US3634079A - Substrate layer for dichroic photoconductors - Google Patents
Substrate layer for dichroic photoconductors Download PDFInfo
- Publication number
- US3634079A US3634079A US887360A US3634079DA US3634079A US 3634079 A US3634079 A US 3634079A US 887360 A US887360 A US 887360A US 3634079D A US3634079D A US 3634079DA US 3634079 A US3634079 A US 3634079A
- Authority
- US
- United States
- Prior art keywords
- dichroic
- polyamide
- substrate layer
- photoconductors
- electrophotographic plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000758 substrate Substances 0.000 title abstract description 8
- 239000004952 Polyamide Substances 0.000 claims abstract description 21
- 229920002647 polyamide Polymers 0.000 claims abstract description 21
- 229920003227 poly(N-vinyl carbazole) Polymers 0.000 claims description 5
- 230000011514 reflex Effects 0.000 abstract description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 15
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- VHQGURIJMFPBKS-UHFFFAOYSA-N 2,4,7-trinitrofluoren-9-one Chemical compound [O-][N+](=O)C1=CC([N+]([O-])=O)=C2C3=CC=C([N+](=O)[O-])C=C3C(=O)C2=C1 VHQGURIJMFPBKS-UHFFFAOYSA-N 0.000 description 2
- 229920012375 Elvamide® 8061 Polymers 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- -1 p-N,N- dimethylaminobenzylideneamino Chemical group 0.000 description 2
- 229920006122 polyamide resin Polymers 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- CMSGUKVDXXTJDQ-UHFFFAOYSA-N 4-(2-naphthalen-1-ylethylamino)-4-oxobutanoic acid Chemical compound C1=CC=C2C(CCNC(=O)CCC(=O)O)=CC=CC2=C1 CMSGUKVDXXTJDQ-UHFFFAOYSA-N 0.000 description 1
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- ATJXMQHAMYVHRX-CPCISQLKSA-N Ellagic acid Natural products OC1=C(O)[C@H]2OC(=O)c3cc(O)c(O)c4OC(=O)C(=C1)[C@H]2c34 ATJXMQHAMYVHRX-CPCISQLKSA-N 0.000 description 1
- QHWKHLYUUZGSCW-UHFFFAOYSA-N Tetrabromophthalic anhydride Chemical compound BrC1=C(Br)C(Br)=C2C(=O)OC(=O)C2=C1Br QHWKHLYUUZGSCW-UHFFFAOYSA-N 0.000 description 1
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 150000002735 metacrylic acids Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920006289 polycarbonate film Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- ZHFPEICFUVWJIS-UHFFFAOYSA-M sodium 2-hydroxy-5-[(3-nitrophenyl)diazenyl]benzoate Chemical compound [Na+].Oc1ccc(cc1C([O-])=O)N=Nc1cccc(c1)[N+]([O-])=O ZHFPEICFUVWJIS-UHFFFAOYSA-M 0.000 description 1
- NLDYACGHTUPAQU-UHFFFAOYSA-N tetracyanoethylene Chemical group N#CC(C#N)=C(C#N)C#N NLDYACGHTUPAQU-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 229920006345 thermoplastic polyamide Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/02—Charge-receiving layers
- G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
- G03G5/043—Photoconductive layers characterised by having two or more layers or characterised by their composite structure
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/14—Inert intermediate or cover layers for charge-receiving layers
- G03G5/142—Inert intermediate layers
Definitions
- the polarized light in striking the document is absorbed in some areas, normally the dark image areas, and depolarized and reflected in others, normally the light background areas.
- the light from the reflected areas, being depolarized contains light with an electric vector which will be absorbed by the photoconductive element and the element is thus exposed to a pattern corresponding to the pattern of the document. This renders the photoconductive element conductive and capable of transporting an electrostatic charge and, hence, permits the formation of an electrostatic charge pattern corresponding to the document.
- the preferred type of plate for use in the above-described process contains (from top to bottom):
- a charge transport layer for example one made of polyvinylcarbazole
- a semitransparent conductive base for example cellulose triacetate with a metallized surface, or a thin polycarbonate film or NESA glass.
- the substrate layer in the present invention Preferably it should give good adhesion to the conductive base and to the charge transport layer. At the same time, it must not be tacky, but should present a hard surface so that the dichroic sensitizer can be oriented on it. It should not absorb visible light, and should not be soluble in organic solvents such as benzene, chloroform, toluene, or tetrahydrofuran. In addition, it should be sufficiently conductive to allow electrophotographic decay without increasing residual potential. Numerous materials were tried and the only one found which satisfactorily met all the above requirements was polyamide.
- the polyamide have a resistivity of less than l ohm cm.
- the polyamide should have a resistivity of less than 10 ohm cm.
- the substrate polyamide layer preferably should be less than 2 microns in thickness, but, particularly with the polyamides having low resistivity, the thickness may be as great as about 5 microns.
- polyamides having low resistivity are preferred.
- the performance of a polyamide having a high resistivity may be improved by adding to it a small amount (from traces up to about 1 percent) of certain electron acceptor materials which act as sensitizers.
- These materials include, for example, alizarin yellow 06, p-chloronil, tetracyanoethylene, tetrabromophthalic anhydride, and the dyes listed in U.S. Pat. Nos. 3,037,861, 3,169,060 and 3,287,113.
- Emerez 3794 R a thermoplastic polyamide resin from Emery Industries, Inc.
- a dichroic sensitizer was oriented on the polyamide surface in a unilateral direction.
- the sensitizer was 2,6-bis(p-N,N- dimethylaminobenzylideneamino)-benzo[ l,2-d:4,5-d'] bisthiazole, which may be prepared as described in U.S. Pat. application Ser. No. 668,697, filed Sept. 18, 1967, now U.S. Pat. No. 3,598,982.
- the following formulation was coated on the polyamide/dichroic layer to a thickness of about 7 microns.
- the above coating was capable of sustaining an electrophotographic corona charge and decaying when exposed to light. Aging of this sample for 2 hours at 100 C. and percent relative humidity showed no degradation of electrophotographic properties.
- EXAMPLE II A 4 percent solution of Elvamide 8061 (an alcohol soluble polyamide resin from DuPont) in methanol was coated on aluminized polycarbonate (optical density 1.0) and cured immediately to prevent clouding at 100 C.
- the dichroic sensitizer compound from example I was oriented unilaterally on top the polyamide resin.
- EXAMPLE IV 4. An electrophotographic plate as claimed in claim I wherein the polyamide la microns.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photoreceptors In Electrophotography (AREA)
- Laminated Bodies (AREA)
Abstract
In an electrophotographic plate suitable for use in dichroic contact reflex reproduction a novel substrate layer of polyamide is inserted between the dichroic sensitizer and the conductive base.
Description
United States Patent [54] SUBSTRATE LAYER FOR DICl-IROIC PHOTOCONDUCTORS 7 Claims, No Drawings 96/].6, 96/88 51 int. c1 G03g 5/04 [50] Field of Search 96/1, 1.5, 1.6, 88; 252/501 56] References Cited UNITED STATES PATENTS 2,660,526 1 1/1953 Herrick 96/75 3,113,022 12/1963 Cassiers et a1. 96/15 3,317,317 5/1967 Clark .I: 96/1 Primary Examiner-George F. Lesmes Assistant Examiner-R. E. Martin Attorneys- Hanifin and Jancin and Joseph G. Walsh ABSTRACT: In an electrophotographic plate suitable for use in dichroic contact reflex reproduction a novel substrate layer of polyamide is inserted between the dichroic sensitizer and the conductive base.
SUBSTRATE LAYER FOR DICHROIC PHOTOCONDUCTORS FIELD OF THE INVENTION PRIOR ART The process for using dichroic photoconductors in contact reflex reproduction is described in detail in U.S. Pat. application Ser. No. 668,697, filed Sept. 18, 1967 by Herrick and Shattuck. In this process, a document is positioned adjacent a photoconductive element which exhibits photoconductive dichroism and has a preferred absorption axis, and in which the photoconductive element is uniformly exposed through the photoconductive element with polarized light whose vector, relative to the absorption axis, is such that the light is not absorbed. The polarized light in striking the document is absorbed in some areas, normally the dark image areas, and depolarized and reflected in others, normally the light background areas. The light from the reflected areas, being depolarized, contains light with an electric vector which will be absorbed by the photoconductive element and the element is thus exposed to a pattern corresponding to the pattern of the document. This renders the photoconductive element conductive and capable of transporting an electrostatic charge and, hence, permits the formation of an electrostatic charge pattern corresponding to the document.
The preferred type of plate for use in the above-described process contains (from top to bottom):
a. a charge transport layer, for example one made of polyvinylcarbazole,
b. a dichroic sensitizer, and
c. a semitransparent conductive base, for example cellulose triacetate with a metallized surface, or a thin polycarbonate film or NESA glass.
SUMMARY OF THE INVENTION According to the present invention, improved results are obtained when there is added to the above-described prior art plate a new layer, called a substrate layer. This layer separates the dichroic sensitizer and the semitransparent conductive base. It has now been discovered that improved performance is obtained when such a layer is inserted in the plate when, and only when, the layer is made of polyamide. In particular, the high humidity aging stability is vastly improved. The explanation for this unexpected result is not clearly understood.
There were many requirements which had to be met by a material before it could be used as the substrate layer in the present invention. Preferably it should give good adhesion to the conductive base and to the charge transport layer. At the same time, it must not be tacky, but should present a hard surface so that the dichroic sensitizer can be oriented on it. It should not absorb visible light, and should not be soluble in organic solvents such as benzene, chloroform, toluene, or tetrahydrofuran. In addition, it should be sufficiently conductive to allow electrophotographic decay without increasing residual potential. Numerous materials were tried and the only one found which satisfactorily met all the above requirements was polyamide.
It is preferred that the polyamide have a resistivity of less than l ohm cm. For optimum results the polyamide should have a resistivity of less than 10 ohm cm. The substrate polyamide layer preferably should be less than 2 microns in thickness, but, particularly with the polyamides having low resistivity, the thickness may be as great as about 5 microns.
As mentioned above, polyamides having low resistivity are preferred. The performance of a polyamide having a high resistivity may be improved by adding to it a small amount (from traces up to about 1 percent) of certain electron acceptor materials which act as sensitizers. These materials include, for example, alizarin yellow 06, p-chloronil, tetracyanoethylene, tetrabromophthalic anhydride, and the dyes listed in U.S. Pat. Nos. 3,037,861, 3,169,060 and 3,287,113.
PREFERRED EMBODIMENTS The general nature of the invention having been set forth, the following examples are now presented as to the specific preparation of preferred embodiments of the invention. The specific details presented are for purposes of illustration and not limitation.
EXAMPLE I A 5 percent solution of Emerez 3794 R (a thermoplastic polyamide resin from Emery Industries, Inc.) in n-propyl alcohol was coated on aluminized polycarbonate (optical density= 1.0) and cured at 100 C. for 15 minutes after air drying.
A dichroic sensitizer was oriented on the polyamide surface in a unilateral direction. The sensitizer was 2,6-bis(p-N,N- dimethylaminobenzylideneamino)-benzo[ l,2-d:4,5-d'] bisthiazole, which may be prepared as described in U.S. Pat. application Ser. No. 668,697, filed Sept. 18, 1967, now U.S. Pat. No. 3,598,982.
The following formulation was coated on the polyamide/dichroic layer to a thickness of about 7 microns.
Polyvinylcarbazole 5.0 g. (10 percent) in benzene 0.001 g. 2,4,7 trinitro-9 fluorenone Curing was for 5 minutes at 100 C.
The above coating was capable of sustaining an electrophotographic corona charge and decaying when exposed to light. Aging of this sample for 2 hours at 100 C. and percent relative humidity showed no degradation of electrophotographic properties.
EXAMPLE II A 4 percent solution of Elvamide 8061 (an alcohol soluble polyamide resin from DuPont) in methanol was coated on aluminized polycarbonate (optical density 1.0) and cured immediately to prevent clouding at 100 C.
The dichroic sensitizer compound from example I was oriented unilaterally on top the polyamide resin.
The following formulation was coated 10 1. thick over the polyamide.
55 g. 10% polyvinylcarbazole in benzene 5 g. Benzene 30 g. chloroform 10 g, Toluene 7 g. 1% Acryloid Al 1 in benzene 0.01 g. 2,4,7 trinitrofluorenone l dp. DC-ZOO-IOOO (Acryloid A-l 1 is an adhesive copolymer of esters of acrylic and metacrylic acid from Rohm and Haas. DC-200-1000 is a dimethyl siloxane lubricant from Dow Coming) The film was cured for one hour at C. and good image quality was obtained from the dichroic robot.
EXAMPLE III The process of example II was repeated, but Elvamide 8061 in ethanol instead of methanol was used. Good image quality was obtained.
EXAMPLE IV 4. An electrophotographic plate as claimed in claim I wherein the polyamide la microns.
yer has a thickness of less than 5 5. An electrophotographic plate as claimed in claim I wherein the polyamide la microns.
yer has a thickness of less than 2 6 An electrophotographic plate as claimed in claim 1 wherein the charge transport layer is polyvinylcarbazole.
7. An electrophotographic plate as claimed in claim I wherein the polyamide la sensitizer.
yer contains an electron acceptor
Claims (6)
- 2. An electrophotographic plate as claimed in claim 1 wherein the polyamide has a resistivity of less than 1014 ohm cm.
- 3. An electrophotographic plate as claimed in claim 1 wherein the polyamide has a resistivity of less than 1010 ohm cm.
- 4. An electrophotographic plate as claimed in claim 1 wherein the polyamide layer has a thickness of less than 5 microns.
- 5. An electrophotographic plate as claimed in claim 1 wherein the polyamide layer has a thickness of less than 2 microns.
- 6. An electrophotographic plate as claimed in claim 1 wherein the charge transport layer is polyvinylcarbazole.
- 7. An electrophotographic plate as claimed in claim 1 wherein the polyamide layer contains an electron acceptor sensitizer.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US88736069A | 1969-12-22 | 1969-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3634079A true US3634079A (en) | 1972-01-11 |
Family
ID=25390985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US887360A Expired - Lifetime US3634079A (en) | 1969-12-22 | 1969-12-22 | Substrate layer for dichroic photoconductors |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3634079A (en) |
| JP (1) | JPS4843826B1 (en) |
| CA (1) | CA930226A (en) |
| DE (1) | DE2063255A1 (en) |
| FR (1) | FR2071966B2 (en) |
| GB (1) | GB1272346A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3775105A (en) * | 1972-12-26 | 1973-11-27 | Ibm | Disazo pigment sensitized photoconductor |
| US3791826A (en) * | 1972-01-24 | 1974-02-12 | Ibm | Electrophotographic plate |
| US3871882A (en) * | 1972-07-31 | 1975-03-18 | Kalle Ag | Electrophotographic recording material |
| US3877935A (en) * | 1970-12-01 | 1975-04-15 | Xerox Corp | Novel xerographic plate containing photoinjecting polynuclear quinone pigments |
| US3879200A (en) * | 1970-12-01 | 1975-04-22 | Xerox Corp | Novel xerographic plate containing photoinjecting bis-benzimidazole pigments |
| US3884691A (en) * | 1972-09-21 | 1975-05-20 | Hoechst Ag | Electrophotographic element of azo dye layer and charge transport overlayer |
| US3898084A (en) * | 1971-03-30 | 1975-08-05 | Ibm | Electrophotographic processes using disazo pigments |
| US3928034A (en) * | 1970-12-01 | 1975-12-23 | Xerox Corp | Electron transport layer over an inorganic photoconductive layer |
| US4072520A (en) * | 1972-08-30 | 1978-02-07 | Hoechst Aktiengesellschaft | Electrophotographic dual layer recording material |
| US4231799A (en) * | 1972-08-30 | 1980-11-04 | Hoechst Aktiengesellschaft | Electrophotographic recording material |
| US4377629A (en) * | 1980-03-31 | 1983-03-22 | Konishiroku Photo Industry Co., Ltd. | Layered charge carrier member and method of forming image using same |
| US5017449A (en) * | 1989-01-21 | 1991-05-21 | Canon Kabushiki Kaisha | Electrophotographic photosensitive member with substituted nylon interlayer |
| US5071723A (en) * | 1989-07-13 | 1991-12-10 | Canon Kabushiki Kaisha | Electrophotographic photosensitive member with grafted polyamide interlayer |
| US5173385A (en) * | 1990-05-28 | 1992-12-22 | Mitsubishi Kasei Corporation | Photosensitive member for electrophotography with copolyamide interlayer |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50151078U (en) * | 1974-05-30 | 1975-12-16 | ||
| JP2807459B2 (en) * | 1987-11-02 | 1998-10-08 | 日立化成工業 株式会社 | Electrophotographic photoreceptor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2660526A (en) * | 1949-01-03 | 1953-11-24 | Gen Aniline & Film Corp | Diazotype reflex photoprinting |
| US3113022A (en) * | 1959-02-26 | 1963-12-03 | Gevaert Photo Prod Nv | Electrophotographic process |
| US3317317A (en) * | 1963-01-02 | 1967-05-02 | Xerox Corp | Xerographic method of making a particle transparency projectable image |
-
1969
- 1969-12-22 US US887360A patent/US3634079A/en not_active Expired - Lifetime
-
1970
- 1970-10-27 FR FR707040281A patent/FR2071966B2/fr not_active Expired
- 1970-11-13 GB GB54025/70A patent/GB1272346A/en not_active Expired
- 1970-11-19 JP JP45101566A patent/JPS4843826B1/ja active Pending
- 1970-12-01 CA CA099514A patent/CA930226A/en not_active Expired
- 1970-12-22 DE DE19702063255 patent/DE2063255A1/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2660526A (en) * | 1949-01-03 | 1953-11-24 | Gen Aniline & Film Corp | Diazotype reflex photoprinting |
| US3113022A (en) * | 1959-02-26 | 1963-12-03 | Gevaert Photo Prod Nv | Electrophotographic process |
| US3317317A (en) * | 1963-01-02 | 1967-05-02 | Xerox Corp | Xerographic method of making a particle transparency projectable image |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3877935A (en) * | 1970-12-01 | 1975-04-15 | Xerox Corp | Novel xerographic plate containing photoinjecting polynuclear quinone pigments |
| US3928034A (en) * | 1970-12-01 | 1975-12-23 | Xerox Corp | Electron transport layer over an inorganic photoconductive layer |
| US3879200A (en) * | 1970-12-01 | 1975-04-22 | Xerox Corp | Novel xerographic plate containing photoinjecting bis-benzimidazole pigments |
| US3898084A (en) * | 1971-03-30 | 1975-08-05 | Ibm | Electrophotographic processes using disazo pigments |
| US3791826A (en) * | 1972-01-24 | 1974-02-12 | Ibm | Electrophotographic plate |
| US3871882A (en) * | 1972-07-31 | 1975-03-18 | Kalle Ag | Electrophotographic recording material |
| US4072520A (en) * | 1972-08-30 | 1978-02-07 | Hoechst Aktiengesellschaft | Electrophotographic dual layer recording material |
| US4231799A (en) * | 1972-08-30 | 1980-11-04 | Hoechst Aktiengesellschaft | Electrophotographic recording material |
| US3884691A (en) * | 1972-09-21 | 1975-05-20 | Hoechst Ag | Electrophotographic element of azo dye layer and charge transport overlayer |
| US3775105A (en) * | 1972-12-26 | 1973-11-27 | Ibm | Disazo pigment sensitized photoconductor |
| US4377629A (en) * | 1980-03-31 | 1983-03-22 | Konishiroku Photo Industry Co., Ltd. | Layered charge carrier member and method of forming image using same |
| US5017449A (en) * | 1989-01-21 | 1991-05-21 | Canon Kabushiki Kaisha | Electrophotographic photosensitive member with substituted nylon interlayer |
| US5071723A (en) * | 1989-07-13 | 1991-12-10 | Canon Kabushiki Kaisha | Electrophotographic photosensitive member with grafted polyamide interlayer |
| US5173385A (en) * | 1990-05-28 | 1992-12-22 | Mitsubishi Kasei Corporation | Photosensitive member for electrophotography with copolyamide interlayer |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2071966B2 (en) | 1973-02-02 |
| JPS4843826B1 (en) | 1973-12-20 |
| GB1272346A (en) | 1972-04-26 |
| CA930226A (en) | 1973-07-17 |
| DE2063255A1 (en) | 1971-06-24 |
| FR2071966A2 (en) | 1971-09-24 |
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