US4465755A
Expired / Lapsed
US
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Pressure fixable electrostatographic toner material comprising encapsulated particles containing curing agent
Assignee: Fujifilm Holdings Corp
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Filing: 1982-10-19
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Granted: 1984-08-14
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Expires: 2002-10-19
Abstract
Abstract An electrostatographic toner material suitably employable for the pressure fixing process, which comprises encapsulated toner particles having an average particle size in the range from about 0.5 to 1,000 microns, in which the toner particle comprises a pressure fixable adhesive core material containing a colorant and a curable substance and a pressure rupturable shell enclosing the core material, the outer surface of the shell being provided with a curing agent capable of curing said curable substance. The curable substance and the curing agent can be separately incorporated into the core materials of the different encapsulated toner particles.
Inventors
- 👤 Masataka Kiritani
- 👤 Takeshi Mikami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:29
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/14; B01J13/16; G; G03; G03G; G03G9/00; G03G9/08; G03G9/093; G03G9/09307; G03G9/09335; G03G9/0935; G03G9/09378; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
69 words
An electrostatographic toner material comprising encapsulated toner particles having an average particle size in the range from about 0.5 to about 1,000 microns, in which the toner particle comprises a pressure fixable adhesive core material containing a colorant and a curable substance and a pressure rupturable shell enclosing the core material, the outer surface of the shell being provided with a curing agent capable of curing said curable substance.
Claim 2
Dependent Claim
69 words
An electrostatographic toner material comprising encapsulated toner particles having an average particle size in the range from about 0.5 to about 1,000 microns, in which the toner particle comprises a pressure fixable adhesive core material containing a colorant and a curable substance and a pressure rupturable shell enclosing the core material, the outer surface of the shell being provided with a curing agent capable of curing said curable substance.
Claim 3
Dependent Claim
91 words
An electrostatographic toner material comprising encapsulated toner particles having an average particle size in the range from about 0.5 to about 1,000 microns, in which the encapsulated toner particles comprise both of: a toner particle comprising a pressure fixable adhesive core material containing a colorant and a curable substance and a pressure rupturable shell enclosing the core material; and a toner particle comprising a pressure fixable adhesive core material containing a colorant and a curing agent capable of curing said curable substance and a pressure rupturable shell enclosing the core material.
Claim 4
Dependent Claim
91 words
An electrostatographic toner material comprising encapsulated toner particles having an average particle size in the range from about 0.5 to about 1,000 microns, in which the encapsulated toner particles comprise both of: a toner particle comprising a pressure fixable adhesive core material containing a colorant and a curable substance and a pressure rupturable shell enclosing the core material; and a toner particle comprising a pressure fixable adhesive core material containing a colorant and a curing agent capable of curing said curable substance and a pressure rupturable shell enclosing the core material.
Claim 5
Dependent Claim
21 words
The electrostatographic toner material as claimed in claim 1 or 2, in which the curable substance is a polyvalent isocyanate adduct.
Claim 6
Dependent Claim
20 words
The electrostatographic toner material as claimed in claim 1 or 2, in which the curable substance is an epoxy compound.
Claim 7
Dependent Claim
20 words
The electrostatographic toner material as claimed in claim 1 or 2, in which the curable substance is an unsaturated polyester.
Claim 8
Dependent Claim
19 words
The electrostatographic toner material as claimed in claim 1 or 2, in which the curable substance is a polysulfide.
Claim 9
Dependent Claim
22 words
The electrostatographic toner material as claimed in claim 1 or 2, in which the curable substance is a polyurethane-polyacrylate or a polyurethane-polymethacrylate.
Claim 10
Dependent Claim
30 words
The electrostatographic toner material as claimed in claim 1 or 2, in which the shell is made of a polymer selected from the group consisting of polyurethane, polyurea and polythiourethane.
Claim 11
Dependent Claim
25 words
The electrostatographic toner material as claimed in claim 8, in which the shell is made substantially of a polycondensation product of polyisocyanate, polyol and water.
Claim 12
Dependent Claim
25 words
The electrostatographic toner material as claimed in claim 8, in which the shell is made substantially of a polycondensation product of polyisocyanate, polyol and polyamine.
Claim 13
Dependent Claim
37 words
The electrostatographic toner material as claimed in claim 1 or 2, in which the shell is composed substantially of a complex layer comprising two or more polymers selected from the group consisting of polyurethane, polyurea and polyamide.
Claim 14
Dependent Claim
32 words
The electrostatographic toner material as claimed in claim 1 or 2, in which the pressure fixable adhesive core material is a liquid medium boiling at a temperature of higher than 180° C.
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) | 1987-08-14 | 1988-02-13 | 1988-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-14 | 1992-02-13 | 1992-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-14 | 1996-02-13 | 1996-08-14 | $7700.00 | Window Closed / Lapsed |