Eastman-kodak Company

Heidelberger Druckmaschinen Ag

Nexpress Solutions, Inc.

John F Crichton

Eric C Stelter

Robert D Fields

Thomas A Jadwin

Matthias Hermann Regelsberger

Gregory Rombola

Dana G Marsh

Timothy Gilbert Armstrong

Jason Morgan

Thomas M Plutchak

Raymond Rossborough

David Daniel Putnam

Thomas J Foster

Jeffrey C Blood

John C Fournier

Gerald L Kelly, Iii

Leonard R Christopher

Robert E Contois

Jeffrey S Baker

Thomas J Benedetto

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.

Secure document printing method and system

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.

Post rip image rendering for microprinting

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.

Printing system, process, and product with microprinting

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.

Method and apparatus for reducing densification of multiple component electrographic developer

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. A method for developing electrostatic image with magnetic toner is further disclosed, for example, involving the above-described development system. Magnetic toner particles having a low magnetic loading such as on the order of 28% by weight or less, based on the weight of the toner are further described wherein these magnetic toners can include a spacing agent on the surface of the magnetic toner particles. A developer is further disclosed which contains the magnetic toner particles of the present invention with hard magnetic carrier particles. Other developer compositions are also described.

Development systems for magnetic toners and toners having reduced magnetic loadings

An electrographic printing machine () operable in combination with an installed one of a plurality of developing, or toning, stations (), is disclosed. Each of the plurality of toning stations () is associated with a toner type, with one of the toning stations () associated with Magnetic Ink Character Recognition (MICR) toner. Each toning station () has an indicator (), for example a resistor, that can be interrogated or measured by the printing machine () when installed, so that the printing machine () is aware of the type of toner to be used. If a MICR toning station () is installed, a set of process setpoints and parameters are used that optimize MICR printing; if a normal toning station () is installed, a different set of process setpoints and parameters adapted for the normal toner is used. Also in response to detecting that the MICR toning station () is installed, the printing machine () enables certain security functions, such as privilege-level control of MICR fonts and secure files, and also such as disabling features such as automatic reprinting.

Functionality switching for MICR printing

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 m /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. Developers containing the magnetic toner particles of the present invention are also disclosed.

Single component toner for improved magnetic image character recognition

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.

Method for reducing rub-off from a toner image using a phase change composition with a rotary brush

Development systems for magnetic toners having reduced magnetic loadings

A bottle for collecting untransferred developer material and debris cleaned from a dielectric member of a reproduction apparatus. The collection bottle is a container having an opening adapted to receive untransferred developer material and debris therethrough for storage within the container. The container is made of a conductive material. The conductive material is a carbon-doped plastic having a volume resistivity of less than 10 omhs cms with the carbon dopent being approximately 15-20% by weight. The container is coupled to electrical ground via an electrical tap, whereby static charge build-up is substantially prevented.

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Honeoye Falls, NY, United States of America

John F Crichton