Xerox Corporation

Weizhong Zhao

Chu-Heng Liu

David H Pan

Christopher M Knapp

John W Spiewak

Paul Windsor Morehouse, Jr

Thomas W Smith

Samuel Kaplan

William M Prest, Jr

Chu-heng Liu

Timothy J Fuller

Constance J Thornton

Shu Chang

Ralph A Mosher

Edward B Caruthers, Jr

Raymond W Stover

Stewart W Volkers

John Chinnici

Anita C VanLaeken

Terry D Seim

Scott W Wolff

Liquid developers and processes thereof

An imaging system for effecting electrostatic printing of an image, wherein the imaging system includes an electrostatic printing engine operable in a novel fashion upon a copy substrate, for imaging and development of an electrostatic latent image representative of the image, and subsequently transfers the developed image to the copy substrate. A quantity of low solids content liquid developing material is subject to compression in a process nip such that the concentration of marking particles therein increases and the concentration of carrier fluid decreases. A toner cake layer is thereby formed in the process nip, and is used for development of the electrostatic latent image in a development zone situated in the process nip.

Method and apparatus for formation and development of high solids content toner cake in an electrostatic printing system

Imaging apparatus

An imaging system for effecting electrostatic printing of an image, wherein the imaging system includes at least one contact electrostatic printing engine operable in a novel fashion upon a copy substrate, for imaging and development of a latent image representative of the image, and subsequent transfer of the developed image to the copy substrate. The developed image is created by separating and selectively transferring portions of a high solids content secondary toner cake layer in correspondence with the image and non-image regions of the latent image. A toner cake layer delivery apparatus draws from a supply of high solids content liquid developing material to form a primary toner cake layer on a receiving surface of a receiving member. The primary toner cake layer is subject to uniform charging to a first polarity followed by an induced charge of a second, opposing polarity to a selectable depth. The primary toner cake layer is brought into pressure contact at a process nip with an electrically-biased donor surface of movable coating member. Separation of the donor surface and the receiving surface causes the primary toner cake layer to be separated into inner and outer layers. The outer layer is transferred to the donor surface and the inner layer remains on the receiving surface. The inner layer may then be used as the secondary toner cake layer, which features a high solids content, a uniform thickness, and an accurately metered mass per unit area.

Method and apparatus for toner cake delivery

A liquid developer comprised of a nonpolar liquid, resin, optional colorant, and an alkaline earth charge acceptance additive.

Developer compositions and processes

A low cost process multicolor image reproduction machine includes a rotatable endless toner image receiving and transfer member for cyclically building up a multicolor image from a plural number of received color separation toner images; a sheet handling system including a back up roller defining a toner image transfer nip against the rotatable endless toner image receiving and transfer member; a rotatable photoreceptor member forming a contact electrostatic printing (CEP) nip with the rotatable endless toner image receiving and transfer member for separating toner image areas from toner background areas of a color separation toner image formed on the photoreceptor member; imaging devices for cyclically forming a plural number of color separation toner images on the photoreceptor member, and a controller for controlling formation of, and build up into a multicolor toner image, of the plural number of color separation images, as well as, transfer of the multicolor toner image onto a copy sheet.

Low cost process multicolor image reproduction machine

A liquid developer comprised of a nonpolar liquid, thermoplastic resin, optional colorant, and an alumina charge acceptance additive.

The efficient contact transfer of liquid toner images is obtained by using an absorbent coating material over an image bearing member. The absorbent coating material absorbs carrier fluid from a developed image. By absorbing carrier fluid from the developed image the internal cohesiveness of the image increases and the adhesion of the image to the next substrate increases.

Absorbent coating for contact transfer of liquid toner images

The methods and systems for efficiently transferring images from an image bearing member include placing a release layer over the image bearing member before placing the toner layer over the release layer. The release layer reduces the adhesiveness of the toner layer to the image bearing member and, therefore, promotes efficient transfer to another substrate without applying heat. Release layer materials include, for example, a clear toner layer, a clear fluid layer and a wax layer.

Release layer for contact transferring liquid immersion developed images

Imaging system for effecting single pass, multicolor printing of a color image, wherein the imaging system includes a plurality of contact electrostatic printing engines operable in serial fashion upon a copy substrate, wherein each contact electrostatic printing engine images and develops a respective electrostatic latent image representative of a component of the color image, and subsequently transfers the developed component image to the copy substrate as the copy substrate proceeds in a single pass through the imaging system.

Single pass, multicolor contact electrostatic printing system

A liquid developer comprised of a nonpolar liquid, resin, colorant, and a cyclodextrin charge acceptance component.

An imaging system for effecting electrostatic printing of an image, wherein the imaging system includes at least one contact electrostatic printing engine operable in a novel fashion upon a copy substrate, for imaging and development of a latent image representative of the image, and subsequent transfer of the developed image to the copy substrate. The developed image is created by separating and selectively transferring portions of a high solids content secondary toner cake layer in correspondence with the image and non-image regions of the latent image. A toner cake layer delivery apparatus draws from a supply of high solids content liquid developing material to form a primary toner cake layer on a movable donor member. The primary toner cake layer is subject to uniform charging to a first polarity followed by an induced charge of a second, opposing polarity to a selectable depth. The primary toner cake layer is brought into pressure contact at a process nip with an electrically-biased surface of movable receiving member. Separation of the donor surface and the receiving surface causes the primary toner cake layer to be separated into inner and outer layers. The outer layer is transferred to the receiving surface and the inner layer remains on the donor surface. At least one of the inner and outer layers may then be selected as a secondary toner cake layer having a high solids content, a uniform thickness, and an accurately metered mass per unit area.

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Webster, NY, United States of America

Weizhong Zhao