Patent US4816370A successfully refreshed from Google Patents.
US4816370A
Expired / Lapsed
US
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Developer compositions with stabilizers to enable flocculation
Assignee: Xerox Corp
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Filing: 1987-08-24
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Granted: 1989-03-28
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Expires: 2007-08-24
Abstract
Abstract A liquid developer composition comprised of an oil base, dyed polymer particles, charge control additives, and stabilizers that enable the flocculation of the composition, which stabilizers possess a solubility temperature equal to or exceeding 40° C.
Inventors
- 👤 Melvin D. Croucher
- 👤 Raymond W. Wong
- 👤 Michael L. Hair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:27
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/135; G03G9/1355
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
51 words
A liquid developer composition comprised of an oil base, dyed polymer particles, charge control additives, and stabilizers that enable the flocculation of the composition, which stabilizers possess a solubility temperature equal to or exceeding 40° C., and wherein said stabilizers are irreversibly physically or chemically attached to said dyed polymer particles.
Claim 2
Dependent Claim
51 words
A liquid developer composition comprised of an oil base, dyed polymer particles, charge control additives, and stabilizers that enable the flocculation of the composition, which stabilizers possess a solubility temperature equal to or exceeding 40° C., and wherein said stabilizers are irreversibly physically or chemically attached to said dyed polymer particles.
Claim 3
Dependent Claim
29 words
An improved developer composition in accordance with claim 1 wherein the oil base is selected from the group consisting of Isopar G, Isopar H, Isopar L, and Isopar M.
Claim 4
Dependent Claim
30 words
A developer composition in accordance with claim 1 wherein the dye for the polymer particles is selected from the group consisting of cyan, magenta, and yellow dyes; and mixtures thereof.
Claim 5
Dependent Claim
27 words
A developer composition in accordance with claim 1 wherein the polymer is selected from the group consisting of poly(N-vinyl-2-pyrrolidone), poly(vinyl acetate), and poly(ethyl acrylate); and copolymers thereof.
Claim 6
Dependent Claim
26 words
A developer composition in accordance with claim 1 wherein the charge control additive is selected from the group consisting of polyisobutylene succinimide, lecithin, and zirconium octoate.
Claim 7
Dependent Claim
16 words
A developer composition in accordance with claim 1 wherein the stabilizer is a poly(ethylene-co-vinyl acetate) copolymer.
Claim 8
Dependent Claim
21 words
A developer composition in accordance with claim 1 with an image transfer efficiency of from 80 percent to about 99 percent.
Claim 9
Dependent Claim
25 words
A developer composition in accordance with claim 1 wherein the average diameter of the ink composition is from about 0.1 micron to about 1 micron.
Claim 10
Dependent Claim
28 words
A developer composition in accordance with claim 1 wherein the oil based vehicle is present in an amount of from about 90 to about 99.5 percent by weight.
Claim 11
Dependent Claim
31 words
A developer composition in accordance with claim 1 wherein the dyed polymer particles are present in an amount of from about 0.5 percent by weight to about 6 percent by weight.
Claim 12
Dependent Claim
92 words
A developer composition in accordance with claim 1 wherein the dye selected for the polymer particles is selected from the group consisting of Orasol Blue GN, Orasol Red 2BL, Orasol Blue BLN, Orasol Black GN, Orasol Black RL, Orasol Yellow 2RLN, Orasol Red 2B, Orasol Blue 2GLN, Orasol Yellow 2GLN, Orasol Red G, Morfast Blue 100, Morfast Red 101, Morfast Red 104, Morfast Yellow 102, Morfast Black 101, Savinyl Yellow RLS, Savinyl Yellow 2RLS, Savinyl Pink 6BLS, Savinyl Red 3BLS, Savinyl Red GL5, Savinyl Black RLS, Neozapon Black X57, and Astrophalozine FF.
Claim 13
Dependent Claim
31 words
A developer composition in accordance with claim 1 wherein the charge control additive is present in an amount of from about 0.01 percent by weight to about 2 percent by weight.
Claim 14
Dependent Claim
39 words
A method of imaging which comprises the formation of an image on an imaging member, subsequently developing this image with the composition of claim 1, thereafter transferring the image to a suitable substrate, and permanently affixing the image thereto.
Claim 15
Dependent Claim
20 words
A method in accordance with claim 13 wherein the image transfer efficiency is from about 80 to about 99 percent.
Claim 16
Dependent Claim
15 words
A method in accordance with claim 13 wherein there is formulated an electrostatic latent image.
Claim 17
Dependent Claim
33 words
A method in accordance with claim 13 wherein there is selected for the developer composition an oil base selected from the group consisting of Isopar G, Isopar H, Isopar L, and Isopar M.
Claim 18
Dependent Claim
26 words
A method in accordance with claim 13 wherein the polymer is selected from the group consisting of poly(N-vinyl-2-pyrrolidone), poly(vinyl acetate), and poly(ethyl acrylate); and copolymers thereof.
Claim 19
Dependent Claim
25 words
A method in accordance with claim 13 wherein the charge control additive is selected from the group consisting of polyisobutylene succinimide, lecithin, and zirconium octoate.
Claim 20
Dependent Claim
15 words
A method in accordance with claim 13 wherein the stabilizer is a poly(ethylene-co-vinyl acetate) copolymer.
Claim 21
Dependent Claim
20 words
A method in accordance with claim 13 with an image transfer efficiency of from 80 percent to about 99 percent.
Claim 22
Dependent Claim
24 words
A method in accordance with claim 13 wherein the average diameter of the ink composition is from about 0.1 micron to about 1 micron.
Claim 23
Dependent Claim
27 words
A method in accordance with claim 13 wherein the oil based vehicle is present in an amount of from about 90 to about 99.5 percent by weight.
Claim 24
Dependent Claim
30 words
A method in accordance with claim 13 wherein the dyed polymer particles are present in an amount of from about 0.5 percent by weight to about 4 percent by weight.
Claim 25
Dependent Claim
91 words
A method in accordance with claim 13 wherein the dye selected for the polymer particles is selected from the group consisting of Orasol Blue GN, Orasol Red 2BL, Orasol Blue BLN, Orasol Black GN, Orasol Black RL, Orasol Yellow 2RLN, Orasol Red 2B, Orasol Blue 2GLN, Orasol Yellow 2GLN, Orasol Red G, Morfast Blue 100, Morfast Red 101, Morfast Red 104, Morfast Yellow 102, Morfast Black 101, Savinyl Yellow RLS, Savinyl Yellow 2RLS, Savinyl Pink 6BLS, Savinyl Red 3BLS, Savinyl Red GL5, Savinyl Black RLS, Neozapon Black X57, and Astrophalozine FF.
Claim 26
Dependent Claim
30 words
A method in accordance with claim 13 wherein the charge control additive is present in an amount of from about 0.01 percent by weight to about 2 percent by weight.
Claim 27
Dependent Claim
25 words
A developer composition in accordance with claim 1 wherein the average particle diameter of the composition particles is from about 2 to about 8 microns.
Claim 28
Dependent Claim
16 words
A developer composition in accordance with claim 1 wherein the stabilizer is a poly[ethylene-co-vinyl acetate-co-acrylic acid]terpolymer.
Claim 29
Dependent Claim
21 words
A developer composition in accordance with claim 1 wherein the stabilizer solubility temperature is from about 40° to about 60° C.
Claim 30
Dependent Claim
20 words
A method in accordance with claim 13 wherein the stabilizer solubility temperature is from about 40° to about 60° C.
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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) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |