Abstract: An electrophotographic printing machine of the type in which an electrostatic latent image recorded on a charge retentive surface is developed with toner particles to form a visible image thereof, including: a housing having a supply of toner and developer therein; a donor member for transporting toner from the housing to a development zone; a first manifold, adjacent to the donor member, having an air stream for removing toner emission; a second manifold, adjacent to the donor member, having an air stream for removing toner emission; and a cyclone separator system, connected to the first manifold and the second manifold, for separating the toner from the air stream and returning toner particles of a predefined size back into the housing.

Abstract: An electrophotographic printing machine of the type in which an electrostatic latent image recorded on a charge retentive surface is developed with toner particles to form a visible image thereof, including: a toner dispenser; a donor member for transporting toner from the housing to a development zone; and a cyclone separator system, connected to the toner dispenser, for separating the toner and supplying toner particles of a predefined size into the housing.

Abstract: An electrophotographic printing machine of the type in which an electrostatic latent image recorded on a charge retentive surface is developed with toner particles to form a visible image thereof, including: a housing having a supply of toner and developer therein; a donor member for transporting toner from the housing to a development zone; a first manifold, adjacent to the donor member, having an air stream for removing toner emission; a second manifold, adjacent to the donor member, having an air stream for removing toner emission; and a cyclone separator system, connected to the first manifold and the second manifold, for separating the toner from the air stream and returning toner particles of a predefined size back into the housing.

Abstract: An electrophotographic printing machine of the type in which an electrostatic latent image recorded on a charge retentive surface is developed with toner particles to form a visible image thereof, including: a toner dispenser; a donor member for transporting toner from the housing to a development zone; and a cyclone separator system, connected to the toner dispenser, for separating the toner and supplying toner particles of a predefined size into the housing.

Abstract: An airborne toner collection manifold for an electrostatographic printer for coupling in fluid flow communication with a vacuum source includes an inlet, a collection duct, a first exhaust duct and a second exhaust duct. The inlet defines a gap slot extending longitudinally between a first end and a second end. The collection duct is adjacent to the inlet and has a first end extending longitudinally at least to the first end of the gap slot of the inlet and a second end extending longitudinally at least to the second end of the gap slot of the inlet. The collection duct defines a cavity in fluid flow communication with the gap slot. The first exhaust duct is in fluid flow communication with the cavity of the collection duct and is configured to be coupled for fluid flow communication with the vacuum source. The second exhaust duct is in fluid flow communication with the cavity of the collection duct and is configured to be coupled for fluid flow communication with the vacuum source.

Abstract: An airborne toner collection manifold for an electrostatographic printer for coupling in fluid flow communication with a vacuum source includes an inlet, a collection duct, a first exhaust duct and a second exhaust duct. The inlet defines a gap slot extending longitudinally between a first end and a second end. The collection duct is adjacent to the inlet and has a first end extending longitudinally at least to the first end of the gap slot of the inlet and a second end extending longitudinally at least to the second end of the gap slot of the inlet. The collection duct defines a cavity in fluid flow communication with the gap slot. The first exhaust duct is in fluid flow communication with the cavity of the collection duct and is configured to be coupled for fluid flow communication with the vacuum source. The second exhaust duct is in fluid flow communication with the cavity of the collection duct and is configured to be coupled for fluid flow communication with the vacuum source.

Abstract: An electrophotographic marking device includes a xerographic marking module and an environmental control module which controls temperature and relative humidity inside the marking module. The environmental module has a main plenum chamber and a divided or split plenum chamber to create and supply two air streams with different temperatures and/or different humidities and/or different airflow volumes and/or airflow rates to a marking engine. A primary air stream plenum chamber is closed loop controlled by input from one or more temperature and/or humidity sensors in the xerographic module. A secondary air stream plenum chamber is open loop controlled by means of one or more temperature and/or humidity sensors in one or mode developer housings. Heating of the secondary air stream is achieved by heat generated in the developer housing(s) and/or one or more heaters distinct from the developer unit elements. The system achieves balanced, thermodynamically adjusted, air flows.

Abstract: An electrophotographic marking device includes a xerographic marking module and an environmental control module which controls temperature and relative humidity inside the marking module. The environmental module has a main plenum chamber and a divided or split plenum chamber to create and supply two air streams with different temperatures and/or different humidities and/or different airflow volumes and/or airflow rates to a marking engine. A primary air stream plenum chamber is closed loop controlled by input from one or more temperature and/or humidity sensors in the xerographic module. A secondary air stream plenum chamber is open loop controlled by means of one or more temperature and/or humidity sensors in one or mode developer housings. Heating of the secondary air stream is achieved by heat generated in the developer housing(s) and/or one or more heaters distinct from the developer unit elements. The system achieves balanced, thermodynamically adjusted, air flows.

Abstract: An electrophotographic printing machine of the type in which an electrostatic latent image recorded on a charge retentive surface is developed with toner particles to form a visible image thereof. A Hybrid Scavengeless Development (HSD) developer housing designed to control toner emission by employing two internal capture[JMC16], external exhaust manifolds. The location of the two manifolds are placed above and below the upper and lower donor rolls respectively. The manifolds are mounted in position to improve emissions control as well as reductions in the flow needed to accomplish the task. The upper and lower manifolds are able to control the loose toner emitted by the housing and lower powder cloud, they cannot collect the toner released by the upper powder cloud. To prevent toner accumulation in the middle regions of the wire module, a manifold is incorporated as an integral part of the wire module frame.

Abstract: A charging device includes a housing defining a chamber, the chamber having a floor, the floor having disposed therein an elongated slot pressure port and a plurality of circular hole vacuum ports. Four air flow conduits are disposed under the chamber floor to provide separate pressure air flows and vacuum air flows through the chamber. These four air flow conduits comprise two pressure conduits and two vacuum conduits. The two pressure conduits and two vacuum conduits are respectively connected at one of their ends by two turn-around connectors. Separate pressure air supply connections and vacuum air supply connections are applied to the respective other ends of the two pressure conduits and two vacuum conduits. As a result, pressure air is applied at both ends of the pressure conduit adjacent to the floor, thus causing pressure air flow through the pressure port and into the chamber.

Abstract: An electrophotographic printing machine of the type in which an electrostatic latent image recorded on a charge retentive surface is developed with toner particles to form a visible image thereof. A Hybrid Scavengeless Development (HSD) developer housing designed to control toner emission by employing two internal capture[JMC16], external exhaust manifolds. The location of the two manifolds are placed above and below the upper and lower donor rolls respectively. The manifolds are mounted in a position to improve emissions control as well as reductions in the flow needed to accomplish the task The upper and lower manifolds are able to control the loose toner emitted by the housing and lower powder cloud, they cannot collect the toner released by the upper powder cloud. To prevent toner accumulation in the middle regions of the wire module, a manifold is incorporated as an integral part of the wire module frame.

Abstract: An electrophotographic printing machine in which an electrostatic latent image is recorded on a moving photoconductive surface by charging the appropriate areas of the surface to predetermined polarities. The latent image is a developed in a development zone with toners of a preselected color and predetermined polarity which are delivered by magnetic bead carriers. A bead removal device is provided adjacent the surface and downstream from the development zone relative to the movement of the surface. The bead removal device magnetically attracts carrier beads off the photoconductive surface. The beads are then deposited in a sump. A vacuum source is also provided for urging beads into the sump from the surface. The bead removal device comprising a sleeve mounted for rotation in a housing, adjacent the surface. The sleeve has a fixed magnet disposed proximate the surface therein and a shunt disposed generally opposite the magnet to define an attraction zone and a release zone.

Abstract: An electrophotographic printing machine in which an electrostatic latent image is recorded on a photoconductive surface by charging the appropriate areas of the surface to predetermined polarities. The latent image is a developed with toners of a preselected color and predetermined polarity by a developer unit. The developer unit includes a bead removal device which magnetically attracts carrier beads off the photoconductive surface and deposits these beads in a sump or reservoir of developer. The bead removal device includes a magnet and magnetic field shapers to enhance the magnetic fields which attract the beads in the zone between the surface and the bead removal device and attenuates the magnetic fields in the zone between the bead removal device and the sump or reservoir to reduce the attraction between the beads and the bead removal device in this zone.