Abstract: An extrudable magnet composition includes composite particles including thermoplastic resin and magnetic material, and a surface additive selected from silicon dioxide particles and ferrite particles, wherein the surface additive is applied to a surface of the composite particles.

Abstract: A donor member, useful in ionographic or electrophotographic apparatuses and preferably useful in hybrid scavengeless development units, has a substrate and an oxidized transport coating thereover. The oxidized transport coating includes a polymer binder, charge transporting molecules and one or more oxidizing agents. The polymer binder of the donor roll coating preferably includes one of (1) a crosslinked polymer with charge transporting molecules dispersed therein, or (2) a crosslinked polyamide binder with hydroxy charge transport molecules dispersed therein. The donor roll is preferably included in a printing machine that develops latent images formed on a photoconductive member.

Abstract: A donor member useful in ionographic or electrophotographic apparatuses and preferably useful in hybrid scavengeless development units, having a substrate and an oxidized transport coating including charge transport molecules, polymer binder, and an oxidized oligo arylamine salt comprising a cation of an oligo arylamine molecule and a counter anion.

Abstract: An electrophotographic printing machine in which an electrostatic latent image recorded on an imaging surface is developed with toner particles to form a visible image thereof, including a hopper containing a supply of carrier material; a first developer unit for developing the electrostatic latent image with toner particles of a first color; a second developer unit for developing the electrostatic latent image with toner particles of a second color; conduit for connecting the first and second developer unit to the hopper so that carrier material flows to the first and second developer unit; a first feeding system, in communication with the conduit, for regulating the amount of carrier to the first developer unit; a second feeding system in communication with the conduit, for regulating the amount of carrier to the second developer unit, and a controller for controlling the regulation rate of the first and the second feeding system independently.

Abstract: A development system which includes a dual auger assembly, mounted in a housing, for mixing developer materials in which a trickle port is between the dual auger assembly at an end of the housing which enables combining the cleaner waste toner and trickle waste in a single without the need of an additional auger.

Abstract: A donor roll for transporting marking particles to an electrostatic latent image recorded on a surface is provided. The donor roll includes a rotatably mounted body and an electrode member mounted on the body. The donor roll further includes a magnetically permeable core external to the body. The core rotates with the body. The core is composed of a plurality of wires. The donor roll further includes an electrically conductive material positioned on the core. The material is electrically connected to the electrode member.

Abstract: An apparatus for developing a latent image recorded on a surface, the apparatus includes a housing defining a chamber storing a supply of developer material including toner; a toner donor member spaced from the surface and being adapted to transport toner to a region opposed from the surface; a magnetic brush for conveying the developer material in the chamber of the housing onto the donor member; and a rigid planar porous electrode member spaced near the surface of a donor roll, the electrode member being electrically biased to detach toner from the donor member as to form a toner cloud for developing the latent image.

Abstract: A color electrophotographic printing machine, wherein an electrostatic latent image recorded on a photoconductive member is developed with toner of a first color and toner of a second color to form a visible image thereof, the electrophotographic printing machine including a system, for removing contaminates from toner of a first color and toner of a second color moving from a toner dispenser to a developer housing, the system including: a mounting assembly, a filter system mounted on the mounting assembly, the filter system having a screen for permitting toner of the first color to travel therethrough while inhibiting contaminants from traveling therethrough when vibrated; a first vibration driver, operatively connected to the screen, for vibrating the screen; a second filter system mounted on the mounting assembly, the filter system having a screen for permitting toner of the second color to travel therethrough while inhibiting contaminants from traveling therethrough when vibrated; and a second vibration d

Abstract: An apparatus for filtering contaminants from marking particles is provided. The apparatus includes a conduit and a mover for moving the marking particles within the conduit. The apparatus also includes a screen positioned adjacent the conduit so that substantially all the marking particles discharged from the conduit pass through the screen.

Abstract: A novel wire module support structure for controlling the spacing and edge wire angle of an electrode wire relative to a donor roll in a scavengeless development process is disclosed. A stationary wire support is arc shaped with a rounded edge and is located in close proximity to the donor roll end. This spatial relationship between the donor roll end and the wire support surface optimizes the donor roll surface to wire relationship. The wire support surface may be at a greater or lesser radius than the the donor roll surface. When the wire support surface is located at a larger radius than the donor roll surface, a clamp assembly is used to control the height of the wires with respect to the donor roll surface.

Abstract: A device for forming two twisted loops on the ends of a wire electrode to be used in scavengeless development. The wire is supported at both ends in a wire twisting apparatus and a specified tension is applied to the free ends of the wire. A crank is turned so that the both ends of the wire rotate at the same time. This causes the free ends of the wire to twist upon the suspended wire portion, two loops being formed at the ends of the wire. The twisted sections are stable and strong enough to maintain the loops when the wire is mounted in the development system.

Abstract: A magnetic brush developer roll structure comprising a stationary magnet assembly including a magnet assembly shaft supporting magnet material. Bearings carried by the shaft, in turn, support a rotatable shell or tube forming the outer member of the roll structure. The bearings together with the shell or tube delineate an essentially sealed cavity in which one or more electrical contact brushes are disposed. The brush rubs against an inner wall of the shell or tube and provides an electrical path thereto. Using a plurality of brushes results in improved reliability.

Abstract: A donor roll for transporting marking particles to an electrostatic latent image recorded on a surface is provided. The donor roll is adaptable for use with a power source to assist in transporting the marking particles. The donor roll includes a rotatably mounted body having a particle transportation portion, a support portion adjacent the particle transportation portion, and an external portion adjacent the support portion and spaced from the particle transportation portion. The donor roll further includes an electrode member mounted on the body and an electrical connector associated with the support portion of the body and electrically connected to the electrode member. The electrical connector is adapted to be electrically connectable to the power source.

Abstract: An apparatus for trapping a contaminant is provided. The apparatus includes a first member having a plurality of apertures in the first member and a second member having a plurality of apertures in the second member. The second member is in juxtaposition with the first member. A space between the first member and the second member is smaller than a maximum length of the contaminant.

Abstract: An apparatus for tensioning wires in a wire module assembly is disclosed. Prior to placing the wire module in an operable position, the wires are attached to the wire module and the tension is adjusted to obtain the proper operating tension. This is accomplished by having a fixed and an adjustable wire anchor support. The adjustable anchor support is positioned between two fixed cross members and an adjusting mechanism passes through a cross member, the adjustable anchor support and the other cross member. When the adjusting mechanism is turned, the adjustable anchor support translates between the two cross members.

Abstract: A donor roll for transporting marking particles to an electrostatic latent image recorded on a surface is provided. The donor roll includes a rotatably mounted body and an electrode member mounted on the body. The donor roll further includes a magnetically permeable core external to the body. The core rotates with the body. The donor roll further includes an electrically conductive material positioned on the core. The material is electrically connected to the electrode member.

Abstract: An apparatus for supporting wires in a wire module for use in a scavengeless development system using wire maintaining members that longitudinally support the wires. The tops of the wire maintaining members have grooves that positively position the wires and set a desired wire to wire spacing. The wire maintaining members are integral with the wire module and are part of a wire tensioning system. The wire maintaining members are part of an assembly that allow the wires to be pretensioned to the operable development tension prior to the wire module being mounted to the developer housing. The wire maintaining members also have a unique mounting system which allows the wire module to be rotatably mounted to the developer housing.

Abstract: A donor roll for transporting marking particles to an electrostatic latent image recorded on a surface is provided. The donor roll is adaptable for use with a commutator for applying an electrical field to the roll to assist in transporting the marking particles. The donor roll includes a rotatably mounted body and an electrode member mounted on the body. The donor roll further includes a connector operably associated with the body, electrically connected to the electrode member, and rotatable with the body. The connector is adapted to be removably connectable to the commutator.

Abstract: A roller assembly for use in an electrostatographic development apparatus to transport developer material through a development zone. The roller assembly includes end cap sections for mounting rotatably to a housing of the development apparatus, and a spincasted sleeve section interconnecting the end cap sections. The spincasted sleeve section includes an outer layer that has a series of non-radial undercuts formed thereinto for retaining developer material being transported. In order to achieve consistent precision at relatively lower costs, the sleeve section is produced by spincasting a desired quantity of filled thermoset material in a simple reusable silicone mold formed and held in a mud frame.

Abstract: A system for sealing a member rotating about an axis of a support is provided. The system includes a magnetic field producing member and a magnetizable member. The magnetizable member is positioned adjacent the magnetic member. The magnetizable member has at least a portion thereof progressively increasing in thickness in a direction substantially parallel to the axis as distance from the axis increases.