US4390610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Layered electrophotographic imaging element, apparatus and method sensitive to gallium arsenide laser, the element including two charge generation layers and a polycarbonate adhesive layer
Assignee: IBM Information Products Corp
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Filing: 1981-10-29
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Granted: 1983-06-28
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Expires: 2001-10-29
Abstract
Abstract A laser printer having a gallium arsenide laser and a photoconductor sensitive to the output wave energy of such a laser, the photoconductor having ordered layering of (1) a polycarbonate polymer adhesive layer coated onto an electrically conductive substrate, (2) a first CDB or TMB containing charge generating layer, (3) a second OHSQ containing charge generating layer, and (4) a top-located charge transport layer.
Inventors
- 👤 Larry D. Bowden
- 👤 Albert H. Miyashita
- 👤 Charles I. Ravenelle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:47
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/043; G03G5/047
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
107 words
A layered electrophotographic imaging element, having a spectral sensitivity compatible with the spectral output of a gallium arsenide layer, which spectral output is maximum at about 8200 angstroms, said element comprising: an electrically conductive layer; a layer of polycarbonate polymer on said conductive layer and acting as an adhesive layer for a first charge generating layer containing an active charge generating constituent selected from the group chlorodiane blue and tetramethylbenzidine, located on said polycarbonate layer; a second charge generating layer on said first charge generating layer and containing hydroxy squarylium as its active charge generating constituent; and a charge transport layer on said second charge generating layer.
Claim 2
Dependent Claim
107 words
A layered electrophotographic imaging element, having a spectral sensitivity compatible with the spectral output of a gallium arsenide layer, which spectral output is maximum at about 8200 angstroms, said element comprising: an electrically conductive layer; a layer of polycarbonate polymer on said conductive layer and acting as an adhesive layer for a first charge generating layer containing an active charge generating constituent selected from the group chlorodiane blue and tetramethylbenzidine, located on said polycarbonate layer; a second charge generating layer on said first charge generating layer and containing hydroxy squarylium as its active charge generating constituent; and a charge transport layer on said second charge generating layer.
Claim 3
Dependent Claim
14 words
The layered element of claim 1 wherein said charge transport layer is p-type material.
Claim 4
Dependent Claim
13 words
The layered element of claim 2 wherein said p-type material is a hydrazone.
Claim 5
Dependent Claim
77 words
An electrophotographic process comprising: negatively charging in the dark the surface of an electrophotographic imaging element comprising in ordered layers: a conductive substrate, a polycarbonate polymer layer, a first charge generating layer whose active material is selected from the group CDB and TMB, a second charge generating layer whose active material is OHSQ, and a p-type charge transport layer; and exposing the imaging element to an imagewise pattern of radiation output provided by a gallium arsenide laser.
Claim 6
Dependent Claim
77 words
An electrophotographic process comprising: negatively charging in the dark the surface of an electrophotographic imaging element comprising in ordered layers: a conductive substrate, a polycarbonate polymer layer, a first charge generating layer whose active material is selected from the group CDB and TMB, a second charge generating layer whose active material is OHSQ, and a p-type charge transport layer; and exposing the imaging element to an imagewise pattern of radiation output provided by a gallium arsenide laser.
Claim 7
Dependent Claim
19 words
The process defined by claim 4 wherein the charge transport material of said imaging element is a p-type hydrazone.
Claim 8
Dependent Claim
103 words
An electrophotographic device, comprising: a layered photoconductor having a layering-order of a polycarbonate polymer adhesive on an electrically conductive substrate; a first charge generating layer on said adhesive layer and containing an active charge generating constituent selected from the group CDB and TMB; a second charge generating layer on said first charge generating layer and containing hydroxy squarylium as its active charge generating constituent; and a charge transport layer on said second charge generating layer; means for applying an activating charge to said photoconductor; and gallium arsenide laser means operable to selectively discharge said charged photoconductor in accordance with electrical image data input.
Claim 9
Dependent Claim
103 words
An electrophotographic device, comprising: a layered photoconductor having a layering-order of a polycarbonate polymer adhesive on an electrically conductive substrate; a first charge generating layer on said adhesive layer and containing an active charge generating constituent selected from the group CDB and TMB; a second charge generating layer on said first charge generating layer and containing hydroxy squarylium as its active charge generating constituent; and a charge transport layer on said second charge generating layer; means for applying an activating charge to said photoconductor; and gallium arsenide laser means operable to selectively discharge said charged photoconductor in accordance with electrical image data input.
Claim 10
Dependent Claim
32 words
The device of claim 6 wherein said means for applying an activating charge is operable to charge said photoconductor to a negative polarity, and wherein said photoconductor's charge transport layer is p-type.
Claim 11
Dependent Claim
14 words
The device of claim 7 wherein said p-type charge transport layer is a hydrazone.
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) | 1986-06-27 | 1986-12-27 | 1987-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-27 | 1990-12-27 | 1991-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-27 | 1994-12-27 | 1995-06-28 | $7700.00 | Window Closed / Lapsed |