US4520090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic toner
Assignee: Konica Minolta Inc
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Filing: 1983-05-31
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Granted: 1985-05-28
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Expires: 2003-05-31
Abstract
Abstract There is disclosed a magnetic toner comprising a magnetic powder and a compound having the following general formula: ##STR1## wherein R 1 , R 2 , R 3 , A and M are the same as defined in the specification. The magnetic toner of the present invention has a high degree of blackening and permits the stable formation of a sharp image.
Inventors
- 👤 Hiroshi Yamazaki
- 👤 Kiyoshi Tamaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:19
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/097; G03G9/09783; G03G9/093; G03G9/09733; G03G9/09775
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
83 words
A magnetic toner which comprises a magnetic toner powder, a binder and a compound having the formula: ##STR4## wherein R 1 represents an alkyl group or an alkenyl group each having 4 to 30 carbon atoms; R 2 represents a hydrogen atom or a methyl group; R 3 represents an alkylene group having 1 to 4 carbon atoms; A represents a carbonyl group or a sulfonyl group; and M represents a hydrogen atom, an alkali metal, an alkali earth metal or an amine.
Claim 2
Dependent Claim
83 words
A magnetic toner which comprises a magnetic toner powder, a binder and a compound having the formula: ##STR4## wherein R 1 represents an alkyl group or an alkenyl group each having 4 to 30 carbon atoms; R 2 represents a hydrogen atom or a methyl group; R 3 represents an alkylene group having 1 to 4 carbon atoms; A represents a carbonyl group or a sulfonyl group; and M represents a hydrogen atom, an alkali metal, an alkali earth metal or an amine.
Claim 3
Dependent Claim
32 words
The magnetic toner according to claim 1, wherein the amount of said compound is within the range of 0.01 to 2% by weight based on the weight of said magnetic toner powder.
Claim 4
Dependent Claim
43 words
The magnetic toner according to claim 1, wherein said magnetic toner powder is composed of powder particles selected from the group consisting of iron, nickel, cobalt, manganese, copper and alloys of the same; and oxides of iron, nickel, cobalt, manganese, copper and aluminum.
Claim 5
Dependent Claim
24 words
The magnetic toner according to claim 1, wherein said magnetic toner powder is composed of particles having a diameter of from 0.1 to 5μ.
Claim 6
Dependent Claim
31 words
The magnetic toner according to claim 1, wherein said magnetic toner powder is present in an amount of 30 to 70% by weight based on the weight of said magnetic toner.
Claim 7
Dependent Claim
17 words
The magnetic toner according to claim 1, wherein said toner is used in a pressure fixation process.
Claim 8
Dependent Claim
53 words
The magnetic toner according to claim 1, wherein said binder is a thermoplastic resin selected from the group consisting of polymers obtained from monomers of styrenes, esters of α-methylene aliphatic monocarboxylic acids, vinylnitriles, vinylpyridines, vinylethers, vinylketones, unsaturated hydrocarbons, halides of unsaturated hydrocarbons, halogenated unsaturated hydrocarbons, non-vinyl condensation resins, vinyl resins and mixtures thereof.
Claim 9
Dependent Claim
16 words
The magnetic toner according to claim 1, wherein said magnetic toner is a micro-capsule type toner.
Claim 10
Dependent Claim
15 words
The magnetic toner according to claim 1, wherein said magnetic toner further comprises a colorant.
Claim 11
Dependent Claim
29 words
The magnetic toner according to claim 9, wherein said colorant is present in an amount of 0.5 to 10% by weight based on the weight of said magnetic toner.
Claim 12
Dependent Claim
31 words
The magnetic toner according to claim 5, wherein said magnetic toner powder is present in an amount of 40 to 65% by weight based on the weight of said magnetic toner.
Claim 13
Dependent Claim
129 words
A magnetic toner which comprises a binder, a magnetic toner powder in an amount of 30 to 70% by weight based on the weight of said magnetic toner, said magnetic toner powder being composed of particles having a diameter of 0.1 to 5μ, and 0.01 to 2% by weight based on the weight of said magnetic powder of a compound having the formula: ##STR5## wherein R 1 represents an alkyl group or an alkenyl group each having 4 to 30 carbon atoms; R 2 represents a hydrogen atom or a methyl group; R 3 represents an alkylene group having 1 to 4 carbon atoms; A represents a carbonyl group or a sulfonyl group; and M represents a hydrogen atom, an alkali metal, an alkali earth metal or an amine.
Claim 14
Dependent Claim
129 words
A magnetic toner which comprises a binder, a magnetic toner powder in an amount of 30 to 70% by weight based on the weight of said magnetic toner, said magnetic toner powder being composed of particles having a diameter of 0.1 to 5μ, and 0.01 to 2% by weight based on the weight of said magnetic powder of a compound having the formula: ##STR5## wherein R 1 represents an alkyl group or an alkenyl group each having 4 to 30 carbon atoms; R 2 represents a hydrogen atom or a methyl group; R 3 represents an alkylene group having 1 to 4 carbon atoms; A represents a carbonyl group or a sulfonyl group; and M represents a hydrogen atom, an alkali metal, an alkali earth metal or an amine.
Claim 15
Dependent Claim
39 words
The magnetic toner according to claim 12, wherein said magnetic toner powder is selected from the group consisting of iron, nickel, cobalt, manganese, copper and alloys of the same; and oxides of iron, nickel, cobalt, manganese, copper and aluminum.
Claim 16
Dependent Claim
17 words
The magnetic toner according to claim 12, wherein said toner is used in a pressure fixation process.
Claim 17
Dependent Claim
53 words
The magnetic toner according to claim 12, wherein said binder is a thermoplastic resin selected from the group consisting of polymers obtained from monomers of styrenes, esters of α-methylene aliphatic monocarboxylic acids, vinylnitriles, vinylpyridines, vinylethers, vinylketones, unsaturated hydrocarbons, halides of unsaturated hydrocarbons, halogenated unsaturated hydrocarbons, non-vinyl condensation resins, vinyl resins and mixtures thereof.
Claim 18
Dependent Claim
16 words
The magnetic toner according to claim 12, wherein said magnetic toner is a micro-capsule type toner.
Claim 19
Dependent Claim
15 words
The magnetic toner according to claim 12, wherein said magnetic toner further comprises a colorant.
Claim 20
Dependent Claim
29 words
The magnetic toner according to claim 17, wherein said colorant is present in an amount of 0.5 to 10% by weight based on the weight of said magnetic toner.
Claim 21
Dependent Claim
31 words
The magnetic toner according to claim 12, wherein said magnetic toner powder is present in an amount of 40 to 65% by weight based on the weight of said magnetic toner.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |