US4610944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of toner
Assignee: Canon Inc
•
Filing: 1984-01-03
•
Granted: 1986-09-09
•
Expires: 2004-01-03
Abstract
Abstract A process for producing a toner, comprising the steps of suspending a molten mixture of starting materials of a binder containing a compound having a hydrocarbon chain and a colorant in an aqueous dispersing medium in the presence of a hardly water-soluble fine powdery inorganic dispersant, cooling the dispersed particles, and recovering the cooled particles.
Inventors
- 👤 Toru Matsumoto
- 👤 Masuo Yamazaki
- 👤 Katsutoshi Wakamiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:54
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08784; G03G9/08786; G03G9/0802; G03G9/0804; G03G9/097; G03G9/09708; G03G9/09725
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
94 words
A process for producing a toner and having a controlled and more uniform particle size distribution, comprising the steps of: melting a mixture of a long-chain binder compound having a melting point above room temperature, and a colorant; adding the molten mixture to a heated aqueous dispersing medium in the presence of a substantially water-insoluble fine powdery inorganic dispersant; stirring the added molten mixture and said aqueous dispersing medium to form suspended particles of said molten mixture dispersed in the aqueous dispersing medium; cooling the dispersed particles of said mixture; recovering the cooled particles.
Claim 2
Dependent Claim
94 words
A process for producing a toner and having a controlled and more uniform particle size distribution, comprising the steps of: melting a mixture of a long-chain binder compound having a melting point above room temperature, and a colorant; adding the molten mixture to a heated aqueous dispersing medium in the presence of a substantially water-insoluble fine powdery inorganic dispersant; stirring the added molten mixture and said aqueous dispersing medium to form suspended particles of said molten mixture dispersed in the aqueous dispersing medium; cooling the dispersed particles of said mixture; recovering the cooled particles.
Claim 3
Dependent Claim
45 words
A process according to claim 1, wherein the long-chain binder compound is selected from the group consisting of hydrocarbons, fatty acids, esters, metal soaps, metal salts or chlorides of fatty acids, fatty alcohols, polyhydric alcohols, fluorides, amides, and bisamides containing 12 to 50 carbon atoms,
Claim 4
Dependent Claim
56 words
A process according to claim 1, wherein the fine powdery inorganic dispersant is fine particles selected from the group consisting of BaSO 4 , CaSO 4 , BaCO 3 , CaCO 3 , MgCO 3 , Ca 3 (PO 4 ) 2 , talc, bentonite, silicic acid, diatomaceous earth, clay, aluminum oxide and SiO 2 .
Claim 5
Dependent Claim
19 words
A process according to claim 1, wherein the aqueous dispersing medium is heated to about 60° to 99° C.
Claim 6
Dependent Claim
106 words
A process for producing a toner, comprising the steps of: melting a mixture of a long-chain binder compound having a melting point above room temperature and a colorant, said mixture being chargeable either cationically or anionically; adding the molten mixture to a heated aqueous dispersing medium in the presence of a substantially water-insoluble fine powdery inorganic dispersant, said dispersant being chargeable to a polarity opposite to that of said mixture; stirring the added molten mixture and said aqueous dispersing medium to form suspended particles of said molten mixture dispersed in the aqueous dispersing medium; cooling the dispersed particles of said mixture; and recovering the cooled particles.
Claim 7
Dependent Claim
106 words
A process for producing a toner, comprising the steps of: melting a mixture of a long-chain binder compound having a melting point above room temperature and a colorant, said mixture being chargeable either cationically or anionically; adding the molten mixture to a heated aqueous dispersing medium in the presence of a substantially water-insoluble fine powdery inorganic dispersant, said dispersant being chargeable to a polarity opposite to that of said mixture; stirring the added molten mixture and said aqueous dispersing medium to form suspended particles of said molten mixture dispersed in the aqueous dispersing medium; cooling the dispersed particles of said mixture; and recovering the cooled particles.
Claim 8
Dependent Claim
45 words
A process according to claim 5, wherein the long-chain binder compound is selected from the group consisting of hydrocarbons, fatty acids, esters, metla soaps, metal salts or chlorides of fatty acids, fatty alcohols, polyhydric alcohols, fluorides, amides, and bisamides containing 12 to 50 carbon atoms.
Claim 9
Dependent Claim
56 words
A process according to claim 5, wherein the fine powdery inorganic dispersant is fine particles selected from the group consisting of BaSO 4 , CaSO 4 , BaCO 3 , CaCO 3 , MgCO 3 , Ca 3 (PO 4 ) 2 , talc, bentonite, silicic acid, diatomaceous earth, clay, aluminum oxide and SiO 2 .
Claim 10
Dependent Claim
19 words
A process according to claim 5, wherein the aqueous dispersing medium is heated to about 60° to 99° C.
Claim 11
Dependent Claim
30 words
A process according to claim 5 wherein the mixture contains a cationic compound or a substantially water-insoluble organic amine compound and is used in combination with an anionic inorganic dispersant.
Claim 12
Dependent Claim
14 words
A process according to claim 9, wherein the cationic compound is a cationic polymer.
Claim 13
Dependent Claim
21 words
A process according to claim 9, wherein the cationic compound is a cationic monomer graft polymerized onto the long-chain binder compound.
Claim 14
Dependent Claim
22 words
A process according to claim 9, wherein the anionic inorganic dispersant is selected from the group consisting of colloidal silica and bentonite.
Claim 15
Dependent Claim
23 words
A process according to claim 5, wherein the mixture contains an anionic compound and is used in combination with a cationic inorganic dispersant.
Claim 16
Dependent Claim
14 words
A process according to claim 13, wherein the anionic compound is an anionic polymer.
Claim 17
Dependent Claim
21 words
A process according to claim 13, wherein the anionic compound is an anionic monomer graft polymerized onto the long-chain binder compound.
Claim 18
Dependent Claim
15 words
A process according to claim 13, wherein the cationic inorganic dispersant comprises aluminum oxide particles.
Claim 19
Dependent Claim
92 words
A process for producing a toner, comprising the steps of: melting a mixture of a long-chain binder compound having a melting point above room temperature and a colorant; adding the molten mixture to a heated aqueous dispersing medium in the presence of a substantially water-insoluble fine powdery inorganic dispersant; stirring the added molten mixture and said aqueous dispersing medium to form suspended particles of said molten mixture dispersed in the aqueous dispersing medium; cooling the dispersed particles of said mixture; recovering the cooled particles; and coating the recovered particles with a resin.
Claim 20
Dependent Claim
92 words
A process for producing a toner, comprising the steps of: melting a mixture of a long-chain binder compound having a melting point above room temperature and a colorant; adding the molten mixture to a heated aqueous dispersing medium in the presence of a substantially water-insoluble fine powdery inorganic dispersant; stirring the added molten mixture and said aqueous dispersing medium to form suspended particles of said molten mixture dispersed in the aqueous dispersing medium; cooling the dispersed particles of said mixture; recovering the cooled particles; and coating the recovered particles with a resin.
Claim 21
Dependent Claim
45 words
A process according to claim 17, wherein the long-chain binder compound is selected from the group consisting of hydrocarbons, fatty acids, esters, metal soaps, metal salts or chlorides of fatty acids, fatty alcohols, polyhydric alcohols, fluorides, amides, and bisamides containing 12 to 50 carbon atoms.
Claim 22
Dependent Claim
56 words
A process according to claim 17, wherein the fine powdery inorganic dispersant is fine particles selected from the group consisting of BaSO 4 , CaSO 4 , BaCO 3 , CaCO 3 , MgCO 3 , Ca 3 (PO 4 ) 2 , talc, bentonite, silicic acid, diatomaceous earth, clay, aluminum oxide and SiO 2 .
Claim 23
Dependent Claim
19 words
A process according to claim 17, wherein the aqueous dispersing medium is heated to about 60° to 99° C.
Claim 24
Dependent Claim
21 words
A process according to claim 17, wherein the resin coating is applied on the recovered particles by the phase separation method.
Claim 25
Dependent Claim
28 words
A process according to claim 21, wherein the resin coating is carried out by dispersing the recovered particles in a resin solutin and spray drying the resultant dispersion.
Claim 26
Dependent Claim
113 words
A process for producing a toner, comprising the steps of: melting a mixture of a long-chain binder compound having a melting point above room temperature and a colorant, said mixture being chargeable either cationically or anionically; adding the molten mixture to a heated aqueous dispersing medium in the presence of a substantially water-insoluble fine powdery inorganic dispersant, said dispersant being chargeable to a polarity opposite to that of said mixture; stirring the added molten mixture and said aqueous dispersing medium to form suspended particles of said molten mixture dispersed in the aqueous dispersing medium; cooling the dispersed particles of said mixture; recovering the cooled particles; and coating the recovered particles with a resin.
Claim 27
Dependent Claim
113 words
A process for producing a toner, comprising the steps of: melting a mixture of a long-chain binder compound having a melting point above room temperature and a colorant, said mixture being chargeable either cationically or anionically; adding the molten mixture to a heated aqueous dispersing medium in the presence of a substantially water-insoluble fine powdery inorganic dispersant, said dispersant being chargeable to a polarity opposite to that of said mixture; stirring the added molten mixture and said aqueous dispersing medium to form suspended particles of said molten mixture dispersed in the aqueous dispersing medium; cooling the dispersed particles of said mixture; recovering the cooled particles; and coating the recovered particles with a resin.
Claim 28
Dependent Claim
45 words
A process according to claim 23, wherein the long-chain binder compound is selected from the group consisting of hydrocarbons, fatty acids, esters, metal soaps, metal salts or chlorides of fatty acids, fatty alcohols, polyhydric alcohols, fluorides, amides, and bisamides containing 12 to 50 carbon atoms.
Claim 29
Dependent Claim
56 words
A process according to claim 23, wherein the fine powdery inorganic dispersant is fine particles selected from the group consisting of BaSO 4 , CaSO 4 , BaCO 3 , CaCO 3 , MgCO 3 , Ca 3 (PO 4 ) 2 , talc, bentonite, silicic acid, diatomaceous earth, clay, aluminum oxide and SiO 2 .
Claim 30
Dependent Claim
19 words
A process according to claim 23, wherein the aqueous dispersing medium is heated to about 60° to 99° C.
Claim 31
Dependent Claim
30 words
A process according to claim 23 wherein the mixture contains a cationic compound or a substantially water-insoluble organic amine compound and is used in combination with an anionic inorganic dispersant.
Claim 32
Dependent Claim
14 words
A process according to claim 27, wherein the cationic compound is a cationic polymer.
Claim 33
Dependent Claim
21 words
A process according to claim 27, wherein the cationic compound is a cationic monomer graft polymerized onto the long-chain binder compound.
Claim 34
Dependent Claim
22 words
A process according to claim 27, wherein the anionic inorganic dispersant is selected from the group consisting of colloidal silica and bentonite.
Claim 35
Dependent Claim
23 words
A process according to claim 23, wherein the mixture contains an anionic compound and is used in combination with a cationic inorganic dispersant.
Claim 36
Dependent Claim
14 words
A process according to claim 31, wherein the anionic compound is an anionic polymer.
Claim 37
Dependent Claim
21 words
A process according to claim 31, wherein the anionic compound is an anionic monomer graft polymerized onto the long-chain binder compound.
Claim 38
Dependent Claim
15 words
A process according to claim 31, wherein the cationic inorganic dispersant comprises aluminum oxide particles.
Claim 39
Dependent Claim
9 words
Toner produced according to the process of claim 1.
Claim 40
Dependent Claim
9 words
Toner produced according to the process of claim 5.
Claim 41
Dependent Claim
9 words
Toner produced according to the process of claim 17.
Claim 42
Dependent Claim
9 words
Toner produced according to the process of claim 23.
References Cited (Backward Citations)
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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) | 1989-09-08 | 1990-03-10 | 1990-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-08 | 1994-03-10 | 1994-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-08 | 1998-03-10 | 1998-09-09 | $7700.00 | Window Closed / Lapsed |