US4797337A
Expired / Lapsed
US
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Disazo photoconductive imaging members
Assignee: Xerox Corp
•
Filing: 1987-07-27
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Granted: 1989-01-10
•
Expires: 2007-07-27
Abstract
Abstract Photoconductive imaging members comprising a supporting substrate, a hole transport layer, and a photogenerating layer comprising disazo compounds selected from the group consisting of: ##STR1## wherein X is selected from the group consisting of: ##STR2## wherein Y is selected from the group consisting of: ##STR3## The photoconductive imaging members possess high cyclic stability, high photosensitivity, good dark development potential, low dark decay values, and excellent panchromaticity. They are non-toxic and may be made inexpensively, which renders them disposable.
Inventors
- 👤 Kock-Yee Law
- 👤 Ihor W. Tarnawskyj
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:18
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/34; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0675; G03G5/0679; G03G5/0681
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
46 words
A photoconductive imaging member comprising a supporting substrate, a hole transport layer, and a photogenerating layer comprising disazo compounds selected from the group consisting of: ##STR8## wherein X is selected from the group consisting of: ##STR9## wherein Y is selected from the group consisting of: ##STR10##
Claim 2
Dependent Claim
46 words
A photoconductive imaging member comprising a supporting substrate, a hole transport layer, and a photogenerating layer comprising disazo compounds selected from the group consisting of: ##STR8## wherein X is selected from the group consisting of: ##STR9## wherein Y is selected from the group consisting of: ##STR10##
Claim 3
Dependent Claim
24 words
A photoconductive imaging member in accordance with claim 1 wherein the photogenerating layer is situated between the supporting substrate and the hole transport layer.
Claim 4
Dependent Claim
24 words
A photoconductive imaging member in accordance with claim 1 wherein the hole transport layer is situated between the supporting substrate and the photogenerating layer.
Claim 5
Dependent Claim
31 words
A photoconductive imaging member in accordance with claim 1 wherein the photoconductive imaging member includes therein a metal oxide hole blocking layer situated between the supporting substrate and the photogenerating layer.
Claim 6
Dependent Claim
16 words
A photoconductive imaging member in accordance with claim 4 wherein the metal oxide is aluminum oxide.
Claim 7
Dependent Claim
25 words
A photoconductive imaging member in accordance with claim 4 wherein the metal oxide hole blocking layer has a thickness of less than about 50 Angstroms.
Claim 8
Dependent Claim
32 words
A photoconductive imaging member in accordance with claim 4 wherein the photoconductive imaging member includes therein an adhesive interface layer situated between the supporting substrate and the metal oxide hole blocking layer.
Claim 9
Dependent Claim
29 words
A photoconductive imaging member in accordance with claim 7 wherein the adhesive interface layer comprises a polymeric material selected from the group consisting of polyester, polyvinylbutyral, and polyvinyl pyrrolidone.
Claim 10
Dependent Claim
23 words
A photoconductive imaging member in accordance with claim 7 wherein the adhesive interface layer has a thickness of less than about 0.6 micron.
Claim 11
Dependent Claim
16 words
A photoconductive imaging member in accordance with claim 1 wherein the supporting substrate is a metal.
Claim 12
Dependent Claim
14 words
A photoconductive imaging member in accordance with claim 10 wherein the metal is aluminum.
Claim 13
Dependent Claim
18 words
A photoconductive imaging member in accordance with claim 1 wherein the supporting substrate is an organic polymeric composition.
Claim 14
Dependent Claim
24 words
A photoconductive imaging member in accordance with claim 1 wherein the supporting substrate has a thickness of from about 3 to about 100 mils.
Claim 15
Dependent Claim
24 words
A photoconductive imaging member in accordance with claim 1 wherein the supporting substrate has a thickness of from about 3 to about 10 mils.
Claim 16
Dependent Claim
24 words
A photoconductive imaging member in accordance with claim 1 wherein the photogenerating layer has a thickness of from about 0.05 to about 10 microns.
Claim 17
Dependent Claim
24 words
A photoconductive imaging member in accordance with claim 1 wherein the photogenerating layer has a thickness of from about 0.1 to about 3 microns.
Claim 18
Dependent Claim
25 words
A photoconductive imaging member in accordance with claim 1 wherein the hole transport layer has a thickness of from about 5 to about 50 microns.
Claim 19
Dependent Claim
36 words
A photoconductive imaging member in accordance with claim 1 wherein the azo photogenerating compound in dispersed in a resinous binder in an amount of from about 5 percent by weight to about 95 percent by weight.
Claim 20
Dependent Claim
23 words
A photoconductive imaging member in accordance with claim 18 wherein the resinous binder is a polyester, polyvinyl butyral, a polycarbonate, or polyvinyl formal.
Claim 21
Dependent Claim
19 words
A photoconductive imaging member in accordance with claim 1 wherein the hole transport layer comprises an aryl amine compound.
Claim 22
Dependent Claim
41 words
A photoconductive imaging member in accordance with claim 20 wherein the aryl amine comprises molecules of the formula: ##STR11## dispersed in a highly insulating and transparent organic resinous binder wherein X is selected from the group consisting of alkyl and halogen.
Claim 23
Dependent Claim
29 words
A photoconductive imaging member in accordance with claim 21 wherein X is selected from the group consisting of ortho (CH 3 ), meta(CH 3 ),para(CH 3 ),ortho(Cl),meta(Cl), and para(Cl).
Claim 24
Dependent Claim
23 words
A photoconductive imaging member in accordance with claim 21 wherein the resinous binder is a polyester, polyvinyl butyral, a polycarbonate, or polyvinyl formal.
Claim 25
Dependent Claim
15 words
A photoconductive imaging member in accordance with claim 1 wherein the disazo compound is 2,7-bis(1'-azo-2'-hydroxy-3'-naphtho-2",3"-dichloroanilide)fluoren-9-one.
Claim 26
Dependent Claim
15 words
A photoconductive imaging member in accordance with claim 1 wherein the disazo compound is 2,7-bis(1'-azo-2'-hydroxy-3'-naphtho-3",5"-dichloroanilide)fluoren-9-one.
Claim 27
Dependent Claim
15 words
A photoconductive imaging member in accordance with claim 1 wherein the disazo compound is 2,7-bis(1'-azo-2'-hydroxy-3'-naphtho-2"-fluoroanilide)dibenzothiophenesulfone.
Claim 28
Dependent Claim
15 words
A photoconductive imaging member in accordance with claim 1 wherein the disazo compound is 2,7-bis(1'-azo-2'-hydroxy-3'-naphtho-3"-fluoroanilide)dibenzothiophenesulfone.
Claim 29
Dependent Claim
15 words
A photoconductive imaging member in accordance with claim 1 wherein the disazo compound is 2,7-bis(1'-azo-2'-hydroxy-3'-naphtho-4"-fluoroanilide)dibenzothiophenesulfone.
Claim 30
Dependent Claim
15 words
A photoconductive imaging member in accordance with claim 1 wherein the disazo compound is 2,7-bis(1'-azo-2'-hydroxy-3'-naphtho-2",5"-difluoroanilide)dibenzothiophenesulfone.
Claim 31
Dependent Claim
15 words
A photoconductive imaging member in accordance with claim 1 wherein the disazo compound is 2,7-bis(1'-azo-2'-hydroxy-3'-naphtho-2",4"-difluoroanilide)dibenzothiophenesulfone.
Claim 32
Dependent Claim
15 words
A photoconductive imaging member in accordance with claim 1 wherein the disazo compound is 2,7-bis(1'-azo-2'-hydroxy-3'-naphtho-3",5"-difluoroanilide)dibenzothiophenesulfone.
Claim 33
Dependent Claim
15 words
A photoconductive imaging member in accordance with claim 1 wherein the disazo compound is 2,7-bis(1'-azo-2'-hydroxy-3'-naphtho-3"-trifluoromethylanilide)dibenzothiophenesulfone.
Claim 34
Dependent Claim
26 words
A photoconductive imaging member in accordance with claim 1 wherein the imaging member exhibits a dark development potential of from about -730 to about -980 volts.
Claim 35
Dependent Claim
27 words
A photoconductive imaging member in accordance with claim 1 wherein the imaging member exhibits a dark decay of from about -10 to about -115 volts per second.
Claim 36
Dependent Claim
25 words
A photoconductive imaging member in accordance with claim 1 wherein the imaging member exhibits a residual potential of from about -5 to about -20 volts.
Claim 37
Dependent Claim
28 words
A photoconductive imaging member in accordance with claim 1 wherein the imaging member exhibits a photosensitivity of from about 2.4 to about 11.9 ergs/cm 2 at 600 nanometers.
Claim 38
Dependent Claim
65 words
A photoconductive imaging member in accordance with claim 1 wherein the imaging member exhibits a dark development potential of from about -820 to about -980 volts, a dark decay of from about -10 to about -55 volts per second, a residual potential of from about -5 to about -20 volts, and a photosensitivity of from about 2.4 to about 11.9 ergs/cm 2 at 600 nanometers.
Claim 39
Dependent Claim
48 words
A method of imaging which comprises the steps of: (a) generating an electrostatic image on the photoconductive imaging member of claim 1; (b) subsequently developing the electrostatic image; (c) transferring the developed electrostatic image to a suitable substrate; and (d) permanently affixing the transferred image to the substrate.
Claim 40
Dependent Claim
24 words
A method of imaging in accordance with claim 38 wherein the electrostatic image is developed by cascade, touchdown, powder cloud, or magnetic brush methods.
Claim 41
Dependent Claim
28 words
A method of imaging in accordance with claim 38 wherein the developed electrostatic image is transferred to a substrate by means of a corotron or a biased roll.
Claim 42
Dependent Claim
14 words
A method of imaging in accordance with claim 38 wherein the substrate is paper.
Claim 43
Dependent Claim
16 words
A method of imaging in accordance with claim 38 wherein the substrate is a transparency material.
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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) | 1992-01-10 | 1992-07-11 | 1993-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-10 | 1996-07-11 | 1997-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-10 | 2000-07-11 | 2001-01-10 | $7700.00 | Window Closed / Lapsed |