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US5032480A
Expired / Lapsed
US
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Multilayer electrophotographic photoreceptor
Assignee: Fujifilm Business Innovation Corp
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Filing: 1988-12-27
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Granted: 1991-07-16
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Expires: 2008-12-27
Abstract
Abstract An electrophotographic photoreceptor is disclosed, which comprises an electrically conductive substrate having thereon a photosensitive layer comprising a resin binder in which the following two kinds of charge generating materials are dispersed: (i) selenium or an alloy of selenium and (ii) a phthalocyanine derivative represented by the formula: ##STR1## wherein M represents AlCl, Mg, VO, InCl or H 2 . The electrophotographic photoreceptor exhibits a broad spectral sensitivity extending from the visible to the infrared regions of the spectrum and, therefore, can be suited for printers which utilize such light sources as semiconductor lasers, light emitting diodes, etc.
Inventors
- 👤 Kiyokazu Mashimo
- 👤 Fumio Ojima
- 👤 Masahiko Hozumi
- 👤 Taketoshi Hoshizaki
- 👤 Kazuyuki Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:28
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/09; G03G5/043; G03G5/047; G03G5/06; G03G5/0664; G03G5/0696; G03G5/08; G03G5/087
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
90 words
An electrophotographic photoreceptor which comprises an electrically conductive substrate having thereon a photosensitive layer comprising a resin binder in which the following two charge generating materials are dispersed: (i) selenium or an alloy of selenium and (ii) a phthalocyanine derivative represented by formula (I): ##STR5## wherein M represents AlCl, Mg, VO, InCl or H 2 and wherein said photosensitive layer comprises a charge generating layer having a thickness of about 0.1 to about 5 μm and a charge transport layer having a thickness of about 5 to about 50 μm.
Claim 2
Dependent Claim
90 words
An electrophotographic photoreceptor which comprises an electrically conductive substrate having thereon a photosensitive layer comprising a resin binder in which the following two charge generating materials are dispersed: (i) selenium or an alloy of selenium and (ii) a phthalocyanine derivative represented by formula (I): ##STR5## wherein M represents AlCl, Mg, VO, InCl or H 2 and wherein said photosensitive layer comprises a charge generating layer having a thickness of about 0.1 to about 5 μm and a charge transport layer having a thickness of about 5 to about 50 μm.
Claim 3
Dependent Claim
15 words
The electrophotosensitive photoreceptor as claimed in claim 1, wherein said selenium is a trigonal selenium.
Claim 4
Dependent Claim
17 words
The electrophotographic photoreceptor as claimed in claim 1, wherein said resin binder is a polyvinyl acetal resin.
Claim 5
Dependent Claim
21 words
The electrophotographic photoreceptor as claimed in claim 1, wherein in the phthalocyanine derivative of formula (I), M is H 2 .
Claim 6
Dependent Claim
24 words
The electrophotographic photoreceptor as claimed in claim 1, wherein the particle size of the charge generating materials is reduced to 5 μm or less.
Claim 7
Dependent Claim
28 words
The electrophotographic photoreceptor as claimed in claim 1, wherein the ratio by volume of said selenium or selenium alloy to said phthalocyanine derivatives is from 10/1 to 1/1.
Claim 8
Dependent Claim
28 words
The electrophotographic photoreceptor as claimed in claim 1, wherein the ratio by volume of said selenium or selenium alloy to said phthalocyanine derivatives is from 9/1 to 7/3.
Claim 9
Dependent Claim
32 words
The electrophotographic photoreceptor as claimed in claim 1, wherein the ratio by volume of said selenium or selenium alloy and said phthalocyanine derivatives to said resin binder is from 10/1 to 1/10.
Claim 10
Dependent Claim
32 words
The electrophotographic photoreceptor as claimed in claim 1, wherein the ratio by volume of said selenium or selenium alloy and said phthalocyanine derivatives to said resin binder is from 5/1 to 1/5.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-15 | 1995-01-14 | 1995-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-15 | 1999-01-14 | 1999-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-15 | 2003-01-14 | 2003-07-16 | $7700.00 | Window Closed / Lapsed |