US4057426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magenta toner with a coated carrier
Assignee: Xerox Corp
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Filing: 1975-09-29
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Granted: 1977-11-08
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Expires: 1995-09-29
Abstract
Abstract A novel magenta developer system is provided which employs a 2,9-dimethylquinacridone pigment and a resin toner in combination with a carrier coated with resin containing copper tetra-4-(octadecylsulfonomido) phthalocyanine. Thus, a magenta developer is provided for the first time which is capable of employing a coated conventional carrier, thereby simplifying the color electrophotographic process. Color electrophotographic process employing this developer are also disclosed.
Inventors
- 👤 Joseph Mammino
- 👤 Franklin Jossel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:23
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/09; G03G9/0906; G03G9/092; G03G5/00; G03G5/12; G03G9/10; G03G9/113; G03G9/1138
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
44 words
An electrostatographic developer for developing electrostatic latent images comprising toner particles and coated carrier particles, said toner comprising a resin material and a 2,9-dimethyl-quinacridone colorant, said coated carrier comprising carrier material particles overcoated with a composition comprising a resin and copper tetra-4-(octadecylsulfonomido) phthalocyanine colorant.
Claim 2
Dependent Claim
44 words
An electrostatographic developer for developing electrostatic latent images comprising toner particles and coated carrier particles, said toner comprising a resin material and a 2,9-dimethyl-quinacridone colorant, said coated carrier comprising carrier material particles overcoated with a composition comprising a resin and copper tetra-4-(octadecylsulfonomido) phthalocyanine colorant.
Claim 3
Dependent Claim
29 words
The material as defined in claim 1 wherein said toner resin is a member selected from the group consisting of styrenebutylmethacrylate copolymers, styrene-vinyltoluene copolymers, styrene-acrylate copolymers, and polystyrene resins.
Claim 4
Dependent Claim
15 words
The material as defined in claim 1 wherein said toner resin is a styrene-n-butylmethacrylate copolymer.
Claim 5
Dependent Claim
26 words
The developer of claim 1 wherein said carrier coating resin is selected from the group consisting of styrenemaleic anhydrides, novalac type phenolics and polymeric organo silicones.
Claim 6
Dependent Claim
19 words
The developer of claim 1 wherein said carrier coating resin is a polymer of styrene, methyl methacrylate and vinyltriethoxy-silane.
Claim 7
Dependent Claim
23 words
The developer of claim 1 wherein said phthalocyanine colorant is present in about 0.25 to about 5 weight percent of said carrier coating.
Claim 8
Dependent Claim
15 words
The developer of claim 5 wherein the core of said coated carrier particles is steel.
Claim 9
Dependent Claim
63 words
An electrostatographic imaging process comprising establishing an electrostatic latent image on a surface and contacting said surface with an electrostatographic developer comprising toner particles and coated carrier particles, said toner particles comprising a resin and a 2,9-dimethylquinacridone colorant and said coated carrier comprises carrier material particles overcoated with a composition containing a resin a copper tetra-4-(octadecylsulfonomido) phthalocyanine colorant to develope said latent image.
Claim 10
Dependent Claim
63 words
An electrostatographic imaging process comprising establishing an electrostatic latent image on a surface and contacting said surface with an electrostatographic developer comprising toner particles and coated carrier particles, said toner particles comprising a resin and a 2,9-dimethylquinacridone colorant and said coated carrier comprises carrier material particles overcoated with a composition containing a resin a copper tetra-4-(octadecylsulfonomido) phthalocyanine colorant to develope said latent image.
Claim 11
Dependent Claim
12 words
The imaging process of claim 8 wherein said carrier particle is steel.
Claim 12
Dependent Claim
27 words
The imaging process of claim 8 wherein said carrier coating resin is selected from the group consisting of styrene-maleic anhydrides, novalac type phenolics and polymeric organo silicones.
Claim 13
Dependent Claim
20 words
The imaging process of claim 8 wherein said carrier coating resin is a polymer of styrene, methyl methacrylate and vinyltriethoxy-silane.
Claim 14
Dependent Claim
24 words
The imaging process of claim 8 wherein said phthalocyanine colorant is present in about 0.25 to about 5 weight percent of said carrier coating.
Claim 15
Dependent Claim
14 words
The imaging process of claim 8 wherein said toner resin is a styrene-n-butylethacrylate copolymer.
Claim 16
Dependent Claim
29 words
The imaging process as defined in claim 8 further including the steps of transferring said developed image to a receiving surface and fixing said image on said receiving surface.
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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) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |