US4619879A
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US
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Composite type photosensitive member having metal-free phthalocyanine in the charge generating layer and nonionic dye base in the charge transport layer
Assignee: Hitachi Ltd
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Filing: 1985-01-28
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Granted: 1986-10-28
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Expires: 2005-01-28
Abstract
Abstract The disclosure is concerned with a photoconductive member useful for electrophotography wherein a charge generating layer containing a new metal-free phthalocyanine and a charge transport layer containing a nonionic compound of styrylic or oxazol dye base. The photosensitive member exhibits a high sensitivity to light having a long wavelength and therefore, it is properly used as photosensitive member for printers using semiconductor lasers.
Inventors
- 👤 Atsushi Kakuta
- 👤 Hiroyuki Oka
- 👤 Shigeo Suzuki
- 👤 Kotaro Araya
- 👤 Yasuki Mori
- 👤 Hirosada Morishita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:29
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/14; C09B23/145; C09B23/0091; C09B47/00; C09B47/04; C09B47/30; C09B67/00; C09B67/0025; C09B67/0033; C09B67/0034; C09B67/0035; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/043; G03G5/047; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0631; G03G5/0635; G03G5/0637; G03G5/0664; G03G5/0666; G03G5/0668; G03G5/067; G03G5/0696
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
147 words
In a composite type photosensitive member for electrophotography in which a layer containing a charge generating substance and a layer containing a charge transport substance is disposed on a conductive substrate, the improvement wherein said charge generating substance contains at least one of a τ, τ', η or τ' form metal-free phthalocyanine pigment and said charge transport substance contains a nonionic dye base represented by the following general formula: ##STR4## (where X is a heterocyclic group selected from ##STR5## (where Z represents O or S and the heterocyclic group may be substituted), n is 0, 1 or 2 and each of R 1 and R 2 is an alkyl group of up to three carbon atoms), whereby a photosensitive member having a high sensitivity to light not only in the visible light range but also in the long wavelength range of at least 790 nm is formed.
Claim 2
Dependent Claim
147 words
In a composite type photosensitive member for electrophotography in which a layer containing a charge generating substance and a layer containing a charge transport substance is disposed on a conductive substrate, the improvement wherein said charge generating substance contains at least one of a τ, τ', η or τ' form metal-free phthalocyanine pigment and said charge transport substance contains a nonionic dye base represented by the following general formula: ##STR4## (where X is a heterocyclic group selected from ##STR5## (where Z represents O or S and the heterocyclic group may be substituted), n is 0, 1 or 2 and each of R 1 and R 2 is an alkyl group of up to three carbon atoms), whereby a photosensitive member having a high sensitivity to light not only in the visible light range but also in the long wavelength range of at least 790 nm is formed.
Claim 3
Dependent Claim
36 words
A composite type photosensitive member as defined in claim 1, wherein the charge generating layer has a thickness of 20 μm or less and the charge transport layer has a thickness of 5 to 100 μm.
Claim 4
Dependent Claim
36 words
A composite type photosensitive member as defined in claim 1, wherein the charge generating layer has a thickness of 0.1 to 3 μm and the charge transport layer has a thickness of 8 to 30 μm.
Claim 5
Dependent Claim
33 words
A composite type photoconsensitive member as defined in claim 1, wherein the charge generating layer is formed on an electroconductive layer and the charge transport layer is formed on the charge generating layer.
Claim 6
Dependent Claim
31 words
A composite type photosensitive member as defined in claim 4, wherein the charge transport layer is substantially transparent to the light having a wavelength of from 500 nm to 800 nm.
Claim 7
Dependent Claim
56 words
A composite type photosensitive member as defined in claim 1, wherein the layer containing a charge generating substance is a layer of a mixture of at least one of the phthalocyanines and a resinous binder in an amount of one part by weight of the former per up to 4 part by weight of the latter.
Claim 8
Dependent Claim
35 words
A composite type photosensitive member as defined in claim 6, wherein the mixing ratio of the charge transport substance to a binder resin is one part by weight to 0.5 to 4 part by weight.
Claim 9
Dependent Claim
18 words
A composite type photosensitive member as defined in claim 6, wherein the resinous binder is a butyral resin.
Claim 10
Dependent Claim
19 words
A composite type photosensitive member as defined in claim 6, wherein the resinous binder is a saturated polyester resin.
Claim 11
Dependent Claim
18 words
A composite type photosensitive member as defined in claim 6, wherein the resinous binder is an acrylic resin.
Claim 12
Dependent Claim
17 words
A composite type photosensitive member as defined in claim 6, wherein the phthalocyanine is τ' form phthalocyanine.
Claim 13
Dependent Claim
34 words
A composite type photosensitive member as defined in claim 1, wherein the η, η', τ and τ' form metal-free phthalocyanine has infrared absorption spectra as set forth in Table 1 of the present disclosure.
Claim 14
Dependent Claim
38 words
A composite type photosensitive member as defined in claim 1, wherein said charge generating substance includes another charge generating material in addition to said at least one of a τ, τ', η or η' form metal-free phthalocyanine pigment.
Claim 15
Dependent Claim
35 words
A composite type photosensitive member as defined in claim 1, said member having a high sensitivity to light not only in the visible light range but also in the long wavelength range of 790-810 nm.
Claim 16
Dependent Claim
14 words
A composite type photosensitive member as defined in claim 1, wherein X is ##STR6##
Claim 17
Dependent Claim
27 words
A composite type photosensitive member as defined in claim 1, wherein said charge generating substance is constituted by τ form metal-free phthalocyanine pigment, and X is ##STR7##
Claim 18
Dependent Claim
21 words
A composite type photosensitive member as defined in claim 1, wherein said charge generating substance contains τ form metal-free phthalocyanine pigment.
Claim 19
Dependent Claim
23 words
A composite type photosensitive member as defined in claim 17, wherein X is a heterocyclic group selected from the group consisting of ##STR8##
Claim 20
Dependent Claim
14 words
A composite type photosensitive member as defined in claim 18, wherein Z is 0.
Claim 21
Dependent Claim
19 words
A composite type photosensitive member as defined in claim 19, wherein the heterocyclic group is substituted with a halogen.
Claim 22
Dependent Claim
23 words
A composite type photosensitive member as defined in claim 1, wherein X is a heterocyclic group selected from the group consisting of ##STR9##
Claim 23
Dependent Claim
14 words
A composite type photosensitive member as defined in claim 21, wherein Z is 0.
Claim 24
Dependent Claim
19 words
A composite type photosensitive member as defined in claim 22, wherein the heterocyclic group is substituted with a halogen.
Claim 25
Dependent Claim
21 words
A composite type photosensitive member as defined in claim 1, wherein said charge generating substance contains τ' form metal-free phthalocyanine pigment.
Claim 26
Dependent Claim
23 words
A composite type photosensitive member as defined in claim 24, wherein X is a heterocyclic group selected from the group consisting of ##STR10##
Claim 27
Dependent Claim
14 words
A composite type photosensitive member as defined in claim 25, wherein Z is 0.
Claim 28
Dependent Claim
19 words
A composite type photosensitive member as defined in claim 26, wherein the heterocyclic group is substituted with a halogen.
Claim 29
Dependent Claim
21 words
A composite type photosensitive member as defined in claim 1, wherein said charge generating substance contains η form metal-free phthalocyanine pigment.
Claim 30
Dependent Claim
23 words
A composite type photosensitive member as defined in claim 28, wherein X is a heterocyclic group selected from the group consisting of ##STR11##
Claim 31
Dependent Claim
14 words
A composite type photosensitive member as defined in claim 29, wherein Z is 0.
Claim 32
Dependent Claim
19 words
A composite type photosensitive member as defined in claim 30, wherein the heterocyclic group is substituted with a halogen.
Claim 33
Dependent Claim
21 words
A composite type photosensitive member as defined in claim 1, wherein said charge generating substance contains η' form metal-free phthalocyanine pigment.
Claim 34
Dependent Claim
23 words
A composite type photosensitive member as defined in claim 32, wherein X is a heterocyclic group selected from the group consisting of ##STR12##
Claim 35
Dependent Claim
14 words
A composite type photosensitive member as defined in claim 33, wherein Z is 0.
Claim 36
Dependent Claim
19 words
A composite type photosensitive member as defined in claim 34, wherein the heterocyclic group is substituted with a halogen.
Claim 37
Dependent Claim
27 words
A composite type photosensitive member as defined in claim 1, wherein said charge generating substance contains at least one of τ and η form metal-free phthalocyanine pigment.
Claim 38
Dependent Claim
34 words
A composite type photosensitive member as defined in claim 1, wherein said layer containing a charge transport substance has, as the sole charge transport substance, said nonionic dye base represented by said general formula.
References Cited (Backward Citations)
US4450218A
Cited
US4507374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-27 | 1990-04-28 | 1990-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-27 | 1994-04-28 | 1994-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-27 | 1998-04-28 | 1998-10-28 | $7700.00 | Window Closed / Lapsed |