Xerox Corporation

Fan Shi

Eliud Robles Flores

Patricia Joanne Donaldson

David Clark Craig

Yu Qi

Shen-Ge Wang

Eric Michael Gross

Mark A Scheuer

Brian Robert Conrow

Mark A Jackson

Eliud Robles-Flores

Judith M Vandewinckel

William G Osbourne

Chunliang Lu

John M Scharr

Tara L Hunter

William B Willard

A fluorescent yellow toner including a core comprising a first solvent yellow 160-incorporated amorphous polyester; a second solvent yellow 160-incorporated amorphous polyester; wherein the first amorphous polyester and the second amorphous polyester are different; and a crystalline polyester; a shell disposed over the core, the shell comprising at least one amorphous polyester; wherein the toner provides printed images having an L* value of greater than 90, an a* value of from about less than −40 to about −20, and a b*value of greater than 75. A process of printing the fluorescent yellow toner.

High visibility fluorescent yellow toner and toner process

Methods of making fluorescent pink toners are provided which comprise forming one or more fluorescent latexes which comprise a red fluorescent agent, a yellow fluorescent agent, a first type of amorphous resin, and a second type of amorphous resin, wherein the first and second types of amorphous resins are present at a ratio in a range of from 2:3 to 3:2; forming a mixture comprising the one or more fluorescent latexes; one or more emulsions which comprise a crystalline resin, the first type of amorphous resin, the second type of amorphous resin; and optionally, a wax dispersion; aggregating the mixture to form particles of a predetermined size; forming a shell over the particles of the predetermined size to form core-shell particles; and coalescing the core-shell particles to form a fluorescent pink toner. Fluorescent pink toners and methods of using such toners are also provided.

Fluorescent pink toners and related methods

A printing system receives a print request containing patterns of marks to be printed on print media to produce printed output. A processor evaluates the print request to identify non-marking areas and identify different printing densities of the patterns of marks. The processor alters the patterns of marks to create hidden features on the printed output by adding a uniform printed background to the non-marking areas and adding different printing densities of fluorescent spots to different areas of the patterns of marks. The different printing densities of the fluorescent spots are based on the different printing densities of the patterns of marks and on the size of the hidden features. A printing device prints the print request on the print media to produce the printed output.

Security marks based on print job image with uniform printed background

What is disclosed is a system and method for efficiently and accurately estimating the complete TRC for a color marking device equipped with a multi-center cluster halftone screen which has a similar halftone tiling geometry and a similar growth specified by a corresponding single-center cluster halftone screen. The present method introduces a cluster-based printer model which establishes a relationship between a color output of a single-center cluster halftone screen and a color output of a multi-center cluster halftone screen. The present cluster-based printer model determines the complete TRC for the multi-center cluster halftone screen using the measurements for the single-center cluster halftone screen. Results of halftone dot linearization with different printing devices demonstrates that high accuracy can be achieved using the reduced measurements from the single-center cluster halftone screen. The present method finds its uses in characterization processes for a wide variety of color marking devices known in the arts.

Cluster-based printer model for tone reproduction curve estimation

A marking device is controlled to mark a media sheet with halftone dots selected from a set of image halftone dot representations. The marking device is controlled to mark a monitored surface with halftone dots selected from a set of control halftone dot representations to form test patches of different nominal marking densities. Measured marking densities are acquired using a density sensor for the test patches marked on the monitored surface. The set of control halftone dot representations is updated based on the measured marking densities and the nominal marking densities.

Tone reproduction curve linearization

A method of controlling an actuator includes determining a function of an actuator value based on a cost function index that represents a relationship between a tone reproduction curve error and the actuator value necessary to achieve a tone reproduction curve target, determining an actual tone reproduction curve error from an obtained sample of a tone reproduction curve and controlling the actuator based on the function and actual tone reproduction curve error to move to a point that represents the tone reproduction curve target. A Xerographic system includes an actuator, an input device that inputs the cost function index and a controller that controls the Xerographic system to obtain the sample, determine an actual tone reproduction curve error from the sample, and control the actuator based on the cost function index and the actual tone reproduction curve error to move to a point that represents the tone reproduction curve target.

Tone reproduction curve (TRC) target adjustment strategy for actuator set points and color regulation performance trade off

Systems and methods for measuring and setting grid voltages in an image forming device may include setting a first charging device of a first image forming station to a first voltage level and setting a second charging device of the first image forming station to be off; charging a charge-retentive surface with the first charging device set at the first voltage level; measuring and the charge imparted to the charge-retentive surface by the first charging device; storing the measured charge value. Systems and methods may further include repeating the setting, charging, measuring and storing steps for the first charging device for at least one additional voltage level; and determining at least one parameter of the first charging device based on the stored measured charge values for the first charging device for each voltage level.

Growing community of inventors

Penfield, NY, United States of America

Fan Shi