Abstract: According to various embodiments, the present teachings include electrophotographic charging devices and methods for charging a receptor with a solid state charging device. In an exemplary embodiment, the solid state charging device can include a dielectric layer, a first electrode disposed adjacent to a first surface of the dielectric layer, and a second electrode, wherein the second electrode has a first surface disposed adjacent to a second surface of the dielectric layer. The solid state charging device can further include a plurality of nanostructures, wherein each of the plurality of nanostructures has an end in electrical contact with a second surface of the second electrode. The exemplary solid state charging devices including the nanostructures can use less voltage than conventional charging devices, produce a reduced amount of oxidizing agents, such as, ozone and NOx, and/or operate at a lower temperature.

Abstract: Electrophotographic charging devices that can be used to charge or discharge, for example, a receptor in the electrophotographic process are provided. According to various embodiments, the exemplary charging devices can include a coronode disposed opposing and spaced apart from a receptor, and a plurality of nanostructures, wherein each of the plurality of nanostructures has an end, edge, or side in electrical contact with the coronode. The exemplary charging devices including the nanostructures can use less power, i.e. voltage and/or current than conventional charging devices and produce a reduced amount of oxidizing agents, such as, ozone and NOx. The nanostructures can serve to increase the intensity of the local electric fields for more efficient charge generation at reduced voltages.

Abstract: In accordance with the invention, there is an electrophotographic charging device comprising a first electrode, a second electrode adjacent the first electrode, a plurality of nanostructures adhering to the first electrode, and voltage supplies electrically connected to the first electrode and the second electrode, wherein the voltage difference between the first electrode and the second electrode creates a high electric field at the nanostructures to cause charge species generation that is deposited on a receptor.

Abstract: Non-contact corona charging of a small radius moving surface to a desired surface voltage with a single corona charging system with a first corona generator applying a first charge through a screen grid having a first bias voltage to initially charge the surface to more than half of the desired voltage, and then a second corona generator applies the remainder of the desired surface charge through a separate screen grid having a second bias voltage. The two corona generators may be spaced pin arrays angled relative to one another and substantially perpendicular to their adjacent moving surface areas. The two screen grids may be electrically planar and angled relative to one another, substantially parallel to their adjacent moving surface areas.

Abstract: A development system for an electrophotographic machine in which uncharged toner is stored in a housing having an opening. A rotatable dispensing roll is mounted in the housing opening. An overhung metering blade mounted at the housing opening meters a layer of uncharged toner onto the dispensing roll. An ion or electron charging device places a charge on the toner layer residing on the dispensing roll prior to the transportation thereof by the dispensing roll to a captive magnetic brush. The magnetic brush transports the two component developer on the magnetic brush to a development zone for either direct development of a latent image on a moving imaging surface or to coat donor rolls for AC/DC generated toner cloud development of a latent image.

Abstract: A carrier includes at least one magnetic material and a conductive material. The conductive material is at least one carbon nanotube. A developer includes a toner and the carrier.

Abstract: A coating member includes a substrate and a coating layer over the substrate where the coating layer includes carbon nanotubes dispersed in a polymeric binder. The member, which is suitable for use in an electrostatographic printing process, can be in the form of a fuser member, a fixing member, a pressure roller, or a release agent donor member.

Abstract: In accordance with the invention, there is an electrophotographic charging device comprising a first electrode, a second electrode adjacent the first electrode, a plurality of nanotubes adhering to at least one of the first electrode and the second electrode, and a voltage supply electrically connected to the first electrode and the second electrode, wherein the first electrode and the second electrode impart charge to a portion of a gaseous material that is deposited on a receptor.

Abstract: Electron charging of particles, as may be associated with electrographic and/or xerographic image forming devices, powder coat finishing devices and/or guns, or the like, is performed by subjecting a stream of particles to electron bombardment from at least one electrode overcoated with nanotubes, such as carbon nanotubes. An alternating electric field may be employed to reduce the possibility of charged particles being deposited on opposing electrodes in an electron charging zone defined by the electrodes. Particles of varying sizes, and of irregular shapes, may be uniformly charged while required input voltages to the system are reduced based on efficiencies gained through nanotube technology.

Abstract: A system for electrostatic powder coating irregular shaped, three-dimensional articles with 10 ?m average diameter powder particles. A supply of powder particles are triboelectrically charged and transported onto one or more donor rolls without the need from fluidization of the powder particles. The charged powder particles on the one or more donor rolls are metered to provide a uniform layer thereon. A combination of AC electric fields and/or air jet detach the powder particles from the one or more donor rolls and produce a powder cloud that is directed to the grounded article to be coated. A layer of powder particles coats the outer surface of the article, and the layer is subsequently cured to form a permanent and durable film on the article.

Abstract: A process for forming curable powder comprises providing an aqueous dispersion of particles of curable resin and optionally particles comprising at least one curing agent; aggregating the particles optionally with the curing agent to form aggregated particles; coalescing the aggregated particles to form fused particles; and removing the fused particles from the aqueous dispersion. By the process, a curable powder is formed. The curable powder may be used in powder coating.

Abstract: A process for forming curable powder comprises providing an aqueous dispersion of particles of curable resin and optionally particles comprising at least one curing agent; aggregating the particles optionally with the curing agent to form aggregated particles; coalescing the aggregated particles to form fused particles; and removing the fused particles from the aqueous dispersion. By this process, a curable powder is formed. The curable powder may be used in powder coating.

Abstract: A non-interactive development system generates a toner cloud in a development zone by an AC biased stationary electrode positioned in contact with the back surface of a movable toned dielectric donor belt having a patterned electrode structure on the front surface thereof. The AC biased electrode produces AC fringe fields near the edges of the patterned electrode structure that cause the generation of a toner cloud for developing an electrostatic latent image. The donor belt is partially wrapped around a magnetic brush to produce a toner loading zone. Isolated patterned electrodes on the donor belt near the entrance region of the toner loading zone are biased to cause unloading of toner from the donor belt, while isolated electrodes near the exit region of the toner loading zone are biased to cause toner reloading of the donor belt.

Abstract: There is disclosed an apparatus for effecting the charging of insulating toner particles in a charging zone situated between a moving roller, and a toner transporting roller or belt with a coating thereover comprised of a mixture of fluoropolymers and conductive particulate particles, such as carbon black. The coating may be textured with silica particles. Useful polymers selected for the coating include fluorinated ethylene propylenepolytetrafluoro ethylene copolymers.