US5032481A
Expired / Lapsed
US
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Photoconductor elements with multiphase stress-dampening interlayers
Assignee: Eastman Kodak Co
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Filing: 1989-10-30
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Granted: 1991-07-16
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Expires: 2009-10-30
Abstract
Abstract An improved interlayer is provided for use in a photoconductor element between an electrically conductive layer and a charge generation layer of the type where a dye is aggregated in a matrix polymer. The interlayer is a mixture of at least one polyester and at least one polycarbonate. The interlayer provides excellent adhesion between the conductive layer and the charge generation layer and dampens any stress to which the photoconductive element is subjected. Minimal effect on photosensitivity is achieved by optimizing interlayer thickness.
Inventors
- 👤 Martin A. Berwick
- 👤 William T. Gruenbaum
- 👤 Paul D. VanderValk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:50
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0635; G03G5/0637
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
55 words
A photoconductive element that comprises an electrically conductive layer; an interlayer that comprises a mixture of at least one polyester and at least one polycarbonate; and a charge generation layer that has a discontinuous phase comprising at least one polymer having an alkylidene diarylene group in a recurring unit and at least one thiapyrylium-dye salt.
Claim 2
Dependent Claim
55 words
A photoconductive element that comprises an electrically conductive layer; an interlayer that comprises a mixture of at least one polyester and at least one polycarbonate; and a charge generation layer that has a discontinuous phase comprising at least one polymer having an alkylidene diarylene group in a recurring unit and at least one thiapyrylium-dye salt.
Claim 3
Dependent Claim
34 words
The photoconductor element of claim 1 wherein said polyester has an inherent viscosity in the range of about 0.4 to about 0.8 measured as a 0.5 g/dL solution in 1:1 phenol:chlorobenzene at 25° C.
Claim 4
Dependent Claim
33 words
The photoconductor element of claim 1 wherein said polycarbonate has an intrinsic viscosity in the range of about 1.2 to about 2.0 measured as a 0.25 g/dL solution in dichloromethane at 25° C.
Claim 5
Dependent Claim
21 words
The photoconductor element of claim 1 wherein said interlayer has a thickness in the range of about 0.1 to 1 micron.
Claim 6
Dependent Claim
22 words
The photoconductor element of claim 4 wherein said interlayer has a thickness is in the range of about 0.4 to 0.6 micron.
Claim 7
Dependent Claim
16 words
The photoconductor element of claim 4 wherein said interlayer has a thickness of about 0.5 micron.
References Cited (Backward Citations)
US4346158A
Cited
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 |