied second, and said cyan toner is applied third.
Claim 5
Dependent Claim
27 words
The process as defined in claim 1 wherein said yellow toner is appliEd first, said cyan toner is applied second, and said magenta toner is applied third.
Claim 6
Dependent Claim
19 words
The process as defined in claim 2 wherein the order of said magenta and yellow toner application is reversed.
Claim 7
Dependent Claim
20 words
The process as defined in claim 3 wherein the order of application of the yellow and cyan toners is reversed.
Claim 8
Dependent Claim
20 words
The process as defined in claim 4 wherein the order of application of the cyan and magenta toners is reversed.
Claim 9
Dependent Claim
60 words
The process as defined in claim 1 wherein said cyan toner comprises indanthrene blue identified in the Colour Index as CI69810, Special Blue X-2137; said magenta toner comprises disazo dye identified in the Colour Index as CI26050, CI Solvent Red 19; and said yellow toner comprises nitrophenylaminesulfonamide identified in the Colour Index as Foron Yellow SE-GLF, CI Disperse Yellow 33.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |