US4258113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endless belt or cylinder for use with electrostatic imaging and method of making the same
Assignee: Stork Colorproofing BV
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Filing: 1977-12-27
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Granted: 1981-03-24
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Expires: 1997-12-27
Abstract
Abstract An endless belt or cylinder in which the base or substrate is a conductive member and there is a coating of a wholly inorganic, microcrystalline, high quantum yield, electronically anisotropic photoconductive material on the substrate. The coating is capable of being charged and thereafter exposed to radiant energy from an object such as a scene or pattern for selectively discharging the coating and providing a latent image of the object on the coating. The latent image can thereafter be developed by toner and transferred to a receptor such as a sheet of paper, cloth and the like. The belt may be formed of highly flexible synthetic organic resin such as polyester or the like and in such case the coating will be deposited onto an intervening thin layer of an ohmic material. The cylinder may be a relatively rigid one of metal. The coating may be cadmium sulfide. The method of making the cylinder or belt comprises forming the cylinder or belt and placing same in a sputtering apparatus and r.f. sputtering the coating onto the surface of the cylinder or belt.
Inventors
- 👤 Manfred R. Kuehnle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:46
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
89 words
An endless sleeve for electrostatic imaging and comprising a substrate of conductive material arranged for mounting in an imaging apparatus and having a photoconductive coating that has a thickness of the order of a micron and is at least about 2000 Angstroms thick, the coating being sputtered, microcrystalline, electrically anistropic, has a dark resistivity of at least 10 12 and a ratio of light to dark resistivity of at least 10 4 , is a durable, wholly inorganic photoconductive material that is capable of being charged, exposed and developed.
Claim 2
Dependent Claim
89 words
An endless sleeve for electrostatic imaging and comprising a substrate of conductive material arranged for mounting in an imaging apparatus and having a photoconductive coating that has a thickness of the order of a micron and is at least about 2000 Angstroms thick, the coating being sputtered, microcrystalline, electrically anistropic, has a dark resistivity of at least 10 12 and a ratio of light to dark resistivity of at least 10 4 , is a durable, wholly inorganic photoconductive material that is capable of being charged, exposed and developed.
Claim 3
Dependent Claim
15 words
The sleeve as claimed in claim 1 in which the substrate and coating are seamless.
Claim 4
Dependent Claim
16 words
The sleeve as claimed in claim 2 in which the substrate is a rigid metal cylinder.
Claim 5
Dependent Claim
43 words
The sleeve as claimed in claim 2 in which the substrate is a tubular member of synthetic resin having a layer of ohmic material a few hundred Angstroms thick bonded to the tubular member and sandwiched between that member and the photoconductive coating.
Claim 6
Dependent Claim
54 words
The sleeve as claimed in claim 2 in which the substrate is a tubular member of synthetic resin a fraction of a millimeter thick having a layer of ohmic material a few hundred Angstroms thick bonded to the tubular member and sandwiched between that member and the photoconductive coating, the sleeve being highly flexible.
Claim 7
Dependent Claim
35 words
The sleeve as claimed in claim 4 in which radiant energy is capable of passing through the wall of the sleeve, being transmitted to the extent of about 70% to 85% by the photoconductive coating.
Claim 8
Dependent Claim
16 words
The sleeve as claimed in claim 2 in which the photoconductive material is ultrapure cadmium sulfide.
Claim 9
Dependent Claim
16 words
The sleeve as claimed in claim 4 in which the photoconductive material is ultrapure cadmium sulfide.
Claim 10
Dependent Claim
16 words
The sleeve as claimed in claim 5 in which the photoconductive material is ultrapure cadmium sulfide.
Claim 11
Dependent Claim
16 words
The sleeve as claimed in claim 6 in which the photoconductive material is ultrapure cadmium sulfide.
Claim 12
Dependent Claim
44 words
A method of making a sleeve as claimed in claim 2 which comprises forming a tube from synthetic resin by means of heat, depositing a layer of ohmic material on the tube and sputtering a coating of the photoconductive material onto the ohmic layer.
Claim 13
Dependent Claim
34 words
The method as claimed in claim 11 in which the tube is formed by reshaping a flat member of said synthetic resin through the use of progressive tapered mandrels terminating in a cylindrical mandrel.
Claim 14
Dependent Claim
34 words
The method as claimed in claim 11 in which the tube is formed by extruding the same from a body of molten resin through a tube-defining opening and cooling the tube on a mandrel.
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) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |