Patent US4940643A successfully refreshed from Google Patents.
US4940643A
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US
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Recording system having a coating device for coating recording medium or photosensitive medium with developer material reacting with color precursor
Assignee: Brother Industries Ltd
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Filing: 1988-12-27
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Granted: 1990-07-10
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Expires: 2008-12-27
Abstract
Abstract A toner for forming a developer medium which is capable of reacting with a chromogenic material to produce a visible dye image, comprising developer particles and thermoplastic particles. Each developer particle includes a developer material capable of reacting with the chromogenic material. The thermoplastic resin particles has a smaller grain size than the developer particles. Each developer particle carries a multiplicity of the thermoplastic particles deposited on its surface.
Inventors
- 👤 Jun Sakai
- 👤 Shunichi Higashiyama
- 👤 Koji Suzuki
- 👤 Mitsuru Ohta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:06
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/09; G03G9/0928; Y; Y10; Y10S; Y10S430/00; Y10S430/136
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
68 words
A toner for forming a developer medium which is capable of reacting with a chromogenic material to produce a visible dye image, comprising: developer particles each including a developer material capable of reacting with said chromogenic material; and thermoplastic resin particles having a smaller grain size than said developer particles, each of said developer particles carrying a multiplicity of said thermoplastic resin particles deposited on a surface thereof.
Claim 2
Dependent Claim
68 words
A toner for forming a developer medium which is capable of reacting with a chromogenic material to produce a visible dye image, comprising: developer particles each including a developer material capable of reacting with said chromogenic material; and thermoplastic resin particles having a smaller grain size than said developer particles, each of said developer particles carrying a multiplicity of said thermoplastic resin particles deposited on a surface thereof.
Claim 3
Dependent Claim
20 words
A toner for forming a developer medium according to claim 1, wherein said thermoplastic resin particles consist of polymethyl methacrylate.
Claim 4
Dependent Claim
35 words
A toner for forming a developer medium according to claim 1, wherein a ratio of an average grain size of said thermoplastic resin particles to that of said developer particles ranges from 1/5 to 1/50.
Claim 5
Dependent Claim
27 words
A toner for forming a developer medium according to claim 3, wherein said average grain size of said thermoplastic resin particles ranges from 0.05 to 5 microns.
Claim 6
Dependent Claim
27 words
A toner for forming a developer medium according to claim 4, wherein said average grain size of said thermoplastic resin particles ranges from 0.15 to 0.4 micron.
Claim 7
Dependent Claim
33 words
A toner for forming a developer medium according to claim 1, wherein each of said developer particles comprises said developer material, and a binder for coagulating said developer material into a coherent mass.
Claim 8
Dependent Claim
127 words
A toner for forming a developer medium according to claim 6, wherein said developer material comprises at least one material selected from the group consisting of: mineral clays selected from the group including acid earth, active clay and attapulgite; organic acids selected from the group including tannic acid and gallic acid; esters selected from the group including propyl gallic acid ester; acidic polymers selected from the group including phenol-formaldehyde resins, phenol-acetylene condensation polymer resins, condensation polymers of carboxylic acid having at least one hydroxy radical and formaldehyde; metal salts of aromatic carboxylic acids selected from the group including zinc salicylates, tin salicylates, zinc 2-hydroxynaphthoic acid, zinc 3,5-di-tert-butyl salicylic acid, and zinc α-methylbenzyl salicylic acid; oil-soluble metal salts of phenol-formaldehyde novolak resin modified by zinc; and zinc carbonate.
Claim 9
Dependent Claim
56 words
A toner for forming a developer medium according to claim 6, wherein said binder comprises at least one material selected from the group consisting of: polystyrenes and/or copolymers thereof; polyesters and/or copolymers thereof; expoxy, acrylate, methacrylate, and/or copolymers thereof; silicone resins; polypropylenes and/or copolymers thereof; waxes; fluorine-contained resins; polyamides; polyvinyl alcohol; polyurethane; polyurea; and phenolic resins.
Claim 10
Dependent Claim
35 words
A toner for forming a developer medium according to claim 1, wherein said developer particles are formed by dispersing or dissolving said developer material in a solvent, and spraying said solvent by a spray drier.
Claim 11
Dependent Claim
49 words
A toner for forming a developer medium according to claim 11, wherein said developer particles are formed by heating a mixture of said developer material and said binder so as to produce a melt of said mixture, solidifying said melt into a solid mass, and milling said solid mass.
Claim 12
Dependent Claim
41 words
A toner for forming a developer medium according to claim 1, wherein said thermoplastic resin particles are mixed with said developer particles by a mixer, such that said thermoplastic resin particles are deposited on the surface of said each developer particle.
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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) | 1993-07-09 | 1994-01-08 | 1994-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-09 | 1998-01-08 | 1998-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-09 | 2002-01-08 | 2002-07-10 | $7700.00 | Window Closed / Lapsed |