Abstract: Cross-track spacing variations for a plurality of printer subsystems of an electrophotographic printing system are characterized by printing first and second test pattern and capturing image of the printed test patterns. The first and second test patterns are chosen so that the printed test patterns respond differently to cross-track spacing variations in different printer subsystems. The first and second digitized test patterns are analyzed to determine parameters that characterize an attribute of the printed test pattern as a function of cross-track position. A first defect model is used to determine estimated cross-track spacing variations for one or more printer subsystem as a function of the determined parameters.

Abstract: A system for charging a photoreceptor (3) includes a first corona charging unit (2) a first corona electrode (4), a first shell electrode (6), and a first high voltage power supply (22). The shell electrode is connected through a resistor to ground and the high voltage power supply is connected to the first corona electrode. A second corona charging unit (10) has a second corona electrode (12), and a first grid electrode (14) connected to a second shell electrode (16). A first corona current from the first high voltage power supply to the first corona electrode and a return current from the first shell electrode to ground is sensed and a voltage on the high voltage power supply is adjusted to maintain a constant difference. The first corona charging unit charges the photoreceptor to at least 63% of the desired voltage.

Abstract: A method of charging a photoreceptor (3) includes a first corona charging unit (2) a first corona electrode (4), a first shell electrode (6), and a first high voltage power supply (22). The shell electrode is connected through a resistor to ground and the high voltage power supply is connected to the first corona electrode. A second corona charging unit (10) has a second corona electrode (12), and a first grid electrode (14) connected to a second shell electrode (16). A first corona current from the first high voltage power supply to the first corona electrode and a return current from the first shell electrode to ground is sensed and a voltage on the first high voltage power supply is adjusted to maintain a constant difference. The first corona charging unit charges the photoreceptor to at least 63% of the desired voltage.

Abstract: The present invention is an electrostatographic reproduction apparatus which includes a primary imaging member for producing an electrostatic latent image, a development station for applying toner particles to said latent image which forms a developed toner image, and a transfer station for transferring said developed toner image from the primary imaging member to a receiver. A fuser assembly is included for fixing the developed toner image to the receiver, to form a fused toner image on the receiver. An endless transport member is provided for transporting the receiver to or from the fuser assembly, the transport member having a substrate bearing an oil-absorbing porous layer that would tribocharge positively upon contact with negatively charged toner particles, and a porous overcoat outermost layer that does not tribocharge positively upon contact with negatively charged toner particles.

Abstract: A system for charging a photoreceptor (3) includes a first corona charging unit (2) a first corona electrode (4), a first shell electrode (6), and a first high voltage power supply (22). The shell electrode is connected through a resistor to ground and the high voltage power supply is connected to the first corona electrode. A second corona charging unit (10) has a second corona electrode (12), and a first grid electrode (14) connected to a second shell electrode (16). A first corona current from the first high voltage power supply to the first corona electrode and a return current from the first shell electrode to ground is sensed and a voltage on the high voltage power supply is adjusted to maintain a constant difference. The first corona charging unit charges the photoreceptor to at least 63% of the desired voltage.

Abstract: A method of charging a photoreceptor (3) includes a first corona charging unit (2) a first corona electrode (4), a first shell electrode (6), and a first high voltage power supply (22). The shell electrode is connected through a resistor to ground and the high voltage power supply is connected to the first corona electrode. A second corona charging unit (10) has a second corona electrode (12), and a first grid electrode (14) connected to a second shell electrode (16). A first corona current from the first high voltage power supply to the first corona electrode and a return current from the first shell electrode to ground is sensed and a voltage on the first high voltage power supply is adjusted to maintain a constant difference. The first corona charging unit charges the photoreceptor to at least 63% of the desired voltage and the second corona charging unit charges the photoreceptor to within 10% of the desired voltage.

Abstract: A system for charging an insulating object on a static dissipative surface with a constant current includes a corona electrode in close proximity to the insulating surface; a shell electrode in close proximity to the corona electrode; a high voltage power supply connected to the corona electrode; wherein the potential of the shell electrode is raised to at least one tenth the magnitude of the potential of the corona electrode; sensing a first current from the high voltage power supply to the corona electrode; sensing a second current from the shell electrode to ground; and adjusting a voltage on the high voltage power supply to maintain a constant difference between the first current and the second current.

Abstract: A method for charging a static dissipative object on an insulating surface with a constant current includes placing a corona electrode in close proximity to the static dissipative object; placing a shell electrode in close proximity to the corona electrode; connecting a high voltage power supply to the corona electrode; raising the potential of the shell electrode to at least one tenth the magnitude of the potential of the corona electrode; sensing a first current from the high voltage power supply to the corona electrode; sensing a second current from the shell electrode to ground; and adjusting a voltage on the high voltage power supply to maintain a constant difference between the first current and the second current.

Abstract: A method for charging an insulating object on a static dissipative surface with a constant current includes placing a corona electrode in close proximity to the insulating object; placing a shell electrode in close proximity to the corona electrode; connecting a high voltage power supply to the corona electrode; placing a counter electrode on a side of the static dissipative surface opposite the corona electrode; maintaining the counter electrode at a constant potential; raising the potential of the shell electrode to at least one tenth the magnitude of the potential of the corona electrode; sensing a first current from the high voltage power supply to the corona electrode; sensing a second current from the shell electrode to ground; and adjusting a voltage on the high voltage power supply to maintain a constant difference between the first current and the second current.

Abstract: A system for charging an insulating object on a static dissipative surface with a constant current includes a corona electrode in close proximity to the insulating surface; a shell electrode in close proximity to the corona electrode; a high voltage power supply connected to the corona electrode; wherein the potential of the shell electrode is raised to at least one tenth the magnitude of the potential of the corona electrode; sensing a first current from the high voltage power supply to the corona electrode; sensing a second current from the shell electrode to ground; and adjusting a voltage on the high voltage power supply to maintain a constant difference between the first current and the second current.

Abstract: An intermediate transfer member for electrophotography includes a substrate and a non-ceramer polyurethane compliant layer. Disposed directly on the compliant layer is an outermost surface layer consisting essentially of a non-particulate, non-elastomeric ceramer or fluoroceramer and nanosized inorganic particles that are distributed within the non-particulate ceramer or fluoroceramer in an amount of at least 5 and up to and including 50 weight % of the outermost surface layer. This intermediate transfer member can be incorporated into a suitable imaging apparatus for forming a toned image on a receiver element.

Abstract: A system for joining a first sheet (10) to a second sheet (11), wherein the first and second sheets have a first layer and a second layer, including a first rigid plate (6); a gas absorbing layer on the first rigid plate; positioning the second sheet having a first layer (52) and a second layer (54) on the gas absorbing layer (8); wherein an edge of the of the first sheet abuts an edge of the second sheet; a second rigid plate on top of the first and second sheet; a press for applying pressure to the first sheet edge and second sheet edge; and a laser for welding the edge of the first sheet to the edge of the second sheet through the second rigid plate.

Abstract: A method for joining a first sheet (10) to a second sheet (11) includes providing a first rigid plate (6); providing a gas absorbing layer on the first rigid plate; positioning the first sheet, the first sheet has at least a first layer (52) and a second layer (54), on the gas absorbing layer (8); positioning the second sheet, wherein the second sheet has at least a first layer and a second layer, on the gas absorbing layer; wherein an edge of the of the first sheet abuts an edge of the second sheet; placing a second rigid plate on top of the first and second sheet; wherein the second rigid plate is transparent; applying pressure to the first sheet edge and second sheet edge; and laser welding the edge of the first sheet to the edge of the second sheet with a first laser through the second rigid plate.

Abstract: The use of electrographic printing to prepare prints which have a desired tactile feel or raised information in a controlled manner by utilizing a developer having toner particle size larger than 50 microns volume average diameter and carrier particles larger than the toner particle size such that the volume average distribution overlap between the toner distribution curve and carrier particle distribution curve is less than 35% and the carrier and toner particles have a volume average diameter size differential equal to or greater than 5 microns or the ratio of carrier-to-toner volume average diameter exceeds 1.25.

Abstract: A method of removing charge from a charged sheet prior to stacking the charged sheet is disclosed. The method includes moving the charged sheet through a set of nipped rollers while a first roller has an AC voltage applied thereto so that a first side of the charged sheet is in contact with the first roller and has its charge substantially dissipated, whereby charge substantially remains on a second side of the charged sheet in contact with a second roller. The method further includes using at least one non-contact charge removal device to remove charge from the second side of the charged sheet, and stacking the discharged sheet.

Abstract: An intermediate transfer member for electrophotography includes a substrate and a non-ceramer polyurethane compliant layer. Disposed directly on the compliant layer is an outermost surface layer consisting essentially of a non-particulate, non-elastomeric ceramer or fluoroceramer and nanosized inorganic particles that are distributed within the non-particulate ceramer or fluoroceramer in an amount of at least 5 and up to and including 50 weight % of the outermost surface layer. This intermediate transfer member can be incorporated into a suitable imaging apparatus for forming a toned image on a receiver element.

Abstract: A method of removing charge from a charged sheet prior to stacking the charged sheet is disclosed. The method includes moving the charged sheet through a set of nipped rollers while a first roller has an AC voltage applied thereto so that a first side of the charged sheet is in contact with the first roller and has its charge substantially dissipated, whereby charge substantially remains on a second side of the charged sheet in contact with a second roller. The method further includes using at least one non-contact charge removal device to remove charge from the second side of the charged sheet, and stacking the discharged sheet.

Abstract: A method and system for printing adjustable gloss image documents using a variety of toners where some toners have a relatively low melt viscosity and others have a relatively high melt viscosity. These toners are co-printed prior to fixing, on the receiver proximate to and overlying at least a portion of each other.

Abstract: Printing of information with a distinct tactile feel can be accomplished by electrographic techniques. Such electrographic printing includes the steps of forming a desired print image, electrographically, on a receiver member utilizing standard size marking particles; and in areas of the formed print image, forming raised information by printing at least a first raised image and a second raised image. The print and raised images are fixing on the receiver member. The raised images are applied using toner particles having diameters substantially larger than the diameters standard size toner particles used for applying the print image.

Abstract: The present invention is a process for making an intermediate transfer member. The process includes forming an endless belt by seaming two ends of a substrate material to form a seam. A smoothing layer is applied on top of the endless belt using a rotary cast process wherein said intermediate transfer member has a continuous seamless top surface. In a preferred embodiment the endless belt is formed by adhering at least two layers of a substrate to form a belt having an inner and outer seam.