Patent US4599288A successfully refreshed from Google Patents.
US4599288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic plate-making material
Assignee: Fujifilm Holdings Corp
•
Filing: 1984-03-19
•
Granted: 1986-07-08
•
Expires: 2004-03-19
Abstract
Abstract An electrophotographic plate-making material comprising a support with a volume resistance of 10 10 Ω or less which support comprises at least one resin layer hardened by electron beam irradiation and a base paper, which support has a photoconductive layer on the resin layer.
Inventors
- 👤 Tetsuro Fuchizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:21
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; G03G5/10; G03G5/101; Y; Y10; Y10S; Y10S430/00; Y10S430/143
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
173 words
An electrophotographic plate making material, comprising: a support with a volume resistance of 10 10 Ω or less which support comprises at least one resin overlayer prepared from a compound or a composition containing at least one compound with at least one unsaturated bond polymerizable by electron beam irradiation which has a thickness in the range of 5-50μ and is hardened and polymerized by electron beam irradiation with an electron beam with an acceleration voltage in the range of 100-1,000 KV and an absorption dose in the range of 0.5 to 20 megarads and a base paper, which resin layer contains electrically conductive substances selected from the group consisting of oxides of metals selected from zinc, magnesium, tin, barium, indium, molybdenum, aluminum, titanium, silicon, fine particles of crystalline oxide or complex oxides, or carbon black in an amount in the range of 5-30 wt% based on the weight of the compound or composition to be hardened and polymerized by electron beam irradiation, and wherein a photoconductive layer is present on the resin layer.
Claim 2
Dependent Claim
173 words
An electrophotographic plate making material, comprising: a support with a volume resistance of 10 10 Ω or less which support comprises at least one resin overlayer prepared from a compound or a composition containing at least one compound with at least one unsaturated bond polymerizable by electron beam irradiation which has a thickness in the range of 5-50μ and is hardened and polymerized by electron beam irradiation with an electron beam with an acceleration voltage in the range of 100-1,000 KV and an absorption dose in the range of 0.5 to 20 megarads and a base paper, which resin layer contains electrically conductive substances selected from the group consisting of oxides of metals selected from zinc, magnesium, tin, barium, indium, molybdenum, aluminum, titanium, silicon, fine particles of crystalline oxide or complex oxides, or carbon black in an amount in the range of 5-30 wt% based on the weight of the compound or composition to be hardened and polymerized by electron beam irradiation, and wherein a photoconductive layer is present on the resin layer.
Claim 3
Dependent Claim
25 words
An electrophotographic plate-making material as claimed in claim 1, wherein the compound is a compound having at least one vinyl or vinylidene carbon-carbon double bond.
Claim 4
Dependent Claim
44 words
An electrophotographic plate-making material as claimed in claim 1, wherein the compound is a compound containing at least one group selected from the groups consisting of an acryloyl group, acrylamide group, allyl group, vinyl ether group, vinyl thioether group or an unsaturated polyester compound.
Claim 5
Dependent Claim
32 words
An electrophotographic plate-making material as claimed in claim 1, wherein the compound is a polymer or oligomer having acryloyl group, methacryloyl group or both of them at one end or both ends.
Claim 6
Dependent Claim
22 words
An electrophotographic plate-making material as claimed in claim 1, wherein the volume resistance of the support is 10 8 Ω or less.
Claim 7
Dependent Claim
34 words
An electrophotographic plate-making material as claimed in claim 1, wherein an intermediate layer containing a colloidal silica, a colloidal alumina or both of them is present between the resin layer and the photoconductive layer.
Claim 8
Dependent Claim
44 words
An electrophotographic plate-making material as claimed in claim 1, wherein said resin layer is prepared from at least one monomer selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, acrylate, methacrylate, styrene, acrylonitrile, methacrylonitrile, acrylamide, methacrylamide, vinyl acetate and vinyl propionate.
Claim 9
Dependent Claim
33 words
An electrophotographic plate-making material as claimed in claim 1, wherein the photoconductive layer comprises a photoconductive material and a binder, the photoconductive material being an inorganic photoconductive material or an organic photoconductive material.
Claim 10
Dependent Claim
21 words
An electrophotographic plate-making material as claimed in claim 1, wherein said resin layer has a thickness in the range of 10-30μ.
Claim 11
Dependent Claim
22 words
An electrophotographic plate-making material as claimed in claim 2, wherein said compound has at least two vinyl or vinylidene carbon-carbon double bonds.
Claim 12
Dependent Claim
25 words
An electrophotographic plate-making material as claimed in claim 10, wherein the compound is a compound having 2 to 4 vinyl or vinylidene carbon-carbon double bonds.
Claim 13
Dependent Claim
66 words
An electrophotographic plate-making material as claimed in claim 4, wherein the resin layer is prepared from at least one monomer selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, acrylate, methacrylate, styrene, acrylonitrile, methacrylonitrile, acrylamide, methacrylamide, vinyl acetate, and vinyl propionate added in an amount of 80% by weight or less based on the total amount of polymer and/or oligomer and the monomer.
Claim 14
Dependent Claim
20 words
An electrophotographic plate-making material as claimed in claim 1, wherein said acceleration voltage is in the range of 100-300 KV.
Claim 15
Dependent Claim
17 words
An electrophotographic plate-making material as claimed in claim 1, wherein the absorption dose ranges from 2-10 megarads.
Claim 16
Dependent Claim
34 words
An electrophotographic plate-making material as claimed in claim 1, wherein said photoconductive layer is formed on said support and comprises a photoconductive substance and a binder at a weight ratio of 3:1 to 20:1.
Claim 17
Dependent Claim
22 words
An electrophotographic plate-making material as claimed in claim 1, wherein the thickness of said photoconductive layer is in the range of 5-30μ.
Claim 18
Dependent Claim
28 words
An electrophotographic plate-making material as claimed in claim 6, wherein the coating amount of the intermediate layer is in the range of 0.01 to 10 g/m 2 .
References Cited (Backward Citations)
BE757393A
Cited
US4011080A
Cited
US4014695A
Cited
US4148639A
Cited
US4416963A
Cited
US4456670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-07 | 1990-01-06 | 1990-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-07 | 1994-01-06 | 1994-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-07 | 1998-01-06 | 1998-07-08 | $7700.00 | Window Closed / Lapsed |