US4822710A
Expired / Lapsed
US
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Liquid developer compositions
Assignee: Xerox Corp
•
Filing: 1987-02-20
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Granted: 1989-04-18
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Expires: 2007-02-20
Abstract
Abstract Disclosed is an improved liquid developer composition comprised of an oil base comprised of Magiesol, pigment particles, a dispersant, and a thickener component.
Inventors
- 👤 Melvin D. Croucher
- 👤 James M. Duff
- 👤 John R. C. Fuler
- 👤 George R. Pravato
- 👤 Raymond W. Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:03
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/125; G03G9/13; G03G9/131
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
28 words
An improved liquid developer composition comprised of a Magiesol oil base, pigment particles, a dispersant, and a thickener component selected from the group consisting of polyisobutylene and poly(isobutyl-co-isoprene)copolymer.
Claim 2
Dependent Claim
28 words
An improved liquid developer composition comprised of a Magiesol oil base, pigment particles, a dispersant, and a thickener component selected from the group consisting of polyisobutylene and poly(isobutyl-co-isoprene)copolymer.
Claim 3
Dependent Claim
16 words
An improved developer composition in accordance with claim 1 wherein the oil base is Magiesol 60.
Claim 4
Dependent Claim
16 words
An improved developer composition in accordance with claim 1 wherein the dispersant is a polyisobutylene succinimide.
Claim 5
Dependent Claim
14 words
A composition in accordance with claim 1 wherein the pigment particles are carbon black.
Claim 6
Dependent Claim
30 words
A composition in accordance with claim 1 wherein the pigment particles are selected from the group consisting of cyan pigment particles, magenta pigment particles, yellow pigment particles; and mixtures thereof.
Claim 7
Dependent Claim
23 words
An improved liquid developer composition comprising a Magiesol oil base, pigment particles, a dispersant, and a thickener component, wherein the thickener is polyisobutylene.
Claim 8
Dependent Claim
23 words
An improved liquid developer composition comprising a Magiesol oil base, pigment particles, a dispersant, and a thickener component, wherein the thickener is polyisobutylene.
Claim 9
Dependent Claim
23 words
An improved liquid developer composition comprising a Magiesol oil base, pigment particles, a dispersant, and a thickener component, wherein the thickener is poly(isobutyl-co-isoprene)copolymer.
Claim 10
Dependent Claim
23 words
An improved liquid developer composition comprising a Magiesol oil base, pigment particles, a dispersant, and a thickener component, wherein the thickener is poly(isobutyl-co-isoprene)copolymer.
Claim 11
Dependent Claim
81 words
A composition in accordance with claim 1 wherein the Magiesol is present in an amount of from about 50 percent by weight to about 90 percent by weight, the pigment particles are present in an amount of from about 4 to about 20 percent by weight, the dispersant is present in an amount of from about 2 to about 15 percent by weight, and the thickener is present in an amount of from about 4 to about 35 percent by weight.
Claim 12
Dependent Claim
22 words
A composition in accordance with claim 1 wherein the thickener component selected has an average molecular weight of less than about 75,000.
Claim 13
Dependent Claim
21 words
A composition in accordance with claim 1 wherein the thickener is of a molecular weight of from about 5,000 to 40,000.
Claim 14
Dependent Claim
24 words
A composition in accordance with claim 1 wherein the drying time of the resulting developer is from about 5 seconds to about 25 seconds.
Claim 15
Dependent Claim
22 words
A composition in accordance with claim 1 wherein the viscosity of the developer composition is from about 150 to about 350 centipoises.
Claim 16
Dependent Claim
14 words
A composition in accordance with claim 1 further including therein an inorganic additive component.
Claim 17
Dependent Claim
43 words
A method of accomplishing the development of electrostatic latent images which comprises the formation of the aforementioned image on an imaging member, subsequently developing this image with the developer composition of claim 1, and thereafter transferring the developed image to a suitable substrate.
Claim 18
Dependent Claim
19 words
A method of imaging in accordance with claim 14 wherein the oil base for the developer is Magiesol 60.
Claim 19
Dependent Claim
16 words
A method of imaging in accordance with claim 14 wherein the dispersant is a polyisobutylene succinimide.
Claim 20
Dependent Claim
16 words
A method of imaging in accordance with claim 14 wherein the pigmment particles are carbon black.
Claim 21
Dependent Claim
32 words
A method of imaging in accordance with claim 14 wherein the pigment particles are selected from the group consisting of cyan pigment particles, magenta pigment particles, yellow pigment particles; and mixtures thereof.
Claim 22
Independent Claim
56 words
A method of developing electrostatic latent images which comprises the formation of the aforementioned image on an imaging member, subsequently developing this image with a liquid developer composition comprising a Magiesol oil base, pigment particles, a dispersant, and a thickener component, and thereafter transferring the developed image to a suitable substrate, wherein the thickener is polypolyisobutylene.
Claim 23
Independent Claim
56 words
A method of developing electrostatic latent images which comprises the formation of the aforementioned image on an imaging member, subsequently developing this image with a liquid developer composition comprising a Magiesol oil base, pigment particles, a dispersant, and a thickener component, and thereafter transferring the developed image to a suitable substrate, wherein the thickener is polypolyisobutylene.
Claim 24
Independent Claim
57 words
A method of developing electrostatic latent images which comprises the formation of the aforementioned image on an imaging member, subsequently developing this image with a liquid developer composition comprising a Magiesol oil base, pigment particles, a dispersant, and a thickener component, and thereafter transferring the developed image to a suitable substrate, wherein the thickener is poly(isobutyl-co-isoprene) copolymer.
Claim 25
Independent Claim
57 words
A method of developing electrostatic latent images which comprises the formation of the aforementioned image on an imaging member, subsequently developing this image with a liquid developer composition comprising a Magiesol oil base, pigment particles, a dispersant, and a thickener component, and thereafter transferring the developed image to a suitable substrate, wherein the thickener is poly(isobutyl-co-isoprene) copolymer.
Claim 26
Dependent Claim
83 words
A method of imaging in accordance with claim 14 wherein the Magiesol is present in an amount of from about 50 percent by weight to about 90 percent by weight, the pigment particles are present in an amount of from about 4 to about 20 percent by weight, the dispersant is present in an amount of from about 2 to about 15 percent by weight, and the thickener is present in an amount of from about 4 to about 35 percent by weight.
Claim 27
Dependent Claim
24 words
A method of imaging in accordance with claim 14 wherein the thickener component selected has an average molecular weight of less than about 75,000.
Claim 28
Dependent Claim
24 words
A method of imaging in accordance with claim 14 wherein the thickener is of a molecular weight of between about 5,000 and about 40,000.
Claim 29
Dependent Claim
26 words
A method of imaging in accordance with claim 14 wherein the drying time of the resulting developer is from about 5 seconds to about 25 seconds.
Claim 30
Dependent Claim
24 words
A method of imaging in accordance with claim 14 wherein the viscosity of the developer composition is from about 150 to about 350 centipoises.
Claim 31
Dependent Claim
19 words
A method of imaging in accordance with claim 14 wherein the developer further includes therein an inorganic additive component.
Claim 32
Dependent Claim
39 words
A method of imaging in accordance with claim 14 wherein the developer is comprised of an oil base selected from the group consisting of Magiesol and Isopar, pigment particles, a dispersant of polyisobutylene succinimide, and an inorganic additive filler.
Claim 33
Dependent Claim
17 words
A method of imaging in accordance with claim 14 wherein there results images that are substantially smudgeproof.
Claim 34
Dependent Claim
29 words
A composition in accordance with claim 1 wherein the pigment particles are carbon black selected from the group consisting of Printex 140V, Printex 150, Printex A, and Printex 45.
Claim 35
Dependent Claim
24 words
A composition in accordance with claim 1 wherein the pigments are selected from the group consisting of Lithol Scarlett, Hostaperm Pink, anthraquinones, and quinacridones.
Claim 36
Dependent Claim
26 words
A composition in accordance with claim 1 wherein the pigments are selected from the group consisting of Sudan Blue, Permanent Yellow, carbon black, and mixtures thereof.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |