Patent US4745030A successfully refreshed from Google Patents.
US4745030A
Expired / Lapsed
US
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Electrostatic recording device
Assignee: Canon Inc
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Filing: 1985-10-09
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Granted: 1988-05-17
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Expires: 2005-10-09
Abstract
Abstract An electrostatic recording device of transfer system provided with a recording medium having a dielectric layer and an electroconductive substrate is disclosed in which the recording medium has a dielectric layer containing a fluorine-containing block copolymer.
Inventors
- 👤 Kozo Arahara
- 👤 Tatsuo Takeuchi
- 👤 Yoshio Takasu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:25
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/385; B41J2/41; B41J2/415; G; G03; G03G; G03G5/00; G03G5/02; G03G5/0202; G03G5/0205; G03G5/0208; G03G5/0211; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
56 words
An electrostatic recording device for a transfer system provided with a recording medium having a dielectric layer and an electroconductive substrate, said recording medium having a dielectric layer containing a resin for film formation and a fluorine-containing block copolymer comprising a polymer having a fluorine-containing monomer component block copolymerized at one end of a non-fluorine-containing polymer.
Claim 2
Dependent Claim
56 words
An electrostatic recording device for a transfer system provided with a recording medium having a dielectric layer and an electroconductive substrate, said recording medium having a dielectric layer containing a resin for film formation and a fluorine-containing block copolymer comprising a polymer having a fluorine-containing monomer component block copolymerized at one end of a non-fluorine-containing polymer.
Claim 3
Dependent Claim
28 words
An electrostatic recording device according to claim 1, wherein said fluorine-containing block copolymer is contained in said dielectric layer in an amount of 0.1 to 50% by weight.
Claim 4
Dependent Claim
37 words
An electrostatic recording device according to claim 1, wherein the resin for film formation to be used as the consituent of said dielectric layer has a surface resistance after film formation of 10 12 Ω or higher.
Claim 5
Dependent Claim
24 words
An electrostatic recording device according to claim 1, wherein the volume resistivity of the resin for film formation is 10 13 Ω.cm or higher.
Claim 6
Dependent Claim
42 words
An electrostatic recording device according to claim 1, wherein said dielectric layer contains a resin for film formation having a pencil hardness characteristic of H or more and a volume resistivity of 10 13 Ω.cm or higher and a fluorine-containing block copolymer.
Claim 7
Dependent Claim
54 words
An electrostatic recording device according to claim 1, wherein said film for film formation is at least one selected from the group of resins consisting of polyimide, polyamide-imide, polyamide, polyesterimide, polyester, polyvinylformal epoxy resin, polyurethane, melamine resin, acrylic resin, polymethyl methacrylate silicone polyimide resin, silicone resin, polyacrylamideimide, epoxy resin, urethaneacrylate resin and epoxyacrylate resin.
Claim 8
Dependent Claim
23 words
An electrostatic recording device according to claim 1, wherein said dielectric layer is provided on the electroconductive substrate or through another dielectric layer.
Claim 9
Dependent Claim
32 words
An electrostatic recording device according to claim 1, wherein said fluorine-containing block copolymer is a block copolymer having a polymer having fluorine-containing alkyl group block-copolymerized at one end of a non-fluorine-containing polymer.
Claim 10
Dependent Claim
17 words
An electrostatic recording device according to claim 6, wherein said non-fluorine-containing polymer has a vinyl monomer component.
Claim 11
Dependent Claim
20 words
An electrostatic recording device according to claim 9, wherein said non-fluorine-containing polymer is a polyalkyl acrylate or a polyalkyl methacrylate.
Claim 12
Dependent Claim
57 words
An electrostatic recording device for a pressure transfer system provided with a recording medium having a dielectric layer and an electroconductive substrate, said recording medium having a dielectric layer containing a resin for film formation and a fluoride-containing block copolymer comprising a polymer having a fluorine-containing monomer component block copolymerized at one end of a non-fluorine-containing polymer.
Claim 13
Dependent Claim
57 words
An electrostatic recording device for a pressure transfer system provided with a recording medium having a dielectric layer and an electroconductive substrate, said recording medium having a dielectric layer containing a resin for film formation and a fluoride-containing block copolymer comprising a polymer having a fluorine-containing monomer component block copolymerized at one end of a non-fluorine-containing polymer.
Claim 14
Dependent Claim
21 words
An electrostatic recording device according to claim 11, wherein said pressure transfer system is the pressure transfer system simultaneous with fixing.
Claim 15
Dependent Claim
49 words
An electrostatic recording device according to claim 11, wherein said dielectric layer contains, together with the fluorine-containing block copolymer, a resin for film formation having a surface resistance after film formation 10 12 Ω or higher and inorganic fine powder having a volume resistivity less than 10 10 Ω.cm.
Claim 16
Dependent Claim
45 words
An electrostatic recording device according to claim 13, wherein said dielectric layer contains 100 parts by weight of the resin for film formation, 0.01 to 300 parts by weight of the fluorine-containing block copolymer and 0.1 to 300 parts by weight of inorganic fine powder.
Claim 17
Dependent Claim
49 words
An electrostatic recording device according to claim 11, wherein said dielectric layer contains, together with the fluorine-containing block copolymer, a resin for film formation having a surface resistance after film formation 10 12 Ω or higher and inorganic powder having a volume resistivity of 10 10 Ω.cm or higher.
Claim 18
Dependent Claim
44 words
An electrostatic recording device according to claim 15, wherein said dielectric layer contains 100 parts by weight of inorganic powder, 0.001 to 300 parts by weight of the fluorine-containing block copolymer and 5 to 300 parts by weight of the resin for film formation.
Claim 19
Dependent Claim
64 words
An electrostatic recording device according to claim 11, wherein said dielectric layer contains, together with (B) the fluorine-containing block copolymer, (A) inorganic powder having a volume resistivity of 10 10 Ω.cm or higher, (C) inorganic powder having a volume resistivity less than 10 10 Ω.cm, and (D) resin for film formation having a surface resistance after film formation of 10 12 Ω or higher.
Claim 20
Dependent Claim
53 words
An electrostatic recording device according to claim 17, wherein the above mixture comprises 100 parts by weight of the above component (A), 0.001 to 300 parts by weight of the component (B), 0.1 to 100 parts by weight of the component (C) and 5 to 300 parts by weight of the component (D).
Claim 21
Dependent Claim
36 words
An electrostatic recording medium, having a dielectric layer containing a resin for film formation and a fluorine-containing block copolymer comprising a polymer having a fluorine-containing monomer component block copolymerized at one end of a non-fluorine-containing polymer.
Claim 22
Dependent Claim
36 words
An electrostatic recording medium, having a dielectric layer containing a resin for film formation and a fluorine-containing block copolymer comprising a polymer having a fluorine-containing monomer component block copolymerized at one end of a non-fluorine-containing polymer.
Claim 23
Dependent Claim
28 words
An electrostatic recording medium according to claim 19, wherein said fluorine-containing block copolymer is contained in an amount of 0.1 to 50% by weight in the dielectric layer.
Claim 24
Dependent Claim
32 words
An electrostatic recording medium according to claim 19, wherein said fluorine-containing block copolymer is a block copolymer having a polymer having fluorine-containing alkyl group block-copolymerized at one end of a non-fluorine-containing polymer.
References Cited (Backward Citations)
US4081583A
Cited
US4377629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-17 | 1991-11-16 | 1992-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-17 | 1995-11-16 | 1996-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-17 | 1999-11-16 | 2000-05-17 | $7700.00 | Window Closed / Lapsed |