US4971880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developer containing halogenated amorphous carbon particles prepared by plasma-polymerization
Assignee: Minolta Co Ltd
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Filing: 1989-06-06
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Granted: 1990-11-20
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Expires: 2009-06-06
Abstract
Abstract The present invention relates to a developer such as a toner and/or carrier for use in electrophotographic developing processes, and more specifically relates to a developer containing halogenated amorphous carbon particles prepared by plasma-polymerization, wherein the particles may take two forms, i.e., one with seed particles which is coated with the plasma-polymerized film containing at least carbon and halogen or the other without the seed particles which is formed by plasma-reacting carbon and halogen.
Inventors
- 👤 Hideo Hotomi
- 👤 Izumi Osawa
- 👤 Isao Doi
- 👤 Masanori Fujiwara
- 👤 Shuji Iino
- 👤 Kenji Masaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:56
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/09; G03G9/0902; G03G9/0904; G03G9/10; G03G9/113; G03G9/1131; G03G9/1139; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
34 words
A developer for use in developing an electrostatic latent image comprising a core and halogenated amorphous carbon particles prepared by plasma-polymerization wherein said particles are adhered to substantially the entire surface of the core.
Claim 2
Dependent Claim
34 words
A developer for use in developing an electrostatic latent image comprising a core and halogenated amorphous carbon particles prepared by plasma-polymerization wherein said particles are adhered to substantially the entire surface of the core.
Claim 3
Dependent Claim
32 words
A developer for use in developing an electrostatic latent image as claimed in claim 1, wherein said halogenated amorphous carbon particles contain halogen in an amount of 2 atomic % or greater.
Claim 4
Dependent Claim
33 words
A developer for use in developing an electrostatic latent image as claimed in claim 1, wherein said halogenated amorphous carbon particles contain hydrogen in an amount of about 10 to 60 atomic %.
Claim 5
Dependent Claim
32 words
A developer for use in developing an electrostatic latent image as claimed in claim 1, wherein said halogenated amorphous carbon particles have a mean particle size of about 0.005 to 0.50 μm.
Claim 6
Dependent Claim
52 words
A developer for use in developing an electrostatic latent image as claimed in claim 1, wherein said halogenated amorphous carbon particles include seed particles with plasma-polymerized films coated thereover which contain at least carbon and halogen, said halogenated amorphous carbon particles having a mean particle size of about 0.05 to 0.50 μm.
Claim 7
Dependent Claim
36 words
A developer for use in developing an electrostatic latent image as claimed in claim 5, wherein material of said seed particles is selected from the group consisting of metallic oxide, pigment, resin, wax, and magnetic material.
Claim 8
Dependent Claim
30 words
A developer for use in developing an electrostatic latent image as claimed in claim 1, wherein said halogenated amorphous carbon particles have volume resistivity of 9.9×10 9 (Ωcm) or less.
Claim 9
Dependent Claim
46 words
A carrier for use in developing an electrostatic latent image comprising a magnetic core and halogenated amorphous carbon particles prepared by plasma-polymerization wherein said particles are adhered on the surface of the core, said carrier having a mean particles size of about 20 to 90 μm.
Claim 10
Dependent Claim
46 words
A carrier for use in developing an electrostatic latent image comprising a magnetic core and halogenated amorphous carbon particles prepared by plasma-polymerization wherein said particles are adhered on the surface of the core, said carrier having a mean particles size of about 20 to 90 μm.
Claim 11
Dependent Claim
41 words
A carrier for use in developing an electrostatic latent image as claimed in claim 8, wherein said magnetic core is selected from the group consisting of iron, nickel, cobalt, zinc, antimuny, aluminum, iron oxide, titanium oxide, chrome nitride, and silicon carbide.
Claim 12
Dependent Claim
27 words
A carrier for use in developing an electrostatic latent image as claimed in claim 8, wherein said magnetic core is made of binder resin and magnetic powders.
Claim 13
Dependent Claim
42 words
A carrier for use in developing an electrostatic latent image as claimed in claim 8, wherein said plasma-polymerized particles are adhered in amount of 1 to 10 parts by weight based on the amount of 100 parts by weight of the core.
Claim 14
Dependent Claim
48 words
A toner for use in developing an electrostatic latent image comprising a binder resin core and halogenated amorphous carbon particles prepared by plasma-polymerization wherein said particles are adhered to cover the surface of the core, said toner having a mean particle size of about 4 to 20 μm.
Claim 15
Dependent Claim
48 words
A toner for use in developing an electrostatic latent image comprising a binder resin core and halogenated amorphous carbon particles prepared by plasma-polymerization wherein said particles are adhered to cover the surface of the core, said toner having a mean particle size of about 4 to 20 μm.
Claim 16
Dependent Claim
34 words
A toner for use in developing an electrostatic latent image as claimed in claim 12, wherein said binder resin core is selected from the group consisting of thermoplastic resin, thermoset resin, and photoset resin.
Claim 17
Dependent Claim
42 words
A toner for use in developing an electrostatic latent image as claimed in claim 12, wherein said plasma-polymerized particles are adhered in amount of 0.01 to 0.20 parts by weight based on the amount of 100 parts by weight of the core.
Claim 18
Dependent Claim
41 words
A developer for use in developing an electrostatic latent image comprising a core coated with an overcoat layer, said overcoat layer including binder resin and halogenated amorphous carbon particles prepared by plasma-polymerization with said particles uniformly dispersed in said binder resin.
Claim 19
Dependent Claim
41 words
A developer for use in developing an electrostatic latent image comprising a core coated with an overcoat layer, said overcoat layer including binder resin and halogenated amorphous carbon particles prepared by plasma-polymerization with said particles uniformly dispersed in said binder resin.
Claim 20
Dependent Claim
32 words
A developer for use in developing an electrostatic latent image as claimed in claim 15, wherein said halogenated amorphous carbon particles contain halogen in an amount of 2 atomic % or greater.
Claim 21
Dependent Claim
33 words
A developer for use in developing an electrostatic latent image as claimed in claim 15, wherein said halogenated amorphous carbon particles contain hydrogen in an amount of about 10 to 60 atomic %.
Claim 22
Dependent Claim
32 words
A developer for use in developing an electrostatic latent image as claimed in claim 15, wherein said halogenated amorphous carbon particles have a mean particle size of about 0.005 to 0.50 μm.
Claim 23
Dependent Claim
31 words
A developer for use in developing an electrostatic latent image comprising binder resin and halogenated amorphous carbon particles prepared by plasma-polymerization wherein said particles are uniformly dispersed in said binder resin.
Claim 24
Dependent Claim
31 words
A developer for use in developing an electrostatic latent image comprising binder resin and halogenated amorphous carbon particles prepared by plasma-polymerization wherein said particles are uniformly dispersed in said binder resin.
Claim 25
Dependent Claim
32 words
A developer for use in developing an electrostatic latent image as claimed in claim 19, wherein said halogenated amorphous carbon particles contain halogen in an amount of 2 atomic % or greater.
Claim 26
Dependent Claim
33 words
A developer for use in developing an electrostatic latent image as claimed in claim 19, wherein said halogenated amorphous carbon particles contain hydrogen in an amount of about 10 to 60 atomic %.
Claim 27
Dependent Claim
32 words
A developer for use in developing an electrostatic latent image as claimed in claim 19, wherein said halogenated amorphous carbon particles have a mean particle size of about 0.005 to 0.50 μm.
Claim 28
Dependent Claim
49 words
A carrier for use in developing an electrostatic latent image comprising binder resin and halogenated amorphous carbon particles prepared by plasma-polymerization, said particles are uniformly dispersed in said binder resin in amount of 1 to 10 parts by weight based on 100 parts by weight of the binder resin.
Claim 29
Dependent Claim
49 words
A carrier for use in developing an electrostatic latent image comprising binder resin and halogenated amorphous carbon particles prepared by plasma-polymerization, said particles are uniformly dispersed in said binder resin in amount of 1 to 10 parts by weight based on 100 parts by weight of the binder resin.
Claim 30
Dependent Claim
49 words
A toner for use in developing an electrostatic latent image comprising binder resin and halogenated amorphous carbon particles prepared by plasma-polymerization, said particles are uniformly dispersed in said binder resin in amount of 0.5 to 0.3 parts by weight based on 100 parts by weight of the binder resin.
Claim 31
Dependent Claim
49 words
A toner for use in developing an electrostatic latent image comprising binder resin and halogenated amorphous carbon particles prepared by plasma-polymerization, said particles are uniformly dispersed in said binder resin in amount of 0.5 to 0.3 parts by weight based on 100 parts by weight of the binder resin.
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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) | 1993-11-19 | 1994-05-21 | 1994-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-19 | 1998-05-21 | 1998-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-19 | 2002-05-21 | 2002-11-20 | $7700.00 | Window Closed / Lapsed |