US4560635A
Expired / Lapsed
US
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Toner compositions with ammonium sulfate charge enhancing additives
Assignee: Xerox Corp
•
Filing: 1984-08-30
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Granted: 1985-12-24
•
Expires: 2004-08-30
Abstract
Abstract Disclosed in the present application are toner compositions comprised of resin particles, pigment particles, and a sulfate charge enhancing additive selected from the group consisting of distearyl dimethyl ammonium methyl sulfate, and behenyl trimethyl ammonium methyl sulfate.
Inventors
- 👤 Thomas R. Hoffend
- 👤 Angelo J. Barbetta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:47
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/097; G03G9/09733; G03G9/09741
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
35 words
An improved positively charged toner composition comprised of resin particles, pigment particles, and a sulfate charge enhancing additive selected from the group consisting of distearyl dimethyl ammonium methyl sulfate, and behenyl trimethyl ammonium methyl sulfate.
Claim 2
Dependent Claim
35 words
An improved positively charged toner composition comprised of resin particles, pigment particles, and a sulfate charge enhancing additive selected from the group consisting of distearyl dimethyl ammonium methyl sulfate, and behenyl trimethyl ammonium methyl sulfate.
Claim 3
Dependent Claim
30 words
A composition in accordance with claim 1 wherein the charge enhancing additive is present in an amount of from about 0.1 percent by weight to about 10 percent by weight.
Claim 4
Dependent Claim
24 words
A composition in accordance with claim 1 wherein the resin particles are selected from the group consisting of polyesters, styrene based polymers, and polycarbonates.
Claim 5
Dependent Claim
18 words
A composition in accordance with claim 3 wherein the styrene based polymers are styrene/n-butylmethacrylates, styrene/n-butylacrylates, or styrene butadiene.
Claim 6
Dependent Claim
29 words
A composition in accordance with claim 1 wherein the pigment particles are present in an amount of from about 2 percent by weight to about 20 percent by weight.
Claim 7
Dependent Claim
32 words
A composition in accordance with claim 1 wherein the pigment particles are comprised of magnetites present in an amount of from about 10 percent by weight to about 60 percent by weight.
Claim 8
Dependent Claim
17 words
An improved developer composition comprised of the positively charged toner composition of claim 1, and carrier particles.
Claim 9
Dependent Claim
21 words
A developer composition in accordance with claim 7 wherein the carrier particles are comprised of steel coated with a polymeric resin.
Claim 10
Dependent Claim
19 words
A developer composition in accordance with claim 7 wherein the charge enhancing additive is distearyl dimethyl ammonium methyl sulfate.
Claim 11
Dependent Claim
19 words
A developer composition in accordance with claim 7 wherein the charge enhancing additive is behenyl trimethyl ammonium methyl sulfate.
Claim 12
Dependent Claim
20 words
A developer composition in accordance with claim 7 wherein the charge enhancing additive is distearyl methyl ethyl ammonium ethyl sulfate.
Claim 13
Dependent Claim
28 words
A developer composition in accordance with claim 7 wherein the resin particles are selected from the group consisting of polyesters, styrene/n-butylmethacrylate copolymers, styrene/n-butylacrylate copolymers, and styrene butadiene copolymers.
Claim 14
Dependent Claim
45 words
A method of imaging which comprises forming a negative electrostatic latent image on a photoresponsive imaging member, contacting the resulting image with the toner composition of claim 1, followed by subsequently transferring the developed image to a suitable substrate, and permanently affixing the image thereto.
Claim 15
Dependent Claim
26 words
A method of imaging in accordance with claim 13 wherein fixing is accomplished with a fuser roll containing lead oxide and a vinylidene fluoride hexafluoropropylene copolymer.
Claim 16
Dependent Claim
26 words
A method of imaging in accordance with claim 13 wherein the photoresponsive member is comprised of a substrate, a photogenerating layer, and a charge transport layer.
Claim 17
Dependent Claim
40 words
A method of imaging in accordance with claim 15 wherein the photogenerating layer is trigonal selenium or vanadyl phthalocyanine, optionally dispersed in a resin binder, and the charge transport layer is comprised of N,N'-diphenyl-N,N'-bis(3-methylphenyl) 1,1'-biphenyl-4,4'-diamine dispersed in a polycarbonate resin.
Claim 18
Dependent Claim
25 words
A method of imaging in accordance with claim 16 wherein the charge enhancing additive is distearyl dimethyl ammonium methylsulfate, or behenyl trimethyl ammonium methyl sulfate.
Claim 19
Dependent Claim
30 words
A method of imaging in accordance with claim 17 the charge enhancing additive is stearyl dimethyl ammonium methylsulfate, behenyl trimethyl ammonium methyl sulfate, or distearyl methyl ethyl ammonium ethyl sulfate.
Claim 20
Dependent Claim
19 words
A composition in accordance with claim 1 wherein the pigment particles are selected from magenta, cyan, and yellow pigments.
Claim 21
Dependent Claim
12 words
A toner composition in accordance with claim 1 generated by extrusion processing.
Claim 22
Dependent Claim
32 words
A toner composition in accordance with claim 1 wherein the pigment particles are carbon black present in an amount of from about 2 percent by weight to about 20 percent by weight.
Claim 23
Dependent Claim
23 words
A toner composition in accordance with claim 1 wherein the pigment particles are comprised of a mixture of carbon black particles and magnetites.
Claim 24
Dependent Claim
46 words
A toner composition in accordance with claim 22 wherein the carbon black particles are present in an amount of from about 2 to about 12 percent by weight, and the magnetite is present in an amount of from about 10 to about 30 percent by weight.
Claim 25
Dependent Claim
37 words
A toner composition in accordance with claim 22 wherein the carbon black is present in an amount of about 4 percent by weight, and the magnetite is present in an amount of about 15 percent by weight.
Claim 26
Dependent Claim
25 words
A method of imaging in accordance with claim 13 wherein fixing is accomplished with a fuser roll containing lead oxide and a vinylidine fluoride/hexafluoropropylene/tetrafluoroethylene terpolymer.
Claim 27
Dependent Claim
21 words
An improved positively charged toner composition consisting essentially of resin particles, pigment particles, and the charge enhancing additive distearyldimethyl ammonium methylsulfate.
Claim 28
Dependent Claim
21 words
An improved positively charged toner composition consisting essentially of resin particles, pigment particles, and the charge enhancing additive distearyldimethyl ammonium methylsulfate.
Claim 29
Dependent Claim
29 words
A toner composition according to claim 26, wherein the charge enhancing additive is present in an amount from about 0.1 percent by weight to about 10 percent by weight.
Claim 30
Dependent Claim
23 words
A toner composition according to claim 26, wherein the resin particles are selected from the group consisting of polyesters, styrene polymers, and polycarbonates.
Claim 31
Dependent Claim
17 words
A toner composition according to claim 28, wherein the styrene polymers are styrene/butylmethacrylates, styrene/butylacrylates, or styrene butadiene.
Claim 32
Dependent Claim
14 words
A toner composition according to claim 26, wherein the pigment particles are carbon black.
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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) | 1988-12-23 | 1989-06-24 | 1989-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-23 | 1993-06-24 | 1993-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-23 | 1997-06-24 | 1997-12-24 | $7700.00 | Window Closed / Lapsed |