US4410616A
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US
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Multi-layered ambipolar photoresponsive devices for electrophotography
Assignee: Xerox Corp
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Filing: 1982-05-10
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Granted: 1983-10-18
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Expires: 2002-05-10
Abstract
Abstract This invention is directed to an improved ambipolar photoresponsive device useful in imaging systems for the production of positive images, from either positive or negative originals, which device is comprised of: (a) supporting substrate, (b) a first photogenerating layer, (c) a charge transport layer, and (d) a second photogenerating layer, wherein the charge transport layer is comprised of a highly insulating organic resin having dissolved therein small molecules of an electrically active material of the formula: ##STR1## wherein X is selected from the group consisting of alkyl and hal
Inventors
- 👤 Clifford H. Griffiths
- 👤 Andrew R. Melnyk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:15
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/043; G03G5/047; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/102; Y10S430/146
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
82 words
An improved ambipolar photoresponsive device useful in imaging systems for the production of positive images from either positive or negative originals, comprised of: (a) a supporting substrate, (b) a first photogenerating layer, (c) a charge transport layer, and (d) a second photogenerating layer, wherein the charge transport layer is comprised of a highly insulating organic resin having dissolved therein small molecules of an electrically active material of the formula: ##STR3## wherein X is selected from the group consisting of alkyl and halogen.
Claim 2
Dependent Claim
82 words
An improved ambipolar photoresponsive device useful in imaging systems for the production of positive images from either positive or negative originals, comprised of: (a) a supporting substrate, (b) a first photogenerating layer, (c) a charge transport layer, and (d) a second photogenerating layer, wherein the charge transport layer is comprised of a highly insulating organic resin having dissolved therein small molecules of an electrically active material of the formula: ##STR3## wherein X is selected from the group consisting of alkyl and halogen.
Claim 3
Dependent Claim
31 words
An improved photoresponsive device in accordance with claim 1 wherein X is ortho (CH 3 ), meta (CH 3 ), para (CH 3 ), ortho (Cl), meta (Cl), or para (Cl),
Claim 4
Dependent Claim
57 words
An improved photoresponsive device in accordance with claim 1 wherein the first photogenerating layer ranges in thickness of from about 0.05 microns to about 10 microns, the second photogenerating layer ranges in thickness of from about 0.05 microns to about 2 microns, and the transport layer ranges in thickness of from about 5 to about 30 microns.
Claim 5
Dependent Claim
32 words
An improved photoresponsive device in accordance with claim 1 wherein the photogenerating layers are selected from amorphous selenium, selenium arsenic alloys, selenium tellurium alloys, metal free phthalocyanines, metal phthalocyanines, and vanadyl phthalocyanine.
Claim 6
Dependent Claim
16 words
An improved photoresponsive device in accordance with claim 4 wherein the phthalocyanine is X-metal free phthalocyanine.
Claim 7
Dependent Claim
44 words
An improved photoresponsive device in accordance with claim 4 wherein the percentage by weight of selenium in the selenium arsenic alloy ranges from about 95 to about 100 percent, and the percentage by weight of arsenic ranges from about 5 to about 0 percent.
Claim 8
Dependent Claim
31 words
An improved photoresponsive device in accordance with claim 1 wherein the first photogenerating layer is comprised of vanadyl phthalocyanine, and the second photogenerating layer is comprised of an arsenic selenium alloy.
Claim 9
Dependent Claim
20 words
An improved photoresponsive device in accordance with claim 7 wherein the photogenerating materials are dispersed in an organic resin binder.
Claim 10
Dependent Claim
33 words
An improved photoresponsive device in accordance with claim 1 wherein the charge transport layer is N,N'-diphenyl-N,N'-bis(alkylphenyl)-[1,1,-biphenyl]-4,4'-diamine wherein alkyl is selected from the group consisting of 2-methyl, 3-methyl, 4-methyl, ethyl, propyl, butyl, and hexyl.
Claim 11
Dependent Claim
15 words
An improved photoresponsive device in accordance with claim 1 wherein the transport layer is N,N'-diphenyl-N,N'-bis(chlorophenyl)-[1,1'-biphenyl]-4,4'-diamine.
Claim 12
Dependent Claim
17 words
An improved photoresponsive device in accordance with claim 1 wherein the supporting substrate is conductive or insulating.
Claim 13
Dependent Claim
20 words
An improved photoresponsive device in accordance with claim 11 wherein the substrate is comprised of aluminum, or a polymeric substance.
Claim 14
Dependent Claim
24 words
An improved photoresponsive device in accordance with claim 11 wherein the substrate ranges in thickness of from about 3 mils to about 10 mils.
Claim 15
Dependent Claim
18 words
An improved photoresponsive device in accordance with claim 1 wherein the highly insulating organic resin is a polyester.
Claim 16
Dependent Claim
87 words
An improved method for providing positive images from either positive or negative originals, which comprises forming a latent electrostatic image on the photoresponsive device of claim 1, by positively charging the surface of the photoresponsive device, or negatively charging the surface of the photoresponsive device, contacting the image with developer particles comprised of carrier particles and toner particles, wherein the toner particles can be positively charged, or negatively charged, followed by transfer of the developed image to a suitable substrate and optionally, permanently affixing the images thereon.
Claim 17
Dependent Claim
30 words
An improved method in accordance with claim 15, wherein X is ortho (CH 3 ), meta (CH 3 ), para (CH 3 ), ortho (Cl), meta (Cl), or para (Cl).
Claim 18
Dependent Claim
57 words
An improved method in accordance with claim 16, wherein the first photogenerating layer ranges in thickness of from about 0.05 microns to about 10 microns, the second photogenerating layer ranges in thickness of from about 0.05 microns to about 2 microns, and the transport layer ranges in thickness of from about 5 microns to about 30 microns.
Claim 19
Dependent Claim
31 words
An improved method in accordance with claim 15 wherein the photogenerating layers are selected from amorphous selenium, selenium arsenic alloys, selenium tellurium alloys, metal free phthalocyanines, metal phthalocyanines and vanadyl phthalocyanine.
Claim 20
Dependent Claim
16 words
An improved imaging method in accordance with claim 18 wherein the phthalocyanine is X-metal free phthalocyanine.
Claim 21
Dependent Claim
45 words
An improved imaging method in accordance with claim 18 wherein the percentage by weight of selenium in the selenium arsenic alloy ranges from about 95 to about 100 percent, and the percentage by weight of arsenic ranges from about 5 percent to about 0 percent.
Claim 22
Dependent Claim
31 words
An improved imaging method in accordance with claim 15 wherein the first photogenerating layer is comprises of vanadyl phthalocyanine, and a second photogenerating layer is comprised of an arsenic selenium alloy.
Claim 23
Dependent Claim
20 words
An improved imaging method in accordance with claim 21 wherein the photogenerating materials are dispersed in an organic resin binder.
Claim 24
Dependent Claim
33 words
An improved imaging method in accordance with claim 15 wherein the charge transport layer is N,N'-diphenyl-N,N'-bis(alkylphenyl)-[1,1-biphenyl]-4,4'-diamine wherein alkyl is selected from the group consisting of 2-methyl, 3-methyl, 4-methyl, ethyl, propyl, butyl, and hexyl.
Claim 25
Dependent Claim
15 words
An improved imaging method in accordance with claim 15 wherein the transport layer is N,N'-diphenyl-N,N'-bis(chlorophenyl)-[1,1'-biphenyl]-4,4'-diamine.
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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) | 1986-10-17 | 1987-04-18 | 1987-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-17 | 1991-04-18 | 1991-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-17 | 1995-04-18 | 1995-10-18 | $7700.00 | Window Closed / Lapsed |