Eastman-kodak Company

Thomas M Plutchak

John F Crichton

Jerry Alan Pickering

Alan Richard Priebe

Joseph Y Kaukeinen

Lawrence E Contois

Susan C Baruch

Gregory Rombola

Jeffrey C Blood

Theodora Miller

Leonard R Christopher

John R Lawson

Stephen Michel

Jeffrey S Baker

A method for verifying the authenticity of a document utilizes artifacts of the printing process. The method includes optically capturing at a predetermined magnification a first image of an indicia printed on the authentic document. A corresponding indicia on a document to be authenticated is optically captured at a predetermined magnification. The captured images and the printing process artifacts depicted therein are characterized. Authenticity is verified where the characterization indicates the captured images are sufficiently identical. An indication is issued as to whether the document is authentic.

Method and apparatus for verifying the authenticity of documents

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

A layer for an article, including a fluoroelastomer, and at least about 25 percent by volume nonfibrillatable and autoadhesive plastic particles.

Layer comprising nonfibrillatable and autoadhesive plastic particles, and method of preparation

The present invention is in the field of electrophotographic printers and copiers. More specifically this invention relates to the fuser apparatus used to fuse an image on a receiving sheet. According to just one aspect of the invention, an apparatus and process for fixing toner images to a receiving sheet is provided. The apparatus may include a fuser having a run condition and an idle condition, the fuser having a fuser roller, a fuser roller heater, and a fuser temperature sensor which inputs to a logic and control system which controls the heating of the fuser roller heater. The fuser roller may be cooled during or after the idle condition, prior to the first receiving sheet entering the fuser. The fuser roller has end portions and a middle portion, and the middle portion may be cooled relative to said end portions. Additional aspects and representative embodiments are described herein.

Method and apparatus for selective fuser rolling cooling

A class of organic pigments having the formula ##STR1## wherein X consists of the atoms necessary to complete a naphthalene, anthracene, or ##STR2## ring; R.sup.1, R.sup.2, and R.sup.3 are hydrogen, halogen, alkoxy, NO.sub.2, alkyl, SO.sub.3 H or alkali metal salts thereof, ##STR3## and COOH or alkali metal salts thereof, and R.sup.2 and R.sup.3 can comprise the atoms necessary to complete a phenyl, naphthyl or anthryl ring; and R is selected from the group consisting of ##STR4## where M is alkyl, alkali or alkaline earth metal are useful as sensitizers for photoconductive compositions in electrophotographic processes.

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Hilton, NY, United States of America

Thomas M Plutchak