Xerox Corporation

Raymond W Stover

James R Larson

George Amos Gibson

Steven B Bolte

Edward Blair Caruthers

Timothy J Fuller

David H Pan

William H Wayman

Dan A Hays

Gerald M Fletcher

James Edward Williams

Frank C Genovese

Samuel Kaplan

Grace T Brewington

John S Berkes

Weizhong Zhao

Fred W Schmidlin

Michael G Swales

Ralph A Mosher

Paul Windsor Morehouse, Jr

Oscar G Hauser

William M Prest, Jr

Rasin Moser

Robert G Martin

Robert W Anderson

Lawrence M Hart

Anita C VanLaeken

Christine J Tarnawskj

An image data adjustment system is described which adjusts image data to be printed based upon the level of contaminants detected in the toner reservoirs. The system detects the level of contamination of a toner to be printed and adjusts the image data so that a compensating toner is also printed with the desired toner so that an intended print color is achieved despite contaminants in the toner.

Systems and method for adjusting image data to compensate for

A blotter/charging device is provided for simultaneously removing excess liquid carrier from a developed toner image and recharging a photoreceptor in preparation for generating and developing another electrostatic latent image on the photoreceptor. The blotter/charging device is useful for all types of liquid developing systems that generate two or more toner images on a photoreceptor, including image-next-to-image, image-on-image, highlight and other types of systems. A method is also provided for generating a plurality of toner images on a support wherein excess liquid carrier is removed from a developed toner image simultaneous with recharging of the support in preparation for generating and developing a second electrostatic image on the support.

Image conditioning/recharge apparatus for electrostatic printing systems

A liquid developer composition including: a resin, a colorant, a liquid carrier vehicle, and a cake inducing agent.

Liquid developers and processes thereof

An AC recharging device is provided for recharging a photoreceptor in a liquid xerography system in preparation for generating and developing another electrostatic latent image on the photoreceptor. The AC recharging device is useful for all types of liquid developing systems that generate two or more toner images on a photoreceptor, including image-next-to-image, image-on-image, highlight and other types of systems. A method is also provided for recharging a support having a liquid developed image in preparation for generating and developing a second electrostatic image on the support.

AC recharge apparatus and method for electrostatic printing systems

A method and apparatus for reproducing color images on the electrophotographic printing machine with liquid developer, wherein there is enabled with such developers in embodiments excellent fixing characteristics especially when the developed image being in two distinct liquid phases is transferred from an intermediate substrate to the final substrate, such as paper. In embodiments of the present invention there is provided developers and processes for achieving high fix. The liquid developed image is concentrated to 30 to 45 percent solid by removing carrier liquid and thereafter heated on the intermediate substrate.

Method for transferring a liquid image

A liquid developing material replenishment system wherein an apparatus for developing an electrostatic latent image with a liquid developing material includes a liquid developing reservoir for providing a supply of operative liquid developing material to the developing apparatus, and a liquid developing material supply is coupled to the liquid developing material reservoir for providing a supply of liquid developing concentrate to the liquid developing material reservoir for replenishing the supply of operative liquid developing material in the liquid developing reservoir. A predetermined amount of operative liquid developing material is periodically and/or systematically discharged from the liquid developing material reservoir to remove contaminated liquid developing material from the reservoir. In addition, a predetermined amount of liquid developing material concentrate is systematically dispensed from the liquid developing material supply to the liquid developing material reservoir so as to extend the useful life of the operative liquid developing material therein.

Liquid developing material replenishment system and method

A Direct Electrostatic Printer including a vacuum drum for transporting copy sheets past a plurality of DEP printhead structures for selectively printing various types of images. For example, black only images, highlight color images or process color images may be printed. To this end there are provided a plurality of printheads each utilizing a different color toner. Each printhead structure may be selectively actuated depending upon whether its color is to be used in forming the final image. Thus, where a process color image is to be formed, all of the printheads may be actuated and where black images are to be created only the black printhead is actuated.

DEP apparatus for selectively creating monochrome highlight color or

An apparatus which develops an electrostatic latent image recorded on a photoconductive member with toner. Fluidized toner is transported from one end of the developer housing to the other end. An electrical bias is applied between the toner mover and the donor roller so as to attract toner to the donor roller. A rotating rod resiliently urged into contact with the donor roller charges and meters the toner on the donor roller. Electrically biased wires in the development zone between the photoconductive member and the donor roller detach toners from the donor roll so as to form a toner powder cloud in the development zone. Detached toner from the toner powder cloud develops the latent image.

Scavengeless development system having toner deposited on a doner roller

Single Pass Highlight Color (SPHLC) and Single Pass Custom Color (SPCC) images are made possible on a single print using relatively high development fields compared to the prior art. Three scavengeless development housings, one with the specified custom color toner, one with a highlight color toner, and one with black toner (or another color desired for non-highlight images) are utilized. The black development system has toner of one polarity, for example, positive. The two color systems both use negatively charged toner. Alternatively, the black toner may be negatively charged in which case the custom and highlight color toners would be positively charged.

Method and apparatus for producing single pass highlight and custom

In an ionographic device projecting a stream of ions towards a moving imaging surface, modulated in imagewise fashion, one or more control electrodes may be arranged adjacent to the path of the ion stream and between the source of the modulated ion stream and the imaging surface, biased with a voltage preventing previously deposited charge from perturbing the trajectory of subsequently projected ions to limit the amount of ion beam deflection caused by the presence of electrostatic charge patterns on the electroreceptor.

Method and apparatus for controlling ion trajectory perturbations in

An apparatus for charging insulating toner particles which comprises a charging roll, a transporting roll or donor belt, and a squirrel cage toner delivery device. A charging nip is situated between the charging roll and the transporting roll or donor belt, and the transporting roll or donor belt and the charging roll are charged to a predetermined potential. The rotating biased wire device in the form of a squirrel cage delivers toner particles from the toner housing to the charging nip. Subsequent to charging, the toner particles are delivered by the transporting roll or donor belt to the photoreceptor.

Single component development system with biased squirrel cage for

An apparatus is provided which limits the amount of developer that is presented to an electrostatic latent image to a width corresponding to the length of copy paper used. This particular apparatus and method apply to a development system which has a developer sump communicated to a magnetic transport means through a developer outlet at the lower end of the sump. During development functions, magnetic developer flows from the sump through the outlet to the magnetic transport means to be presented to the latent image. A plurality of magnetic gates are provided, each of which; may be swung into closed position adjacent the outlet to magnetically block flow of developer through that portion of the outlet corresponding to the length of the magnetic gate adjacent thereto. Each magnetic gate may also be swung into an open position which allows developer to flow through the outlet corresponding to the length of the magnetic gate adjacent thereto. Certain of the magnetic gates may be selectively located in open or closed position to allow developer to flow through the outlet over a length corresponding to the length of a copy sheet being utilized. All of the gates may be located in closed position when it is desired to stop all of developer flow through the outlet to puurge the developer systems.

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Webster, NY, United States of America

Raymond W Stover