US4579801A
Expired / Lapsed
US
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Electrophotographic photosensitive member having phenolic subbing layer
Assignee: Canon Inc
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Filing: 1984-07-25
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Granted: 1986-04-01
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Expires: 2004-07-25
Abstract
Abstract An electrophotographic photosensitive member characterized by having a phenolic resin layer formed from a resol coat, between a substrate and a photosensitive layer.
Inventors
- 👤 Yuichi Yashiki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:02
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; G03G5/144
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
23 words
An electrophotographic photosensitive member characterized by having a phenolic resin layer formed from a resol coat, between a substrate and a photosensitive layer.
Claim 2
Dependent Claim
23 words
An electrophotographic photosensitive member characterized by having a phenolic resin layer formed from a resol coat, between a substrate and a photosensitive layer.
Claim 3
Dependent Claim
23 words
The electrophotographic photosensitive member of claim 1, wherein the phenolic resin layer formed from a resol coat contains a dispersed electrically conductive material.
Claim 4
Dependent Claim
47 words
The electrophotographic photosensitive member of claim 2, wherein the electrically conductive material is a powder of at least one selected from the group consisting of nickel, copper, silver, aluminum, carbon, barium carbonate, barium sulfate, iron oxide, titanium oxide, tin oxide, antimony oxide, aluminum oxide, and indium oxide.
Claim 5
Dependent Claim
25 words
The electrophotographic photosensitive member of claim 2, wherein the electrically conductive material is a titanium oxide powder having an aluminum oxide coat around the particle.
Claim 6
Dependent Claim
24 words
The electrophotographic photosensitive member of claim 2, wherein the conductive material is a titanium oxide powder having a tin oxide coat around the particle.
Claim 7
Dependent Claim
15 words
The electrophotographic photosensitive member of claim 3, wherein the titanium oxide is of rutile type.
Claim 8
Dependent Claim
53 words
The electrophotographic photosensitive member of claim 1, wherein the resol is the product of the reaction of a phenol selected from the group consisting of m-cresol, o-cresol, p-cresol, 3,5-xylenol, 2,5-xylenol, 2,4-xylenol, and phenol with an aldehyde selected from the group consisting of formaldehyde, furfural, and acetaldehyde, in the presence of an alkali catalyst.
Claim 9
Dependent Claim
12 words
The electrophotographic photosensitive member of claim 7, wherein the aldehyde is formaldehyde.
Claim 10
Dependent Claim
28 words
An electrophotographic photosensitive member characterized by having a phenolic resin layer formed from a resol coat and a polyamide resin layer between a substrate and a photosensitive layer.
Claim 11
Dependent Claim
28 words
An electrophotographic photosensitive member characterized by having a phenolic resin layer formed from a resol coat and a polyamide resin layer between a substrate and a photosensitive layer.
Claim 12
Dependent Claim
23 words
The electrophotographic photosensitive member of claim 9, wherein the phenolic resin layer formed from a resol coat contains a dispersed electrically conductive material.
Claim 13
Dependent Claim
45 words
The electrophotographic photosensitive member of claim 10, wherein the electrically conductive material is a powder of at least one selected from the group consisting of nickel, copper, silver, aluminum, carbon, barium carbonate, barium sulfate, iron oxide, tin oxide, antimony oxide, aluminum oxide, and indium oxide.
Claim 14
Dependent Claim
25 words
The electrophotographic photosensitive member of claim 10, wherein the electrically conductive material is a titanium oxide powder having an aluminum oxide coat around the particle.
Claim 15
Dependent Claim
25 words
The electrophotographic photosensitive member of claim 10, wherein the electrically conductive material is a titanium oxide powder having a tin oxide coat around the particle.
Claim 16
Dependent Claim
15 words
The electrophotographic photosensitive member of claim 12, wherein the titanium oxide is of rutile type.
Claim 17
Dependent Claim
53 words
The electrophotographic photosensitive member of claim 9, wherein the resol is the product of the reaction of a phenol selected from the group consisting of m-cresol, o-cresol, p-cresol, 3,5-xylenol, 2,5-xylenol, 2,4-xylenol, and phenol with an aldehyde selected from the group consisting of formaldehyde, furfural, and acetaldehyde, in the presence of an alkali catalyst.
Claim 18
Dependent Claim
12 words
The electrophotographic photosensitive member of claim 15, wherein the aldehyde is formaldehyde.
Claim 19
Dependent Claim
16 words
The electrophotographic photosensitive member of claim 9, wherein the polyamide resin layer comprises a copolymerized polyamide.
Claim 20
Dependent Claim
59 words
An electrophotographic photosensitive member prepared in a process comprising the steps of coating a substrate with a solution of resol in an ethylene glycol ether and/or an ethylene glycol ester, hardening the resol to form a phenolic resin layer, and overlaying the phenolic resin layer with a photosensitive layer or with a polyamide resin layer and a photosensitive layer.
Claim 21
Dependent Claim
59 words
An electrophotographic photosensitive member prepared in a process comprising the steps of coating a substrate with a solution of resol in an ethylene glycol ether and/or an ethylene glycol ester, hardening the resol to form a phenolic resin layer, and overlaying the phenolic resin layer with a photosensitive layer or with a polyamide resin layer and a photosensitive layer.
Claim 22
Dependent Claim
28 words
The electrophotographic photosensitive member of claim 18, wherein the solution of resol in an ethylene glycol ether and/or an ethylene glycol ester contains a dispersed electrically conductive material.
Claim 23
Dependent Claim
31 words
The electrophotographic photosensitive member of claim 19, wherein the electrically conductive material is at least one metal oxide selected from the group consisting of titanium oxide, tin oxide, and aluminum oxide.
Claim 24
Dependent Claim
25 words
The electrophotographic photosensitive member of claim 19, wherein the electrically conductive material is a titanium oxide powder having an aluminum oxide coat around the particle.
Claim 25
Dependent Claim
24 words
The electrophotographic photosensitive member of claim 19, wherein the conductive material is a titanium oxide powder having a tin oxide coat around the particle.
Claim 26
Dependent Claim
15 words
The electrophotographic photosensitive member of claim 20, wherein the titanium oxide is of rutile type.
Claim 27
Dependent Claim
50 words
The electrophotographic photosensitive member of claim 18, wherein the resol is produced by reacting a phenol selected from the group consisting of m-cresol, o-cresol, p-cresol, 3,5-xylenol, 2,5-xylenol, 2,4-xylenol, and phenol with an aldehyde selected from the group consisting of formaldehyde, furfural, and acetaldehyde, in the presence of an alkali catalyst.
Claim 28
Dependent Claim
12 words
The electrophotographic photosensitive member of claim 24, wherein the aldehyde is formaldehyde.
Claim 29
Dependent Claim
16 words
The electrophotographic photosensitive member of claim 18, wherein the polyamide resin layer comprises a copolymerized polyamide.
Claim 30
Dependent Claim
22 words
The electrophotographic photosensitive member of claim 18, wherein the ethylene glycol ether is 2-methoxyethyl alcohol, 2-ethoxyethyl alcohol, or ethylene glycol dimethyl ether.
Claim 31
Dependent Claim
20 words
The electrophotographic photosensitive member of claim 18, wherein the ethylene glycol ester is methyl Cellosolve acetate or ethyl Cellosolve acetate.
Claim 32
Dependent Claim
45 words
An electrophotographic photosensitive member characterized by having on an electrically conductive substrate a resin layer in which a titanium oxide power coated with a mixture of antimony oxide and tin oxide is dispersed as the main component and a photosensitive layer overlying the resin layer.
Claim 33
Dependent Claim
45 words
An electrophotographic photosensitive member characterized by having on an electrically conductive substrate a resin layer in which a titanium oxide power coated with a mixture of antimony oxide and tin oxide is dispersed as the main component and a photosensitive layer overlying the resin layer.
Claim 34
Dependent Claim
14 words
The electrophotographic photosensitive member of claim 29, wherein the resin is a phenolic resin.
Claim 35
Dependent Claim
16 words
The electrophotographic photosensitive member of claim 30, wherein the phenolic resin is formed by hardening resol.
Claim 36
Dependent Claim
32 words
The electrophotographic photosensitive member of claim 29, wherein the content of antimony oxide in the coating mixture around the titanium oxide particles is in the range of 1 to 20% by weight.
Claim 37
Dependent Claim
21 words
The electrophotographic photosensitive member of claim 29, wherein the volume resistivity of the resin layer is up to 10 13 Ωcm.
Claim 38
Dependent Claim
21 words
The electrophotographic photosensitive member of claim 29, wherein the volume resistivity of the resin layer is up to 10 12 Ωcm.
Claim 39
Dependent Claim
32 words
The electrophotographic photosensitive member of claim 29, wherein the resin layer contains at least 30% by volume of a titanium oxide powder coated with a mixture of antimony oxide and tin oxide.
Claim 40
Dependent Claim
32 words
The electrophotographic photosensitive member of claim 29, wherein the resin layer contains at least 60% by weight of a titanium oxide powder coated with a mixture of antimony oxide and tin oxide.
Claim 41
Dependent Claim
48 words
An electrophotographic photosensitive member characterized by having (1) a phenolic resin layer formed by hardening a resol coat which contains mainly a titanium oxide powder coated with a mixture of antimony oxide and tin oxide and (2) a polyamide resin layer, between a substrate and a photosensitive layer.
Claim 42
Dependent Claim
48 words
An electrophotographic photosensitive member characterized by having (1) a phenolic resin layer formed by hardening a resol coat which contains mainly a titanium oxide powder coated with a mixture of antimony oxide and tin oxide and (2) a polyamide resin layer, between a substrate and a photosensitive layer.
Claim 43
Dependent Claim
15 words
The electrophotographic photosensitive member of claim 37, wherein the polyamide resin is a copolymerized polyamide.
Claim 44
Dependent Claim
18 words
The electrophotographic photosensitive member of claim 37, wherein the phenolic resin layer is in contact with the substrate.
Claim 45
Dependent Claim
25 words
The electrophotographic photosensitive member of claim 37, wherein the photosensitive layer is a laminate consisting of a charge generation layer and a charge transport layer.
Claim 46
Dependent Claim
29 words
The electrophotographic photosensitive member of claim 40, wherein the substrate is overlaid in series with a phenolic resin layer, polyamide resin layer, charge generation layer, and charge transport layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |