EP0150581A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus for charging, and transporting toner particles
Assignee: Xerox Corp
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Filing: 1984-11-23
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Granted: —
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Expires: 2004-11-23
Abstract
Abstract This invention is generally directed to an apparatus for charging toner particles comprised in operative relationship of a means for charging insulating toner particles (12) and a means for transporting (1) insulating toner particles, said means for charging (12) and said means for transporting (1) being charged to a predetermined potential, which apparatus further includes therein a brush device (21) for delivering toner particles to a charging nip (11) situated between the means for charging the toner particles (12) and the means for transporting the toner particles (1). The brush device (21) can also function as a charging source for the toner particles, and as a cleaning system. More specifically in one embodiment the present invention is directed to an apparatus for simultaneously metering, charging and transporting non-magnetic insulating toner particles comprising in operative relationship a metering roll means (12), an optional trim blade means (27) for said metering roll means, a toner supply reservoir means (25) containing therein weakly charged insulating toner particles possessing about an equal number of positive and negative charges thereon, a transporting hard roll (1) or donor belt means (2), a triboelectrically active coating contained on said transporting means, a drive roll means (4), an idler means (10), a tensioning means (14), an imaging means, a voltage source means (15) for the metering roll means, a voltage source means (6) for the drive roll means (4), and the transporting
Inventors
- 👤 Robert G. Martin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 03:08
CPC Classifications
B; B82; B82Y; B82Y15/00; G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0806; G03G2215/00; G03G2215/06; G03G2215/0602; G03G2215/0604; G03G2215/0614; G03G2215/0634; G03G2215/0636
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
70 words
An apparatus for charging toner particles comprised in operative relationship of a means (12) for charging insulating toner particles and a means (1) for transporting the charged particles, the charging means and the transporting means being adapted to be charged to a predetermined potential, which apparatus further includes therein a brush (21) for delivering toner particles to a charging nip (11) situated between the charging means and the transporting means.
Claim 2
Independent Claim
70 words
An apparatus for charging toner particles comprised in operative relationship of a means (12) for charging insulating toner particles and a means (1) for transporting the charged particles, the charging means and the transporting means being adapted to be charged to a predetermined potential, which apparatus further includes therein a brush (21) for delivering toner particles to a charging nip (11) situated between the charging means and the transporting means.
Claim 3
Dependent Claim
91 words
An apparatus in accordance with Claim 1 wherein the means for charging contains a triboelectrically active coating thereon, and the insulating toner particles are charged to a positive or negative polarity, the charging being accomplished in a charging zone situated between the means for charging and the means for transporting; wherein the means for charging is moving in a direction opposite to the direction of movement of the means for transporting, and the brush means is moving in a direction opposite to the direction of movement of the means for charging.
Claim 4
Dependent Claim
20 words
An apparatus in accordance with Claim 1 or 2, wherein the triboelectrically active coating is contained on the transporting means.
Claim 5
Independent Claim
17 words
An apparatus in accordance with any preceding Claim, wherein the means for transporting is a hard roll.
Claim 6
Independent Claim
34 words
An apparatus in accordance with any preceding Claim, further including therein means for producing an electrostatic image on a copy medium, and wherein the charged insulating toner particles are deposited thereon in image configuration.
Claim 7
Dependent Claim
36 words
An apparatus in accordance with Claim 5 wherein the imaging means is comprised of a selenium photoconductor, or a layered organic photoconductive composition comprised of a substrate, a charge transport layer and a charge generating layer.
Claim 8
Independent Claim
165 words
An apparatus for simultaneously metering, charging and transporting non-magnetic insulating toner particles comprising in operative relationship a metering roll means, an optional trim blade means for said metering roll means, a toner supply reservoir means containing therein weakly charged insulating toner particles possessing about an equal number of positive and negative charges thereon, a trnsporting hard roll or donor belt means, a triboelectrically active coating contained on said transporting means, a drive roll means, an idler means, a tensioning means, an imaging means, a voltage source means for the metering roll means, a voltage source means for the drive roll means, and the transporting means, said metering roll means moving in a direction opposite to the direction of movement of the transporting means, and wherein the apparatus further includes a moving brush means contained in the toner supply reservoir which brush means contains bristles thereon, wherein the brush transports toner particles to a charging nip situated between the metering roll means and the transporting means.
Claim 9
Independent Claim
165 words
An apparatus for simultaneously metering, charging and transporting non-magnetic insulating toner particles comprising in operative relationship a metering roll means, an optional trim blade means for said metering roll means, a toner supply reservoir means containing therein weakly charged insulating toner particles possessing about an equal number of positive and negative charges thereon, a trnsporting hard roll or donor belt means, a triboelectrically active coating contained on said transporting means, a drive roll means, an idler means, a tensioning means, an imaging means, a voltage source means for the metering roll means, a voltage source means for the drive roll means, and the transporting means, said metering roll means moving in a direction opposite to the direction of movement of the transporting means, and wherein the apparatus further includes a moving brush means contained in the toner supply reservoir which brush means contains bristles thereon, wherein the brush transports toner particles to a charging nip situated between the metering roll means and the transporting means.
Claim 10
Dependent Claim
37 words
An apparatus in accordance with Claim 7 wherein a voltage source means is connected to the brush means, and wherein a voltage of from about zero volts to about 300 volts is applied to the brush bristles.
Claim 11
Dependent Claim
41 words
An apparatus in accordance with Claim 7 or 8, wherein the transport donor belt means traverses a path defined by the drive roll means and the idler roll means, causing the charged insulating toner particles to contact the imaging member means.
Claim 12
Independent Claim
46 words
An apparatus in accordance with any of Claims 7 - 9, wherein the imaging member is comprised of amorphous selenium or amorphous selenium alloys; or wherein the imaging member is a layered photoresponsive device comprised of a substrate, a photogenerating layer and a charge transport layer.
Claim 13
Dependent Claim
33 words
An apparatus in accordance with Claim 10, wherein the charge- generating layer is vanadyl phthalocyanine or trigonal selenium, and the transport layer is comprised of diamine molecules dispersed in an inactive resinous binder.
Claim 14
Independent Claim
56 words
An apparatus in accordance with any of Claims 7 - 11, wherein the triboelectric coating is of electronegative material selected from the group consisting of trifluorochloroethylene and vinylchloride copolymers, polyvinylidene fluorides, polytetrachlorofluoroethylenes, perfluoroalkoxylated ethylenes, polytetrafluoroalkoxy ethylenes, and polyvinylchlorides; or of electropositive material selected from the group consisting of polyvinylpyridines, terpolymers of methacrylates, and thermoplastic toner resins.
References Cited (Backward Citations)
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