US4912005A
Expired / Lapsed
US
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Toner and developer compositions with conductive carrier components
Assignee: Xerox Corp
•
Filing: 1989-01-26
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Granted: 1990-03-27
•
Expires: 2009-01-26
Abstract
Abstract A carrier composition with a conductivity of from about 10 4 to about 10 10 (ohm-cm) -1 , and comprised of a mixture of a first carrier component and a second carrier component, at least one of said carrier components containing a polymeric coating thereover, and wherein at least one coating contains conductive particles.
Inventors
- 👤 Donald J. Goodman
- 👤 John F. Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:01
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/10; G03G9/113; G03G9/1139; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995; Y10T428/2998
Claims Analysis
Total Claims: 56
Claim 1
Independent Claim
54 words
A carrier composition with a conductivity of from about 10 4 to about 10 10 (ohm-cm) -1 , and comprised of a mixture of a first carrier component and a second carrier component, at least one of said carrier components containing a polymeric coating thereover, and wherein at least one coating contains conductive particles.
Claim 2
Dependent Claim
54 words
A carrier composition with a conductivity of from about 10 4 to about 10 10 (ohm-cm) -1 , and comprised of a mixture of a first carrier component and a second carrier component, at least one of said carrier components containing a polymeric coating thereover, and wherein at least one coating contains conductive particles.
Claim 3
Dependent Claim
79 words
A carrier composition with a conductivity of from about 10 4 to about 10 10 (ohm-cm) -1 , and comprised of a mixture of a first carrier component present in an amount of from about 25 to about 75 percent by weight, and a second carrier component present in an amount of from about 75 to about 25 percent by weight, said components containing a polymeric coating thereover, and wherein at least one of the coatings contains conductive particles.
Claim 4
Dependent Claim
79 words
A carrier composition with a conductivity of from about 10 4 to about 10 10 (ohm-cm) -1 , and comprised of a mixture of a first carrier component present in an amount of from about 25 to about 75 percent by weight, and a second carrier component present in an amount of from about 75 to about 25 percent by weight, said components containing a polymeric coating thereover, and wherein at least one of the coatings contains conductive particles.
Claim 5
Dependent Claim
52 words
A carrier composition in accordance with claim 2 comprised of a mixture of a first steel carrier component present in an amount of from about 25 to about 50 percent by weight, and a second ferrite carrier component present in an amount of from about 75 to about 50 percent by weight.
Claim 6
Dependent Claim
14 words
A carrier composition in accordance with claim 1 wherein the coatings contain conductive particles.
Claim 7
Dependent Claim
14 words
A carrier composition in accordance with claim 2 wherein the coatings contain conductive particles.
Claim 8
Dependent Claim
14 words
A carrier composition in accordance with claim 3 wherein the coatings contain conductive particles.
Claim 9
Dependent Claim
49 words
A carrier composition in accordance with claim 1 comprised of a mixture of a first high conductivity carrier core and a second moderate conductivity carrier core, which first and second carrier cores contain a polymeric coating, or coatings, and wherein at least one of the coatings contains conductive particles.
Claim 10
Dependent Claim
14 words
A carrier composition in accordance with claim 7 wherein the coatings contain conductive particles.
Claim 11
Dependent Claim
15 words
A carrier composition in accordance with claim 7 wherein the conductive particles are carbon black.
Claim 12
Dependent Claim
22 words
A carrier composition in accordance with claim 7 wherein the carrier coating weight is from about 0.2 to about 2.0 weight percent.
Claim 13
Dependent Claim
26 words
A carrier composition in accordance with claim 7 wherein the conductive particles are present in an amount of from about 1 to about 25 weight percent.
Claim 14
Dependent Claim
26 words
A carrier composition in accordance with claim 8 wherein the conductive particles are present in an amount of from about 1 to about 25 weight percent.
Claim 15
Dependent Claim
18 words
A carrier composition in accordance with claim 7 wherein the high conductivity carrier core is comprised of steel.
Claim 16
Dependent Claim
19 words
A carrier composition in accordance with claim 7 wherein the moderate conductivity carrier core is comprised of a ferrite.
Claim 17
Dependent Claim
12 words
A developer composition comprised of the carrier of claim 1, and toner.
Claim 18
Dependent Claim
12 words
A developer composition comprised of the carrier of claim 2, and toner.
Claim 19
Dependent Claim
12 words
A developer composition comprised of the carrier of claim 3, and toner.
Claim 20
Dependent Claim
28 words
A developer composition in accordance with claim 15 wherein the toner contains resin particles selected from the group consisting of polyesters, styrene butadienes, styrene acrylates, and styrene methacrylates.
Claim 21
Dependent Claim
38 words
A developer composition in accordance with claim 18 wherein the polyester results from the condensation reaction of dimethylterephthalate, 1,2-propanediol, 1,3-butanediol, and pentaerythritol; or wherein the polyester results from the condensation reaction of dimethylterephthalate, 1,2-propanediol, diethylene glycol, and pentaerythritol.
Claim 22
Dependent Claim
29 words
A developer composition in accordance with claim 18 wherein the styrene butadiene is a copolymer containing 91 percent by weight of styrene, and 9 percent by weight of butadiene.
Claim 23
Dependent Claim
17 words
A developer composition in accordance with claim 18 wherein there is selected a suspension polymerized styrene butadiene.
Claim 24
Dependent Claim
29 words
A developer composition in accordance with claim 15 wherein the toner contains pigment particles of carbon black, cyan, magenta, yellow, and mixtures thereof; or red, blue, green, or brown.
Claim 25
Dependent Claim
18 words
A developer composition in accordance with claim 15 wherein the toner contains pigment particles are comprised of magnetite.
Claim 26
Dependent Claim
23 words
A developer composition in accordance with claim 15 wherein the toner contains pigment particles comprised of a mixture of carbon black and magnetites.
Claim 27
Dependent Claim
26 words
A developer composition in accordance with claim 15 wherein the toner contains pigment particles selected from the group consisting of magenta, cyan, yellow, and mixtures thereof.
Claim 28
Dependent Claim
16 words
A developer composition in accordance with claim 15 wherein the toner contains a charge enhancing additive.
Claim 29
Dependent Claim
34 words
A developer composition in accordance with claim 26 wherein the charge enhancing additive is selected from the group consisting of distearyl dimethyl ammonium methyl sulfate, cetyl pyridinium halides, and stearyl phenethyl dimethyl ammonium tosylate.
Claim 30
Dependent Claim
38 words
A carrier composition in accordance with claim 1 wherein the coating is selected from the group consisting of a polychlorotrifluoroethylene-co-vinylchloride copolymer, a polyvinylidene fluoropolymer, a terpolymer of styrene, methacrylate, and an organo silane, fluorinated ethylene-propylene copolymers, and polytetrafluoroethylene.
Claim 31
Dependent Claim
23 words
A carrier composition in accordance with claim 1 wherein the conductivity is from about 10 5 to about 10 10 (ohm-cm) -1 .
Claim 32
Dependent Claim
45 words
A method for obtaining images which comprises generating an electrostatic latent image on a photoconductive imaging member, subsequently affecting development of this image with the developer composition of claim 15, thereafter transferring the image to a permanent substrate, and optionally permanently affixing the image thereto.
Claim 33
Dependent Claim
45 words
A method for obtaining images which comprises generating an electrostatic latent image on a photoconductive imaging member, subsequently affecting development of this image with the developer composition of claim 16, thereafter transferring the image to a permanent substrate, and optionally permanently affixing the image thereto.
Claim 34
Dependent Claim
29 words
A developer composition in accordance with claim 16 wherein the toner contains pigment particles of carbon black; cyan, magenta, yellow, and mixtures thereof; or red, blue, green, or brown.
Claim 35
Dependent Claim
17 words
A developer composition in accordance with claim 16 wherein the toner contains pigment particles comprised of magnetite.
Claim 36
Dependent Claim
23 words
A developer composition in accordance with claim 16 wherein the toner contains pigment particles comprised of a mixture of carbon black and magnetites.
Claim 37
Dependent Claim
26 words
A developer composition in accordance with claim 16 wherein the toner contains pigment particles selected from the group consisting of magenta, cyan, yellow, and mixtures thereof.
Claim 38
Dependent Claim
16 words
A developer composition in accordance with claim 16 wherein the toner contains a charge enhancing additive.
Claim 39
Dependent Claim
34 words
A developer composition in accordance with claim 36 wherein the charge enhancing additive is selected from the group consisting of distearyl dimethyl ammonium methyl sulfate, cetyl pyridinium halides, and stearyl phenethyl dimethyl ammonium tosylate.
Claim 40
Dependent Claim
39 words
A carrier composition in accordance with claim 2 wherein the carrier contains coating is selected from the group consisting of polychlorotrifluoroethylene-co-vinylchloride copolymer, a polyvinylidene fluoropolymer, a terpolymer of styrene, methacrylate, and an organo silane, fluorinated ethylene-propylene copolymers, and polytetrafluoroethylene.
Claim 41
Dependent Claim
38 words
A carrier composition in accordance with claim 3 wherein the coating is selected from the group consisting of a polychlorotrifluoroethylene-co-vinylchloride copolymer, a polyvinylidene fluoropolymer, a terpolymer of styrene, methacrylate, and an organo silane, fluorinated ethylene-propylene copolymers, and polytetrafluoroethylene.
Claim 42
Dependent Claim
55 words
A carrier composition with a conductivity of from about 10 4 to about 10 10 (ohm-cm) -1 , and comprised of a mixture of a first carrier core component and a second different carrier core component, said first and second components containing a polymeric coating thereover, and wherein the coatings have present therein conductive particles.
Claim 43
Dependent Claim
55 words
A carrier composition with a conductivity of from about 10 4 to about 10 10 (ohm-cm) -1 , and comprised of a mixture of a first carrier core component and a second different carrier core component, said first and second components containing a polymeric coating thereover, and wherein the coatings have present therein conductive particles.
Claim 44
Dependent Claim
33 words
A carrier composition in accordance with claim 40 wherein the first carrier components is comprised of a high conductivity carrier core and the second carrier is comprised of a moderate conductivity carrier core.
Claim 45
Dependent Claim
23 words
A carrier composition in accordance with claim 41 wherein the high conductivity carrier core is steel and the moderate conductivity carrier is ferrite.
Claim 46
Dependent Claim
17 words
A carrier composition in accordance with claim 42 wherein the ferrite core is a copper zinc ferrite.
Claim 47
Dependent Claim
27 words
A carrier composition in accordance with claim 40 wherein the conductivity of the carrier composition is from about 10 -5 to about 10 10 (ohm-cm) -1 .
Claim 48
Dependent Claim
30 words
A carrier composition in accordance with claim 40 wherein the carrier coating for the first and second carrier core is comprised of a terpolymer of styrene, methacrylate, and an organosilane.
Claim 49
Dependent Claim
22 words
A carrier composition in accordance with claim 40 wherein the carrier coating weight is from about 0.2 to about 2.0 weight percent.
Claim 50
Dependent Claim
15 words
A carrier composition in accordance with claim 40 wherein the conductive particles are carbon black.
Claim 51
Dependent Claim
26 words
A carrier composition in accordance with claim 40 wherein the conductive particles are present in an amount of from about 1 to about 25 weight percent.
Claim 52
Dependent Claim
78 words
A carrier composition with a conductivity of from about 10 4 to about 10 10 (ohm-cm) -1 , and comprised of a mixture of a first carrier component present in an amount of from about 25 to about 75 percent by weight, and a second carrier component present in an amount of from about 75 to about 25 percent by weight, said components containing polymeric coatings thereover, and wherein at least one of the coatings contains conductive particles.
Claim 53
Dependent Claim
78 words
A carrier composition with a conductivity of from about 10 4 to about 10 10 (ohm-cm) -1 , and comprised of a mixture of a first carrier component present in an amount of from about 25 to about 75 percent by weight, and a second carrier component present in an amount of from about 75 to about 25 percent by weight, said components containing polymeric coatings thereover, and wherein at least one of the coatings contains conductive particles.
Claim 54
Dependent Claim
24 words
A carrier composition in accordance with claim 49 wherein the first component is comprised of steel and the component is comprised of a ferrite.
Claim 55
Dependent Claim
55 words
A carrier composition with a conductivity of from about 10 4 to about 10 10 (ohm-cm) -1 , and comprised of a mixture of a first high conductivity carrier core and a second moderate conductivity carrier core, which carrier cores contain polymeric coatings thereover, and wherein at least one of the coatings contains conductive particles.
Claim 56
Dependent Claim
55 words
A carrier composition with a conductivity of from about 10 4 to about 10 10 (ohm-cm) -1 , and comprised of a mixture of a first high conductivity carrier core and a second moderate conductivity carrier core, which carrier cores contain polymeric coatings thereover, and wherein at least one of the coatings contains conductive particles.
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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) | 1993-03-26 | 1993-09-25 | 1994-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-26 | 1997-09-25 | 1998-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-26 | 2001-09-25 | 2002-03-27 | $7700.00 | Window Closed / Lapsed |