US3930853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accelerating aging method for selenium-arsenic photoconductors
Assignee: Xerox Corp
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Filing: 1973-12-06
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Granted: 1976-01-06
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Expires: 1993-12-06
Abstract
Abstract A method for expediting the breaking in or aging of xerographic photoreceptors comprising a substrate and at least one selenium and arsenic-containing photoconductor layers and to improve low density image differentiation by initially exposing the photoconductor layers to a visible or ultraviolet light flux while at a temperature of not less than about 85°C.
Inventors
- 👤 Anthony J. Ciuffini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:23
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08207; G03G21/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
58 words
In a process for improving the operating efficiency and to increase low density copy resolution of a xerographic photoreceptor comprising a substrate and at least one selenium-arsenic alloy as a photoconductor layer, the improvement comprising exposing the uncharged photoconductor layer of the photoreceptor to a nonimaging visible or ultraviolet light flux while at a temperature of about 55°-180°C.
Claim 2
Dependent Claim
58 words
In a process for improving the operating efficiency and to increase low density copy resolution of a xerographic photoreceptor comprising a substrate and at least one selenium-arsenic alloy as a photoconductor layer, the improvement comprising exposing the uncharged photoconductor layer of the photoreceptor to a nonimaging visible or ultraviolet light flux while at a temperature of about 55°-180°C.
Claim 3
Dependent Claim
18 words
The process of claim 1 comprising exposing the photoconductor layer to a light flux of about 4,000-7,000 Angstrom.
Claim 4
Dependent Claim
26 words
The process of claim 2 wherein the photoconductor layer is exposed to visible white light while the photoconductor is within a temperature range of about 85°-170°C.
Claim 5
Dependent Claim
34 words
The process of claim 2 wherein at least one photoconductor layer comprising selenium and not less than about 5% be weight of arsenic is exposed to light for a period of about 15-120 minutes.
Claim 6
Dependent Claim
18 words
The process of claim 2 wherein the photoconductor layer comprises selenium and about 5-50% by weight of arsenic.
Claim 7
Dependent Claim
22 words
The process of claim 2 wherein the photoconductor layer is exposed to light at an intensity of about 100-300 microwatts/cm 2 .
Claim 8
Dependent Claim
18 words
The process of claim 3 wherein the photoconductor layer contains selenium and about 5-50% by weight of arsenic.
Claim 9
Dependent Claim
24 words
The process of claim 3 wherein the photoconductor layer is exposed to cool white light at an intensity of about 150-200 microwatts/cm 2 .
Claim 10
Dependent Claim
27 words
The process of claim 8 wherein the photoconductor layer is permitted to cool from about 170°C. for about 30-120 minutes in the presence of cool white light.
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) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |