US4940643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording system having a coating device for coating recording medium or photosensitive medium with developer material reacting with color precursor
Assignee: Brother Industries Ltd
•
Filing: 1988-12-27
•
Granted: 1990-07-10
•
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 17:02
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.
References Cited (Backward Citations)
GB998011A
Cited
GB921673A
Cited
GB1013101A
Cited
US4307165A
Cited
GB2111232A
Cited
US4399209A
Cited
US4440846A
Cited
GB2172123A
Cited
GB2172711A
Cited
GB2187298A
Cited
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 |