US3887367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for temperature stabilizing photoreceptors
Assignee: Xerox Corp
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Filing: 1973-12-26
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Granted: 1975-06-03
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Expires: 1993-12-26
Abstract
Abstract Improved development, stability endowed by better charging level, image resolution and a lower dark discharge rate are obtainable in selenium-arsenic containing photoreceptor utilizing a cascade or a magnetic brush development system and exposed to the aging effects of an environment associated with high voltage electrical discharge by raising and maintaining the temperature of the photoreceptor at a point within the range of about 10 percent -30 percent above controlled ambient conditions.
Inventors
- 👤 Delmer Gene Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:02
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/005; G03G21/00; G03G21/20; G03G21/206
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
62 words
A method for controlling photoreceptor fatigue effects in selenium-arsenic-containing xerographic photoreceptors evidenced by variations in charging level, poor image resolution and deletions due to high dark discharge rates, the improvement comprising heating and maintaining the photoreceptor at about constant temperature at a point within the range of about 10 percent - 30 percent above ambient conditions and no higher than about 40*C.
Claim 2
Independent Claim
62 words
A method for controlling photoreceptor fatigue effects in selenium-arsenic-containing xerographic photoreceptors evidenced by variations in charging level, poor image resolution and deletions due to high dark discharge rates, the improvement comprising heating and maintaining the photoreceptor at about constant temperature at a point within the range of about 10 percent - 30 percent above ambient conditions and no higher than about 40*C.
Claim 3
Independent Claim
62 words
A METHOD FOR CONTROLLING PHOTORECEPTOR FATIGUE EFFECTS IN SELENIUM-ARSENIC-CONTAINING XEROGRAPHIC PHOTORECEPTORS EVIDENCED BY VARIATIONS IN CHARGING LEVEL, POOR IMAGE RESOLUTION AND DELETIONS DUE TO HIGH DARK DISCHARGE RATES, THE IMPROVEMENT COMPRISING HEATING AND MAINTAINING THE PHOTORECEPTOR AT ABOUT CONSTANT TEMPERATURE AT A POINT WITHIN THE RANGE OF ABOUT 10 PERCENT - 30 PERCENT ABOVE AMBIENT CONDITIONS AND NO HIGHER THAN ABOUT 40*C.
Claim 4
Independent Claim
62 words
A METHOD FOR CONTROLLING PHOTORECEPTOR FATIGUE EFFECTS IN SELENIUM-ARSENIC-CONTAINING XEROGRAPHIC PHOTORECEPTORS EVIDENCED BY VARIATIONS IN CHARGING LEVEL, POOR IMAGE RESOLUTION AND DELETIONS DUE TO HIGH DARK DISCHARGE RATES, THE IMPROVEMENT COMPRISING HEATING AND MAINTAINING THE PHOTORECEPTOR AT ABOUT CONSTANT TEMPERATURE AT A POINT WITHIN THE RANGE OF ABOUT 10 PERCENT - 30 PERCENT ABOVE AMBIENT CONDITIONS AND NO HIGHER THAN ABOUT 40*C.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein the heating step is effected at a constant temperature within the range of about 28*-38*C.
Claim 6
Dependent Claim
19 words
The method of claim 1 wherein the temperature of the photoreceptor is maintained by one or more heating means.
Claim 7
Dependent Claim
23 words
The method of claim 3 wherein temperature of the photoreceptor is maintained at least in part by moving warmed air onto the photoreceptor.
Claim 8
Dependent Claim
16 words
The method of claim 4 wherein air is prefiltered, heated and blown across a photoconductor surface.
References Cited (Backward Citations)
US2803542A
Cited
US3312548A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |