Abstract: An apparatus for developing an electrostatic latent image on an imaging member with a liquid developing material, including a liquid developing material applicator, the housing defining an aperture adapted for transporting liquid developing material into contact with the imaging member, the housing further including a planar surface adjacent the aperture for providing a liquid developing material application region in which the liquid developing material can flow freely with the imaging member; a developing roll situated adjacent the liquid developing material applicator and downstream therefrom relative to a path of travel of the imaging member; and a cleaning system, operatively coupled to the liquid developing material applicator, for cleaning residue liquid developer material from the liquid developing material applicator and the developing roll.

Abstract: An apparatus for developing a latent image recorded on a surface, including a housing defining a chamber storing a supply of toner. A toner donor member is spaced from the image bearing surface and adapted to transport toner to a region opposed from the surface. A charging device is disposed in the chamber for ion charging the toner. An air injection system fluidizes the toner in the chamber. The injection system and a transport member cooperate with one another to define a region wherein a substantially constant quantity of toner having a substantially constant ion charge is deposited on the transport member. The toner is electrostatically transferred from the transport member to the donor member which contains interdigitated electrodes positioned near the surface of a dielectric core roll. An AC voltage is applied between the interdigitated electrodes to detach toner from the donor member so as to form a toner cloud for developing the latent image in an image on image process.

Abstract: An apparatus for developing a latent image recorded on a surface, including a housing defining a chamber storing a supply of developer material including toner and carrier beads. A toner donor member is spaced from the surface and is adapted to transport toner to a region opposed from the surface. A magnetic roller conveys the toner material in the chamber of the housing onto the donor member. An electrode member is spaced near the surface of a donor roll, the electrode member electrically biased by a power supply to detach toner from the donor member as to form a toner cloud for developing the latent image. A power supply controller, in communication with the power supply, is adapted to adjust the electrode member electrical biasing to avoid air breakdown induced contamination of the electrode member with toner.

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: A development system which includes a flexible donor belt having groups of electrode array near the surface of the belt is disclosed. The Electrode array has group areas in which perform the function of: Loading; Transferring; Developing; Transferring and Unloading. Each electrode array group area is independently addressable and operatively connected to voltage source in order to supply a voltage in the order of .quadrature.0-1000 volts AC or DC to each group area. The electrodes array group area picks up the toner from the magnetic brush. An electrode array group area connected to the voltage source via phase shifting circuitry such that a traveling wave pattern is established.

Abstract: A single piece, planar, integral corona generating device that applies a uniform charge to a charge retentive surface, including a dielectric layer, corona producing element formed on one side of the dielectric layer, reference electrode positioned on the other side of the dielectric layer, for controlling the charge level placed on the charge retentive surface by the corona producing element, for applying a low DC voltage to the reference electrode; and AC high voltage connected to the corona producing element for applying sufficient voltage to the corona producing elements so that ions are emitted from the reference electrode.

Abstract: An apparatus for developing a latent image recorded on a surface with toner. The apparatus includes a housing having a supply of toner therein; a donor member arranged in said housing to transport toner to a development zone adjacent the surface; a electrode member is provided for detaching toner from said donor member and produce a toner cloud in the development zone; and an air handling system, associated with said housing, for collecting stray toner particles emitted from said housing, said air handling system including a separator for separating toner by size. The air handling system includes a blower, a particle chamber and a valve assembly.

Abstract: A method of encoding an image at full resolution for storing in a reduced image buffer for subsequent decoding and printing by a marking device, the method including the steps of dividing the image into a plurality of blocks wherein each block is comprised of a plurality of pixels. The step of identifying a number of color regions present in each of the plurality of blocks. The step of selecting a predefined encoding process from a plurality of predefined encoding processes for each of the plurality of blocks according to the number of color regions present in each of the plurality of block. And, the step of storing the encoded plurality of blocks in the reduced image buffer for subsequent decoding and printing by the marking device.

Abstract: An apparatus for producing a color image on a sheet member including an electrographic master having representative of at least two color components of the color image. A transfer system is provided for transferring at least two color components of the color image from the electrographic master to a sheet member. A development system is provided for sequentially developing said at least two color components of the color image in a predetermined alignment on the electrographic master.

Abstract: A power supply for transmitting voltage to a device, including a web having a piezoelectric exterior layer for generating a voltage on the surface thereof in response to being deformed. The web is entrained about a roller arrangement to deform the piezoelectric exterior layer. Commutation brushes transfers the voltage generated on the surface of the piezoelectric exterior layer to the device. The roller arrangement in combination with the placement of commutation brushes and neutralization brushes are used to adjust the voltage to the device.

Abstract: An electrophotographic printing machine, wherein an electrostatic latent image recorded on a photoconductive member is developed with toner to form a visible image thereof, wherein the improvement includes an apparatus for alleviating toner contamination of the electrophotographic printing machine while maintaining high quality visible images. The apparatus includes a first housing defining a chamber storing a supply of toner of a first color; the first housing including a first toner donor member spaced a first predetermined spacing from the surface and being adapted to transport toner of the first color to a region opposed from the surface, and a second toner donor member spaced a second predetermined spacing from the surface and being adapted to transport toner of the first color to the region opposed from the surface; and wherein the first predetermined spacing is substantially greater than the second predetermined spacing.

Abstract: An ionographic printer bar directs a stream of ions from an integral ion source having a planar surface for emitting ions to a charge receptor to create an electrostatic latent image thereon. The ion stream passes through an aperture having associated therewith a focusing pinch electrode for narrowing the ion stream to a preselected width, displacing electrodes for positioning the narrowed ion stream within the aperture, and focus electrodes. The integral ion source is placed in propinquity in relation to the ionographic printer bar. The planar design of ion source allows reduce size of the ionographic printer bar because no support frame is needed and allow increase robustness of the ionographic printer bar which makes it easy to install in a machine and easy to clean.

Abstract: An apparatus for developing a latent image recorded on a surface with toner. The apparatus includes a housing having a supply of toner therein; a donor member arranged in the housing to transport toner to a development zone adjacent the surface; a detaching toner device for detaching toner from the donor member and producing a toner cloud in the development zone; and an air handling system, associated with the housing, for collecting stray toner particles emitted from the housing, the air handling system including a separator for separating toner by size.

Abstract: A method for selecting an optimum encoding process for a block of pixels from a plurality of predefined encoding processes, including the step of identifying a number of color regions present in the block. The step of determining geometric relationships between the color regions in the block. And, the step of selecting an encoding process from a plurality of encoding processes in response to the identifying step and the determining step.

Abstract: An apparatus for producing a color image on a sheet member including an electrographic master having a representative of at least two color components of the color image. A transfer system is provided for transferring at least two color components of the color image from the electrographic master to a sheet member. A development system is provided for sequentially developing said at least two color components of the color image in a predetermined alignment on the electrographic master.

Abstract: An apparatus and method for depositing a surface charge on a dielectric medium moving at a predetermine velocity in a direction of movement, including an endless web having an exterior layer comprising piezoelectric material, position adjacent to the dielectric medium, for generating and laying down the surface charge on the dielectric medium in response to the endless web being deformed.

Abstract: A printing system for producing a print job, the printing system including a print engine for imaging regular substrates, fed to the print engine from a regular substrate feeding apparatus and delivering the imaged regular substrates to an output; and a duplexer operatively coupled to the print engine having a first path for feeding imaged regular substrates to the print engine for duplex printing, the duplexer having a second, sheet insertion, path for feeding special sheets to the output of imaged regular substrates.

Abstract: A sheet handling system has an endless transporting and supporting belt for transporting sheet along a path. The belt includes a ferroelectric material layer for generating an electrostatic force on the surface thereof to retain the sheet.

Abstract: An apparatus for developing an image on an imageable surface with liquid developer including a housing having a chamber defined therein for holding liquid developer. A pump is provided for advancing liquid developer from the chamber of the housing to a development zone. An electrode member is provided having at least two segments electrically separated from each other by a insulating layer. The electrode member is positioned opposed from the imageable surface at a predefined distance forming the development zone therebetween. A power supply is provided for applying a electrical potential to the electrode member.

Abstract: Disclosed is a liquid developers comprised of a mixture of high and low vapor pressure fluids, and wherein there is enabled with such developers in embodiments excellent fixing characteristics especially when the developed image is transferred from an intermediate substrate to the final substrate, such as paper. In embodiments of the present invention there is provided developers and processes for achieving high fix wherein the developers contains a high vapor pressure fluid, such as an Isopar, like ISOPAR L.RTM., and a low vapor pressure fluid, such as NORPAR 15.RTM., SUPURLA NF5.RTM., and the like, and which low vapor pressure fluid is substantially odorless. The high vapor pressure fluid in embodiments is removed by heat once the developer is transferred to the intermediate substrate, and the low vapor pressure fluid remains with the developer when the developed image is transfixed, that is transferred, fixed and heated simultaneously, to a supporting substrate like paper.