US3837849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayered variable speed photoreceptor and method of using same
Assignee: Xerox Corp
•
Filing: 1973-02-20
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Granted: 1974-09-24
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Expires: 1993-02-20
Abstract
Abstract A xerographic member which comprises a supporting substrate having thereon an insulating blocking layer, a layer of halogen doped selenium overlaying the insulating layer, and a transport layer of vitreous selenium overlaying the halogen doped layer. The member is imaged by charging to a negative polarity followed by uniformly exposing to light which results in the negative charge being trapped in the halogen doped layer. The member is then uniformly positively charged and exposed to a pattern of light which results in the formation of a latent electrostatic image.
Inventors
- 👤 A Ciuffini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:02
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; G03G13/00; G03G13/22; G03G5/02; G03G5/04; G03G5/043; G03G5/0433
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
29 words
The member of claim 1 in which the barrier layer comprises an insulating material selected from the group consisting of a polycarbonate resin, an epoxy resin and aluminum oxide.
Claim 2
Dependent Claim
25 words
The member of claim 1 in which the halogen doped layer further contains arsenic in an amount of up to about 5 percent by weight.
Claim 3
Dependent Claim
24 words
The member of claim 1 in which the transport layer further contains arsenic in an amount of up to about 5 percent by weight.
Claim 4
Dependent Claim
28 words
The member of claim 1 in which both the halogen doped layer and transport layer contain arsenic in an amount of up to about 5 percent by weight.
Claim 5
Independent Claim
175 words
A method of imaging which comprises: a. providing an imaging member which comprises a supporting substrate having thereon an overlaying electrically insulating blocking layer about 2 microns to 5 mils in thickness, said layer being sufficient to prevent charges of either polarity from flowing across said layer, a layer of halogen doped vitreous selenium about 2 to 100 microns thick overlaying said insulating layer, said halogen being in a concentration of about 2 to 2,000 parts per million by weight, and a transport layer of vitreous selenium about 10 to 200 microns thick overlaying said halogen doped layer, with said transport layer being relatively thicker than said halogen doped layer, b. uniformly charging the top surface of said imaging member to a negative polarity, c. uniformly exposing the member to a source of activating radiation which results in the negative charge being trapped within the halogen doped layer, d. uniformly positively charging said member, and e. exposing said member to a pattern of activating radiation which results in the formation of a latent electrostatic image.
Claim 6
Dependent Claim
17 words
The method of claim 6 in which the latent image is developed to form a visible image.
Claim 7
Dependent Claim
30 words
The method of claim 6 in which subsequent to forming the latent image, the member is uniformly negatively charged, resulting in a dissipation or recombination of the remaining image charge.
Claim 8
Dependent Claim
19 words
The method of claim 6 in which the initial uniform negative charging and uniform exposure are carried out simultaneously.
Claim 9
Dependent Claim
24 words
The method of claim 6 in which the positive surface charge remaining after image exposure is removed and the stored negative latent image developed.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |