US4061599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for preparation of a photoconductor surface for use in electrophotography
Assignee: Individual
•
Filing: 1976-02-06
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Granted: 1977-12-06
•
Expires: 1996-02-06
Abstract
Abstract A surface is prepared for use in electrophotography by spraying an enamel slip comprising a non-aqueous carrier vehicle, a photoconductive powder and glass enamel frit thereon.
Inventors
- 👤 Guy Anthony Marlor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:25
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/085
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
130 words
An enamel slip devoid of natural and synthetic resins for use in the preparation of a photoconductive surface wherein the slip is sprayed upon the surface, said enamel slip comprising a mixture of: solids comprising a photoconductive powder and a glass powder, both powders having an average particle size below ten microns; a carrier vehicle comprising a plurality of organic solvents, at least one of said plurality of organic solvents being selected to enhance atomization of the slip during spraying and at least one of said plurality of organic solvents being selected as a physical suspension element for the solids; and particulate solid means for suspending the solids in the carrier vehicle by physical dispersion, the particulate solid means for suspending being substantially chemically and electrically nonreactive with the solids.
Claim 2
Dependent Claim
130 words
An enamel slip devoid of natural and synthetic resins for use in the preparation of a photoconductive surface wherein the slip is sprayed upon the surface, said enamel slip comprising a mixture of: solids comprising a photoconductive powder and a glass powder, both powders having an average particle size below ten microns; a carrier vehicle comprising a plurality of organic solvents, at least one of said plurality of organic solvents being selected to enhance atomization of the slip during spraying and at least one of said plurality of organic solvents being selected as a physical suspension element for the solids; and particulate solid means for suspending the solids in the carrier vehicle by physical dispersion, the particulate solid means for suspending being substantially chemically and electrically nonreactive with the solids.
Claim 3
Dependent Claim
14 words
The enamel slip as in claim 1 wherein the photoconductive powder comprises cadmium sulfide.
Claim 4
Dependent Claim
18 words
The enamel slip as in claim 2 wherein the photoconductive powder includes between 1 and 8% cadmium selenide.
Claim 5
Dependent Claim
23 words
The enamel slip as in claim 1 wherein said glass powder comprises glass particles having an average size of three microns or less.
Claim 6
Dependent Claim
20 words
The enamel slip as in claim 4 wherein the glass powder has a firing temperature of 600° C or less.
Claim 7
Dependent Claim
27 words
The enamel slip as in claim 5 wherein the glass powder comprises glass particles having a coefficient of expansion approximately equal to that of said steel substrate.
Claim 8
Dependent Claim
21 words
The enamel slip as in claim 6 wherein the glass powder comprises between 30 and 70% by weight of said solids.
Claim 9
Dependent Claim
21 words
The enamel slip as in claim 7 wherein said photoconductor powder comprises between 70 and 30% by weight of said solids.
Claim 10
Dependent Claim
15 words
The enamel slip as in claim 1 wherein the particulate solid means comprise fumed silica.
Claim 11
Dependent Claim
9 words
The enamel slip as in claim 9 comprising lecithin.
Claim 12
Dependent Claim
22 words
The enamel slip as in claim 10 wherein said lecithin comprises between 1/10% and 4% of the total volume of the slip.
Claim 13
Dependent Claim
23 words
The enamel slip as in claim 9 wherein said fumed silica comprises between 1/4% and 4% of the total weight of said solids.
Claim 14
Dependent Claim
16 words
The enamel slip as in claim 1 wherein the particulate solid means comprise powdered aluminum oxide.
Claim 15
Dependent Claim
17 words
The enamel slip as in claim 1 further comprising an additive for use as a network former.
Claim 16
Dependent Claim
18 words
The enamel slip as in claim 14 wherein said additive for use as a network former comprises colloidon.
Claim 17
Dependent Claim
30 words
An enamel slip as in claim 1 wherein the carrier vehicle comprises at least one organic solvent selected from the group of solvents consisting of butyl acetate and butyl carbitol.
Claim 18
Dependent Claim
30 words
An enamel slip as in claim 1 wherein the carrier vehicle comprises at least one organic solvent selected from the group consisting of isopropyl alcohol, ethyl alcohol and methyl alcohol.
Claim 19
Dependent Claim
14 words
An enamel slip as in claim 1 wherein the carrier vehicle comprises amyl alcohol.
Claim 20
Dependent Claim
111 words
An enamel slip devoid of natural and synthetic resins for use in preparation of a photoconductive coating on a surface comprising: a carrier vehicle comprising a plurality of organic solvents, at least one solvent selected from the group of solvents consisting of butyl acetate and butyl carbitol and at least one solvent selected from the group consisting of isopropyl alcohol, ethyl alcohol and methyl alcohol; solids comprising a photoconductor powder and a glass powder, both powders having an average particle size below ten microns in diameter; and means for suspending the solids in the carrier vehicle by physical dispersion, the means for suspending being chemically and electrically nonreactive with the solids.
Claim 21
Dependent Claim
111 words
An enamel slip devoid of natural and synthetic resins for use in preparation of a photoconductive coating on a surface comprising: a carrier vehicle comprising a plurality of organic solvents, at least one solvent selected from the group of solvents consisting of butyl acetate and butyl carbitol and at least one solvent selected from the group consisting of isopropyl alcohol, ethyl alcohol and methyl alcohol; solids comprising a photoconductor powder and a glass powder, both powders having an average particle size below ten microns in diameter; and means for suspending the solids in the carrier vehicle by physical dispersion, the means for suspending being chemically and electrically nonreactive with the solids.
Claim 22
Dependent Claim
14 words
An enamel slip as in claim 19 wherein means for suspending comprise fumed silica.
Claim 23
Dependent Claim
9 words
An enamel slip as in claim 20 comprising lecithin.
Claim 24
Dependent Claim
10 words
An enamel slip as in claim 20 comprising amyl alcohol.
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) | 1980-12-05 | 1981-06-06 | 1981-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-05 | 1985-06-06 | 1985-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-05 | 1989-06-06 | 1989-12-06 | $7700.00 | Window Closed / Lapsed |