US4147540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color electrophotographic developer system employing one carrier having a coating of resin and copper tetra-4-(octadecylsulfonomido)phthalocyanine
Assignee: Xerox Corp
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Filing: 1977-08-01
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Granted: 1979-04-03
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Expires: 1997-08-01
Abstract
Abstract A color electrophotographic process is provided which employs magenta, cyan and yellow toners, each in combination with a carrier coated with a resin containing copper tetra-4-(octadecylsulfonomido) phthalocyanine. Thus, for the first time a developer package is provided which is capable of producing prints of sharp quality employing a common carrier. The various magenta, cyan and yellow toners employed in connection with the newly provided coated carrier are also disclosed.
Inventors
- 👤 Joseph Mammino
- 👤 Franklin Jossel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:57
CPC Classifications
C; C09; C09B; C09B57/00; C09B57/10; G; G03; G03G; G03G13/00; G03G13/01; G03G13/013; G03G13/0133; G03G9/00; G03G9/08; G03G9/09; G03G9/0906; G03G9/0908; G03G9/091; G03G9/0916; G03G9/0918; G03G9/10; G03G9/113; G03G9/1138
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
251 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 tetra-4-(octadecylsulfonomido) phthalocyanine cyan toner and a coated steel carrier, said coating comprising a resin and copper tetra-4-(octadecylsulfonomido) phthalocyanine colorant, 2,9-dimethyl-quinacridone magenta toner and said coated steel carrier, and yellow toner the colorant having the formula ##STR2## and said 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 copper tetra-4-(octadecylsulfonomido) phthalocyanine cyan toner and said coated steel carrier, 2,9-dimethyl-quinacridone magenta toner and said coated steel carrier, and said yellow toner and said coated steel carrier; charging said photoconductive member for a third time, exposing 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 tetra-4-octadecylsulfonomido) phthalocyanine cyan toner and said coated steel carrier, 2,9-dimethyl-quinacridone magenta toner and said coated steel carrier, and said yellow toner with said coated steel carrier.
Claim 2
Dependent Claim
251 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 tetra-4-(octadecylsulfonomido) phthalocyanine cyan toner and a coated steel carrier, said coating comprising a resin and copper tetra-4-(octadecylsulfonomido) phthalocyanine colorant, 2,9-dimethyl-quinacridone magenta toner and said coated steel carrier, and yellow toner the colorant having the formula ##STR2## and said 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 copper tetra-4-(octadecylsulfonomido) phthalocyanine cyan toner and said coated steel carrier, 2,9-dimethyl-quinacridone magenta toner and said coated steel carrier, and said yellow toner and said coated steel carrier; charging said photoconductive member for a third time, exposing 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 tetra-4-octadecylsulfonomido) phthalocyanine cyan toner and said coated steel carrier, 2,9-dimethyl-quinacridone magenta toner and said coated steel carrier, and said yellow toner with said 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 3 wherein the order of said magenta and yellow toner application is reversed.
Claim 7
Dependent Claim
20 words
The process as defined in claim 4 wherein the order to application of the yellow and cyan toners is reversed.
Claim 8
Dependent Claim
20 words
The process as defined in claim 5 wherein the order of application of the cyan and magenta toner is reversed.
Claim 9
Dependent Claim
19 words
The process of claim 1 wherein each of said cyan magenta and yellow toners comprise styrene-n-butylmethacrylate resin and colorant.
Claim 10
Dependent Claim
16 words
The process of claim 8 wherein said resin on said carrier is a styrene-methyl methacrylate-vinyltriethoxy-silane terpolymer.
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) | 1982-04-02 | 1982-10-02 | 1983-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-02 | 1986-10-02 | 1987-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-02 | 1990-10-02 | 1991-04-03 | $7700.00 | Window Closed / Lapsed |