US3877935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel xerographic plate containing photoinjecting polynuclear quinone pigments
Assignee: Xerox Corp
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Filing: 1972-09-27
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Granted: 1975-04-15
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Expires: 1992-09-27
Abstract
Abstract An electrophotographic plate having a photoreceptor comprising a photoinjecting pigment selected from the class of polynuclear quinone pigments and an active transport material which is substantially transparent in the wavelength region of xerographic use and capable of supporting charge carrier injection from the pigment. The photoinjecting polynuclear quinone pigments have the property of being efficient both in photogeneration of charge carriers and subsequent injection of the charge carriers into hole and electron active transport materials. The photoinjecting pigment and active transport material system may be used in a binder or layer type photoreceptor. The structure may be imaged in the conventional xerographic mode which usually includes charging, exposure to light, and development.
Inventors
- 👤 Paul J Regensburger
- 👤 James J Jakubowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:09
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0644; G03G5/0646; G03G5/0653; G03G5/0601; G03G5/0609
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
148 words
AN ELECTROPHOTAGRAPHIC PLATE HAVING A PHOTOECEPTOR BINDER LAYER CONSISTING ESSENTIALLY OF PHOTOCONDUCTIVE PARTICLES DISPERSED IN AN ACTIVE TRANSPORT BINDER IN AN UNORIENTED FASHION IN AN AMOUNT OF FROM ABOUT 0.1 TO 5 PERCENT BY VOLUME OF SAID BINDER, SAID BINDER AND PARTICLES BEING COMPATIBLE SO AS TO SUPPORT EFFICIENT PHOTOGENERATED CHARGED INJECTION FROM SAID PHOTOCONDUCTIVE PARTICLES, SAID PHOTOCONDUCTIVE PARTICLES COMPRISING A PIGMENT SELECTED FROM ANTHANTHRONE, DIBENZPYRENEQUINONE, BROMINATED DIBENZPYRENEQUINONE, BROMINATED PYRANTHRONE, AND FLAVANTHRONE, AND SAID ACTIVE TRANSPORT BINDER CONSISTING ESSENTIALLY OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ELECTRON TRANSPORT AND HOLE TRANSPORT MATERIALS, SAID BINDER MATERIAL BEING CAPABLE OF SUPPORTING THE INJECTION AND TRANSPORT OF PHOTOGENERATED CHARGES FROM SAID PHOTOCONDUCTIVE PARTICLES THROUGH SAID BINDER MATERIAL AND BEING SUBSTANTIALLY TRANSPARENT IN THE WAVELENGTH REGION OF FROM ABOUT 4000 TO 6000 ANGSTROM UNITS, AND WHEREIN SAID ACTIVE TRANSPORT BINDER HAS A THICKNESS OF FROM ABOUT 5 TO 100 MICRONS.
Claim 2
Dependent Claim
148 words
AN ELECTROPHOTAGRAPHIC PLATE HAVING A PHOTOECEPTOR BINDER LAYER CONSISTING ESSENTIALLY OF PHOTOCONDUCTIVE PARTICLES DISPERSED IN AN ACTIVE TRANSPORT BINDER IN AN UNORIENTED FASHION IN AN AMOUNT OF FROM ABOUT 0.1 TO 5 PERCENT BY VOLUME OF SAID BINDER, SAID BINDER AND PARTICLES BEING COMPATIBLE SO AS TO SUPPORT EFFICIENT PHOTOGENERATED CHARGED INJECTION FROM SAID PHOTOCONDUCTIVE PARTICLES, SAID PHOTOCONDUCTIVE PARTICLES COMPRISING A PIGMENT SELECTED FROM ANTHANTHRONE, DIBENZPYRENEQUINONE, BROMINATED DIBENZPYRENEQUINONE, BROMINATED PYRANTHRONE, AND FLAVANTHRONE, AND SAID ACTIVE TRANSPORT BINDER CONSISTING ESSENTIALLY OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ELECTRON TRANSPORT AND HOLE TRANSPORT MATERIALS, SAID BINDER MATERIAL BEING CAPABLE OF SUPPORTING THE INJECTION AND TRANSPORT OF PHOTOGENERATED CHARGES FROM SAID PHOTOCONDUCTIVE PARTICLES THROUGH SAID BINDER MATERIAL AND BEING SUBSTANTIALLY TRANSPARENT IN THE WAVELENGTH REGION OF FROM ABOUT 4000 TO 6000 ANGSTROM UNITS, AND WHEREIN SAID ACTIVE TRANSPORT BINDER HAS A THICKNESS OF FROM ABOUT 5 TO 100 MICRONS.
Claim 3
Dependent Claim
59 words
The electrophotographic plate of claim 1 in which the active transport material is selected from the group of hole transport materials consisting of carbazole, N-ethylcarbazole, N-isopropyl carbazole, N-phenylcarbazole, tetraphenylpyrene, 1-methylpyrene, perylene, chrysene, fluorene, fluorenone, anthracene, tetracene, tetraphene, 2-phenylnaphthalene azapyrene, 1-ethylpyrene, acetyl pyrene, 2,3-benzochrysene, 2,4-benzopyrene, 1,4-bromopyrene and phenyl indole, polyvinyl carbazole, polyvinyl pyrene, polyvinyl tetracene, polyvinyl perylene, and polyvinyl tetraphene.
Claim 4
Dependent Claim
33 words
The electrophotographic plate of claim 1 in which the active transport material is selected from the group of electron transport substances consisting of 2,4,7-trinitro-9-fluorenone, 2,4,5,7-tetranitrofluorenone, dinitroanthracene, dinitroacridene, tetracyanopyrene, dinitroanthraquinone, and polymeric materials thereof.
Claim 5
Dependent Claim
12 words
The electrophotographic plate of claim 1 in which the pigment is anthanthrone.
Claim 6
Dependent Claim
12 words
The electrophotographic plate of claim 1 in which the pigment is dibenzpyrenequinone.
Claim 7
Dependent Claim
13 words
The electrophotographic plate of claim 1 in which the pigment is brominated dibenzpyrenequinone.
Claim 8
Dependent Claim
13 words
The electrophotographic plate of claim 1 in which the pigment is brominated pyranthrone.
Claim 9
Dependent Claim
12 words
The electrophographic plate of claim 1 in which the pigment is flavanthrone.
Claim 10
Dependent Claim
176 words
An electrophotographic plate having at least two adjacent layers said layers consist essentially of an unoriented photoconductive layer overlaying a substrate member with a layer of an active transport material overlaying said photoconductive layer, both of said layers being compatible so as to support efficient photogenerated charge injection from saaid photoconductive layer, said photoconductive layer comprising a photoinjecting pigment selected from anthanthrone, dibenzpyrenequinone, brominated dibenzprenequinone, brominated pyranthrone and flavanthrone, and said active transport material consisting essentially of a material selected from the group consisting of electron transport and hole transport materials, said material being capable of supporting the injection and transport of photogenerated charges from said photoconductive material through said material and being substantially transparent in the wavelength region of from about 4000 to 6000 Angs. Units. and wherein said active transport layer has a thickness of from about 5 to 100 microns, said photoconductor layer has a thickness of from 0.05 to 20 microns, and the ratio of the thickness of the active transport layer to the photoconductor layer is from about 2:1 to 200:1.
Claim 11
Dependent Claim
176 words
An electrophotographic plate having at least two adjacent layers said layers consist essentially of an unoriented photoconductive layer overlaying a substrate member with a layer of an active transport material overlaying said photoconductive layer, both of said layers being compatible so as to support efficient photogenerated charge injection from saaid photoconductive layer, said photoconductive layer comprising a photoinjecting pigment selected from anthanthrone, dibenzpyrenequinone, brominated dibenzprenequinone, brominated pyranthrone and flavanthrone, and said active transport material consisting essentially of a material selected from the group consisting of electron transport and hole transport materials, said material being capable of supporting the injection and transport of photogenerated charges from said photoconductive material through said material and being substantially transparent in the wavelength region of from about 4000 to 6000 Angs. Units. and wherein said active transport layer has a thickness of from about 5 to 100 microns, said photoconductor layer has a thickness of from 0.05 to 20 microns, and the ratio of the thickness of the active transport layer to the photoconductor layer is from about 2:1 to 200:1.
Claim 12
Dependent Claim
59 words
The electrophotographic plate of claim 9 in which the active transport material is selected from the group of hole transport materials consisting of carbazole, N-ethylcarbazole, N-isopropyl carbazole, N-phenylcarbazole, tetraphenylpyrene, 1-methylpyrene, perylene, chrysene, fluorene, fluroenone, anthracene, tetracene, tetraphene, 2-phenylnaphthalene, azapyrene, 1-ethylpyrene, acetyl pyrene, 2,3-benzochrysene, 2,4-benzopyrene, 1,4-bromopyrene and phenyl indole, polyvinyl carbazole, polyvinyl pyrene, polyvinyl tetracene, polyvinyl perylene, and polyvinyl tetraphene.
Claim 13
Dependent Claim
32 words
The electrophotographic plate of claim 9 in which the active transport material is selected from the group of electron-transport substances consisting of 2,4,7-trinitro-9-fluorenone, 2,4,5,7-tetranitrofluorenone, dinitroanthracene, dinitroacridene, tetracyanopyrene, dinitroanthraquinone, and polymeric materials thereof.
Claim 14
Dependent Claim
12 words
The electrophotographic plate of claim 9 in which the pigment is anthanthrone.
Claim 15
Dependent Claim
12 words
The electrophotographic plate of claim 9 in which the pigment is dibenzpyrenequinone.
Claim 16
Dependent Claim
27 words
The electrophotographic plate of claim 9 in which the pigment is brominated dibenzpyrenequinone. 15. The electrophotographic plate of claim 9 in which the pigment is brominated pyranthrone.
Claim 17
Dependent Claim
12 words
The electrophotographic plate of claim 9 in which the pigment is flavanthrone.
Claim 18
Independent Claim
195 words
A method of imaging which comprises: a. providing an electrophotographic plate having a photoreceptor binder layer consisting essentially of photoconductive particles dispersed in an active transport binder in an unoriented fashion in an amount from about 0.1 to 5 percent by volume of said binder, said binder and particles being compatible so as to support efficient photogenerated charge injection from said photoconductive particles, said photoconductive particles comprising a pigment selected from anthanthrone, dibenzpyrenequinone, brominated dibenzypyrenequinone, brominated pyranthrone, and flavanthrone, and said active transport binder material consisting essentially of a material which is capable of supporting the injection and transport of photogenerated charges from said photoconductive particles through said binder material which is substantially transparent in the wavelength region of from about 4200 to 6500 Angs., and wherein said active transport binder has a thickness of from about 5 to 100 microns, b. uniformly charging said plate, and c. exposing said plate to a source of radiation in the wavelength region of from about 4200 to 6500 Angs. whereby injection and transport of photogenerated charges from said photoconductive particles occurs through said active transport binder to form an electrostatic image on the surface of said plate.
Claim 19
Independent Claim
195 words
A method of imaging which comprises: a. providing an electrophotographic plate having a photoreceptor binder layer consisting essentially of photoconductive particles dispersed in an active transport binder in an unoriented fashion in an amount from about 0.1 to 5 percent by volume of said binder, said binder and particles being compatible so as to support efficient photogenerated charge injection from said photoconductive particles, said photoconductive particles comprising a pigment selected from anthanthrone, dibenzpyrenequinone, brominated dibenzypyrenequinone, brominated pyranthrone, and flavanthrone, and said active transport binder material consisting essentially of a material which is capable of supporting the injection and transport of photogenerated charges from said photoconductive particles through said binder material which is substantially transparent in the wavelength region of from about 4200 to 6500 Angs., and wherein said active transport binder has a thickness of from about 5 to 100 microns, b. uniformly charging said plate, and c. exposing said plate to a source of radiation in the wavelength region of from about 4200 to 6500 Angs. whereby injection and transport of photogenerated charges from said photoconductive particles occurs through said active transport binder to form an electrostatic image on the surface of said plate.
Claim 20
Dependent Claim
16 words
The method of claim 17 which further includes developing said latent image to make it visible.
Claim 21
Dependent Claim
20 words
The method of claim 17 in which the substrate is substantially transparent and exposure is carried out through said substrate.
Claim 22
Independent Claim
225 words
A method of imaging which comprises: a. providing an electrophotographic plate having at least two adjacent layers, said layers consisting essentially of an unoriented photoconductive layer overlaying a substrate member with a layer of an active transport material overlaying said photoconductive layer, both of said layers being compatible so as to support efficient photogenerated charge injection from said photoconductive layer, said photoconductive layer comprising a photoinjecting pigment selected from anthanthrone, dibenzpyrenequinone, brominated dibenzypyrenequinone, brominated pyranthrone, and flavanthrone, and said active transport layer consisting essentially of a material which is capable of supporting the injection and transport of photogenerated charges from said photoconductive layer through said transport layer which is substantially transparent in the wavelength region of from about 4200 to 6,500 Angs., and wherein said active transport layer hhas a thickness of from about 5 to 100 microns, said photoconductor layer has a thickness of from 0.05 to 20 microns and the ratio of the thickness of the active transport layer to the photoconductor layer is from about 2:1 to 200:1, b. uniformly charging said plate, and c. exposing said plate to a source of radiation in the wavelength region of from about 4200 to 6500 Angs. whereby injection and transport of photogenerated charges from said photoconductive layer occurs through said active transport layer to form an electrostatic image on the surface of said plate.
Claim 23
Independent Claim
225 words
A method of imaging which comprises: a. providing an electrophotographic plate having at least two adjacent layers, said layers consisting essentially of an unoriented photoconductive layer overlaying a substrate member with a layer of an active transport material overlaying said photoconductive layer, both of said layers being compatible so as to support efficient photogenerated charge injection from said photoconductive layer, said photoconductive layer comprising a photoinjecting pigment selected from anthanthrone, dibenzpyrenequinone, brominated dibenzypyrenequinone, brominated pyranthrone, and flavanthrone, and said active transport layer consisting essentially of a material which is capable of supporting the injection and transport of photogenerated charges from said photoconductive layer through said transport layer which is substantially transparent in the wavelength region of from about 4200 to 6,500 Angs., and wherein said active transport layer hhas a thickness of from about 5 to 100 microns, said photoconductor layer has a thickness of from 0.05 to 20 microns and the ratio of the thickness of the active transport layer to the photoconductor layer is from about 2:1 to 200:1, b. uniformly charging said plate, and c. exposing said plate to a source of radiation in the wavelength region of from about 4200 to 6500 Angs. whereby injection and transport of photogenerated charges from said photoconductive layer occurs through said active transport layer to form an electrostatic image on the surface of said plate.
Claim 24
Dependent Claim
16 words
The method of claim 20 which further includes developing said latent image to make it visible.
Claim 25
Dependent Claim
20 words
The method of claim 20 in which the substrate is substantially transparent and exposure is carried out through said substrate.
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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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |