Abstract: A method and system for printing documents with one or more embedded security features is provided. Security features are embedded in the document by co-printing magnetic and non-magnetic toner on a receiver before fixation by a fixing station. The combination of magnetic and non-magnetic toners in the image results in image elements that easily show alteration or are undetectable by visual means.

Abstract: A method of rendering the appearance of microprint contained within a printed input digital image comprised of an array of pixels and wherein each pixel is assigned a digital value representing marking information, the method comprising identifying one or two pixel lines or both and reassigning their digital value.

Abstract: A method and system for printing documents with one or more embedded security features is provided. Security features are embedded in the document by co-printing magnetic and non-magnetic toner on a receiver before fixation by a fixing station. The combination of magnetic and non-magnetic toners in the image results in image elements that easily show alteration or are undetectable by visual means.

Abstract: A method and system for printing documents with one or more embedded security features is provided. Security features are embedded in the document by co-printing magnetic and non-magnetic toner on a receiver before fixation by a fixing station. The combination of magnetic and non-magnetic toners in the image results in image elements that easily show alteration or are undetectable by visual means.

Abstract: The invention relates to printing of documents, for example bank checks. According to the various aspects of the invention, a printing system, process and product with microprinting are provided. Documents printed as described may include digitally variable microprint and other enhancements. The invention is particularly useful for enhanced security documents and the production thereof.

Abstract: A method and system for printing documents with one or more embedded security features is provided. Security features are embedded in the document by co-printing magnetic and non-magnetic toner on a receiver before fixation by a fixing station. The combination of magnetic and non-magnetic toners in the image results in image elements that easily show alteration or are undetectable by visual means.

Abstract: A method and system for printing documents with one or more embedded security features is provided. Security features are embedded in the document by co-printing first and second toner on a receiver before fixation by a fixing station. The combination of first and second toners in the image results in image elements that easily show alteration or are undetectable by visual means.

Abstract: The invention relates to printing of documents, for example bank checks. According to the various aspects of the invention, a printing system, process and product with microprinting are provided. Documents printed as described may include digitally variable microprint and other enhancements. The invention is particularly useful for enhanced security documents and the production thereof.

Abstract: The invention relates to the field of two component magnetic brush development of electrographic images. According to one aspect of the invention, a method of processing a developer is provided for developing an electrostatic image wherein a set developer is exercised with a blender prior to using the developer for developing the electrostatic image. According to a further aspect of the invention, the developer comprises ferromagnetic toner and hard magnetic carriers.

Abstract: Development systems and methods for developing using magnetic toner are disclosed. The present invention further discloses developers used in development systems as well as the toner used in developer for magnetic ink character recognition printing. With respect to the development system, a development system is disclosed which includes a supply of dry developer mixture which contains magnetic toner particles and hard magnetic carrier particles. The development system further includes a non-magnetic, cylindrical shell for transporting the developer between the supply and the development zone, wherein the shell can be rotatable or stationary. A rotating magnetic core of a pre-selected magnetic field strength and means for rotating at least the magnetic core to provide for the transport of the toner particles from the shell to an electrostatic image also provided as part of the development system.

Abstract: An electrographic printing machine (10) operable in combination with an installed one of a plurality of developing, or toning, stations (38a, 38b), is disclosed. Each of the plurality of toning stations (38a, 38b) is associated with a toner type, with one of the toning stations (38a) associated with Magnetic Ink Character Recognition (MICR) toner. Each toning station (38a, 38b) has an indicator (50), for example a resistor, that can be interrogated or measured by the printing machine (10) when installed, so that the printing machine (10) is aware of the type of toner to be used. If a MICR toning station (38a) is installed, a set of process setpoints and parameters are used that optimize MICR printing; if a normal toning station (38b) is installed, a different set of process setpoints and parameters adapted for the normal toner is used.

Abstract: Development systems and methods for developing using magnetic toner are disclosed. The present invention further discloses developers used in development systems as well as the toner used in developer for magnetic ink character recognition printing. With respect to the development system, a development system is disclosed which includes a supply of dry developer mixture which contains magnetic toner particles and hard magnetic carrier particles. The development system further includes a non-magnetic, cylindrical shell for transporting the developer between the supply and the development zone, wherein the shell can be rotatable or stationary. A rotating magnetic core of a pre-selected magnetic field strength and means for rotating at least the magnetic core to provide for the transport of the toner particles from the shell to an electrostatic image also provided as part of the development system.

Abstract: An electrographic development machine that utilizes magnetic toner particles includes a dielectric film member for carrying an electrostatic image thereon. A toner roller is disposed upon a first side of the dielectric film member. The toner roller has a core and an outer shell. The core includes a plurality of toner roller magnets, each of which have a respective north and south pole. The toner roller magnets are disposed such that adjacent pairs thereof have poles of opposite polarity disposed proximate the shell. The toner roller provides the dielectric film member with a supply of developer material. The machine further includes means for altering or balancing the magnetic forces acting on the developer.

Abstract: Development systems and methods for developing using magnetic toner are disclosed. The present invention further discloses developers used in development systems as well as the toner used in developer for magnetic ink character recognition printing. With respect to the development system, a development system is disclosed which includes a supply of dry developer mixture which contains magnetic toner particles and hard magnetic carrier particles. The development system further includes a non-magnetic, cylindrical shell for transporting the developer between the supply and the development zone, wherein the shell can be rotatable or stationary. A rotating magnetic core of a pre-selected magnetic field strength and means for rotating at least the magnetic core to provide for the transport of the toner particles from the shell to an electrostatic image also provided as part of the development system.

Abstract: An electrographic printing machine (10) operable in combination with an installed one of a plurality of developing, or toning, stations (38a, 38b), is disclosed. Each of the plurality of toning stations (38a, 38b) is associated with a toner type, with one of the toning stations (38a) associated with Magnetic Ink Character Recognition (MICR) toner. Each toning station (38a, 38b) has an indicator (50), for example a resistor, that can be interrogated or measured by the printing machine (10) when installed, so that the printing machine (10) is aware of the type of toner to be used. If a MICR toning station (38a) is installed, a set of process setpoints and parameters are used that optimize MICR printing; if a normal toning station (38b) is installed, a different set of process setpoints and parameters adapted for the normal toner is used.

Abstract: Magnetic toner particles are disclosed. The magnetic toner particles contain at least one polymeric binder and at least one magnetic additive, wherein the surface of the toner particle contains particles of positively chargeable inorganic fine powder particles. The inorganic fine powder particles have a mean volume average particle size of from about 0.5 to about 7 &mgr;m, and a cleaning ratio of from about 0.1 to about 5.0 and a cleaning ratio being the volume fraction of particles between 0 and 1.0 &mgr;m, divided by the volume fraction of particles greater than 1.0 &mgr;m; and the toner particles having on the surface thereof a flowability improving agent having a BET surface area of at least about 30 m2/g. Methods of forming electrostatic images are further disclosed. Also, images formed from the magnetic toner particles are further disclosed and have excellent character void frequency, total void area, and suitable magnetic signal strengths.

Abstract: A method for reducing rub-off from a substrate having a front side and a back side with at least one side bearing a toner image by depositing a substantially clear phase change composition on the toner image bearing side of the substrate by depositing the phase change composition onto a rotary brush in contact with the substrate using an ink jet printer with the phase change composition being transferred from the brush to the substrate in an amount sufficient to reduce rub-off from the toner image bearing side. An ink jet printer and a second rotary brush may be also used to deposit a clear phase change composition to an image bearing backside of the substrate.

Abstract: Development systems and methods for developing using magnetic toner are disclosed. The present invention further discloses developers used in development systems as well as the toner used in developer for magnetic ink character recognition printing. With respect to the development system, a development system is disclosed which includes a supply of dry developer mixture which contains magnetic toner particles and hard magnetic carrier particles. The development system further includes a non-magnetic, cylindrical shell for transporting the developer between the supply and the development zone, wherein the shell can be rotatable or stationary. A rotating magnetic core of a pre-selected magnetic field strength and means for rotating at least the magnetic core to provide for the transport of the toner particles from the shell to an electrostatic image also provided as part of the development system.

Abstract: Development systems and methods for developing using magnetic toner are disclosed. The present invention further discloses developers used in development systems as well as the toner used in developer for magnetic ink character recognition printing. With respect to the development system, a development system is disclosed which includes a supply of dry developer mixture which contains magnetic toner particles and hard magnetic carrier particles. The development system further includes a non-magnetic, cylindrical shell for transporting the developer between the supply and the development zone, wherein the shell can be rotatable or stationary. A rotating magnetic core of a pre-selected magnetic field strength and means for rotating at least the magnetic core to provide for the transport of the toner particles from the shell to an electrostatic image also provided as part of the development system.

Abstract: A method for reducing rub-off from a substrate having a front side and a back side with at least one side bearing a toner image by depositing a substantially clear phase change composition on the toner image bearing side of the substrate by depositing the phase change composition onto a rotary brush in contact with the substrate using an ink jet printer with the phase change composition being transferred from the brush to the substrate in an amount sufficient to reduce rub-off from the toner image bearing side. An ink jet printer and a second rotary brush may be also used to deposit a clear phase change composition to an image bearing backside of the substrate.