US4271248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic latent image toner material and process for its use in flash fusing developing
Assignee: Xerox Corp
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Filing: 1980-01-28
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Granted: 1981-06-02
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Expires: 2000-01-28
Abstract
Abstract A method for developing magnetic latent images comprising forming a latent image on a suitable substrate and contacting said image with a magnetic toner which comprises a magnetic material and a resin comprising a polymeric esterification product of a dicarboxylic acid and a diol comprising a diphenol is disclosed.
Inventors
- 👤 Stephen L. Gaudioso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:34
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/083; G03G9/0831; G03G9/0833; G03G9/0832; G03G9/087; G03G9/08742; G03G9/08755
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
204 words
A method for developing magnetic latent images which comprises forming a magnetic latent image on a suitable substrate, contacting the image with a magnetic toner, transferring the image to a suitable substrate, followed by flash fusing the magnetic toner to said substrate, the toner particles having a pile height that ranges from about 3 microns to about 30 microns, the magnetic toner being comprised of a magnetic material and a resin comprising a polymeric esterification product of a dicarboxylic acid and a diol comprising a diphenol of the following formula: ##STR2## wherein R is selected from the group consisting of alkylene radicals having from 2 to 12 carbon atoms, alkylidene radicals having from 1 to 12 carbon atoms and cycloalkylidene radicals having from 3 to 12 carbon atoms; R' and R" are selected from the group consisting of alkylene radicals having from 2 to 12 carbon atoms and alkylene arylene radicals having from 8 to 12 carbon atoms; X and X' are selected from the group consisting of hydrogen and alkyl radicals having from 1 to 4 carbon atoms; and n 1 and n 2 are each at least 1 and the average sum of n 1 and n 2 is less than 21.
Claim 2
Independent Claim
204 words
A method for developing magnetic latent images which comprises forming a magnetic latent image on a suitable substrate, contacting the image with a magnetic toner, transferring the image to a suitable substrate, followed by flash fusing the magnetic toner to said substrate, the toner particles having a pile height that ranges from about 3 microns to about 30 microns, the magnetic toner being comprised of a magnetic material and a resin comprising a polymeric esterification product of a dicarboxylic acid and a diol comprising a diphenol of the following formula: ##STR2## wherein R is selected from the group consisting of alkylene radicals having from 2 to 12 carbon atoms, alkylidene radicals having from 1 to 12 carbon atoms and cycloalkylidene radicals having from 3 to 12 carbon atoms; R' and R" are selected from the group consisting of alkylene radicals having from 2 to 12 carbon atoms and alkylene arylene radicals having from 8 to 12 carbon atoms; X and X' are selected from the group consisting of hydrogen and alkyl radicals having from 1 to 4 carbon atoms; and n 1 and n 2 are each at least 1 and the average sum of n 1 and n 2 is less than 21.
Claim 3
Dependent Claim
74 words
A method according to claim 1 wherein said dicarboxylic acid is selected from the group consisting of acids having the general formula HOOCR'"n.sub.3 COOH and anhydrides thereof wherein R'" is selected from the group consisting of alkylene radicals having from 1 to 12 carbon atoms, alkenylene radicals having from 1 to 12 carbon atoms, arylene radicals and alkylene arylene radicals having from 10 to 12 carbon atoms and n 3 is less than 2.
Claim 4
Dependent Claim
22 words
A method according to claim 1 wherein said polymeric esterification product is a condensation product of 2,2 bis (4-hydroxy-isopropoxyphenyl)-propane and fumaric acid.
Claim 5
Dependent Claim
23 words
A method according to claim 1 wherein said polymeric esterification product is a condensation product of 2,2 bis (4-hydroxyisopropoxy-phenyl)-propane and 2,2-dimethyl fumaric acid.
Claim 6
Dependent Claim
23 words
A method according to claim 1 wherein said polymeric esterification product is a condensation reaction product of 2,2 bis (4-hydroxybutoxy-phenyl)-propane and fumaric acid.
Claim 7
Dependent Claim
23 words
A method according to claim 1 wherein said polymeric esterification product is a condensation product of 2,2 bis (4-hydroxy-butoxyphenyl)-propane and 2,2-dimethyl fumaric acid.
Claim 8
Dependent Claim
23 words
A method according to claim 1 wherein said polymeric esterification product is a condensation product of 2,2 bis (4-hydroxy-ethoxy phenyl)-propane and fumaric acid.
Claim 9
Dependent Claim
35 words
A method according to claim 1 wherein said magnetic toner comprises between about 40% to about 90% by weight of said magnetic material and between about 10% to about 60% by weight of said resin.
Claim 10
Dependent Claim
35 words
A method according to claim 1 wherein said magnetic toner comprises between about 50% to about 75% by weight of said magnetic material and between about 25% to about 50% by weight of said resin.
Claim 11
Dependent Claim
24 words
A method according to claim 1 wherein said magnetic material is selected from the group consisting of magnetites, metals, metal oxides, ferrites or alloys.
Claim 12
Dependent Claim
12 words
A method according to claim 10 wherein said magnetite is Mapico Black.
Claim 13
Dependent Claim
23 words
A method according to claim 11 wherein said Mapico Black is present in an amount between about 40% and about 80% by weight.
Claim 14
Dependent Claim
16 words
A method according to claim 11 wherein about 65% by weight of Mapico Black is present.
Claim 15
Dependent Claim
15 words
A method according to claim 1 wherein said magnetic toner further contains a flow agent.
Claim 16
Dependent Claim
13 words
A method according to claim 14 wherein said flow agent comprises Silanox 101.
Claim 17
Dependent Claim
21 words
A method according to claim 1 wherein the toner particles range in size from about 3 microns to about 20 microns.
Claim 18
Dependent Claim
21 words
A method according to claim 16 wherein the toner particles range in size from about 5 microns to about 12 microns.
Claim 19
Dependent Claim
21 words
A method according to claim 17 wherein the toner particles range in size from about 6 microns to about 9 microns.
Claim 20
Dependent Claim
20 words
A method according to claim 1 wherein the toner pile height ranges from about 5 microns to about 20 microns.
Claim 21
Dependent Claim
20 words
A method according to claim 1 wherein the toner pile height ranges from about 7 microns to about 15 microns.
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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) | 1984-06-01 | 1984-12-01 | 1985-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-01 | 1988-12-01 | 1989-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-01 | 1992-12-01 | 1993-06-02 | $7700.00 | Window Closed / Lapsed |