US4764841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toner charging apparatus with coated toner transport members
Assignee: Xerox Corp
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Filing: 1984-12-14
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Granted: 1988-08-16
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Expires: 2004-12-14
Abstract
Abstract An apparatus for charging insulating toner particles comprised, in operative relationship, of a means for charging insulating toner particles and a means for transporting insulating toner particles, said means for charging and said means for transporting biased to a predetermined potential wherein the transporting means contains therein a coating selected from the group consisting of a chlorotrifluoroethylene vinyl chloride copolymer, styrene copolymers, and silicone resins with conductive particulate particles therein.
Inventors
- 👤 Grace T. Brewington
- 👤 Dan A. Hays
- 👤 William H. Wayman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:24
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0806; G03G15/0818; G03G15/0812; G03G2215/00; G03G2215/06; G03G2215/0602; G03G2215/0604; G03G2215/0614; G03G2215/0634; G03G2215/0636; G03G2215/0641
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
92 words
An apparatus for charging insulating toner particles comprised, in operative relationship, of a means for charging insulating toner particles and a means for transporting insulating toner particles, said means for charging and said means for transporting biased to a predetermined potential wherein the transporting means contains thereover a coating comprised of silicone resins with conductive particulate particles therein, and wherein the means for charging contains thereover a triboelectrically active coating selected from the group consisting of copolymers of chlorotrifluoroethylene and vinyl chloride, halogenated polymers, polyvinylpyridines, terpolymers of methacrylate, silane terpolymers, and polycaprolactum.
Claim 2
Independent Claim
92 words
An apparatus for charging insulating toner particles comprised, in operative relationship, of a means for charging insulating toner particles and a means for transporting insulating toner particles, said means for charging and said means for transporting biased to a predetermined potential wherein the transporting means contains thereover a coating comprised of silicone resins with conductive particulate particles therein, and wherein the means for charging contains thereover a triboelectrically active coating selected from the group consisting of copolymers of chlorotrifluoroethylene and vinyl chloride, halogenated polymers, polyvinylpyridines, terpolymers of methacrylate, silane terpolymers, and polycaprolactum.
Claim 3
Dependent Claim
33 words
An apparatus in accordance with claim 1 wherein the coating is present on the entire outer surface of the transporting means in a thickness of from about 2 micrometers to about 125 micrometers.
Claim 4
Dependent Claim
14 words
An apparatus in accordance with claim 1 wherein the conductive particles are carbon black.
Claim 5
Dependent Claim
12 words
An apparatus in accordance with claim 1 wherein the coating is textured.
Claim 6
Dependent Claim
13 words
An apparatus in accordance with claim 4 wherein the texturing agent is silica.
Claim 7
Dependent Claim
16 words
An apparatus in accordance with claim 1 wherein the coating is deposited on a metallic substrate.
Claim 8
Dependent Claim
14 words
An apparatus in accordance with claim 6 wherein the metallic substrate is electroformed nickel.
Claim 9
Dependent Claim
16 words
An apparatus in accordance with claim 1 wherein the coating is deposited on a polymeric composition.
Claim 10
Dependent Claim
24 words
An apparatus in accordance with claim 1 wherein there is further included a means for imaging comprised of an inorganic, or organic photoconductive composition.
Claim 11
Dependent Claim
31 words
An apparatus in accordance with claim 9 wherein the inorganic composition is selenium, and the organic composition is comprised of a substrate, a charge generating layer and a charge transport layer.
Claim 12
Dependent Claim
25 words
An apparatus in accordance with claim 1 wherein the halogenated polymers are polyvinylidine fluoride, polytetrafluoroethylenes, perfluoroalkoxylated ethylenes, fluorinated ethylene propylene, polytetrafluoroethylene copolymers, or polyvinyl chloride.
Claim 13
Dependent Claim
16 words
An apparatus in accordance with claim 1 wherein the terpolymers and methacrylates are polymethylmethacrylates or polystyrene/n-butylmethacrylate.
Claim 14
Dependent Claim
28 words
An apparatus in accordance with claim 1 wherein the conductivity of the surface of the means for transporting is from about 10 6 to about 10 10 ohm-cm.
Claim 15
Independent Claim
139 words
An apparatus for simultaneously metering and charging nonmagnetic insulating toner particles comprising, in operative relationship, a metering/charging roll means; a triboelectrically active coating present on the metering/charging roll means; a doctor blade means for the metering/charging roll means; a toner supply reservoir means containing therein weakly charged insulating toner particles comprised of about an equal number of positively charged toner particles and negatively charged toner particles; a transport toner donor means comprised of a nickel sleeve with a coating thereover comprised of silicone resins with conductive particulate particles therein with a coating thickness of from about 2 micrometers to about 125 micrometers; a voltage source means for the metering/charging means; a voltage source means for the nickel sleeve means, the metering/charging roll means moving in a direction opposite to the direction of movement of the transport donor sleeve means.
Claim 16
Independent Claim
139 words
An apparatus for simultaneously metering and charging nonmagnetic insulating toner particles comprising, in operative relationship, a metering/charging roll means; a triboelectrically active coating present on the metering/charging roll means; a doctor blade means for the metering/charging roll means; a toner supply reservoir means containing therein weakly charged insulating toner particles comprised of about an equal number of positively charged toner particles and negatively charged toner particles; a transport toner donor means comprised of a nickel sleeve with a coating thereover comprised of silicone resins with conductive particulate particles therein with a coating thickness of from about 2 micrometers to about 125 micrometers; a voltage source means for the metering/charging means; a voltage source means for the nickel sleeve means, the metering/charging roll means moving in a direction opposite to the direction of movement of the transport donor sleeve means.
Claim 17
Dependent Claim
40 words
An apparatus in accordance with claim 14 wherein the triboelectrically active coating for the metering/charging roll means is selected from the group consisting of copolymers of chlorotrifluoroethylene and vinyl chloride, halogenated polymers, polyvinylpyridines, terpolymers of methacrylate, silane terpolymers, and polycaprolactum.
Claim 18
Dependent Claim
25 words
An apparatus in accordance with claim 15 wherein the halogenated polymers are polyvinylidine fluoride, polytetrafluoroethylenes, perfluoroalkoxylated ethylenes, fluorinated ethylene propylene, polytetrafluoroethylene copolymers, or polyvinyl chloride.
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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) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |