Xerox Corporation

Other

Aetas Technology Corporation

Vencraft Corporation

Standard Products Corporation

Robert W Gundlach

Richard F Bergen

Christopher R Snelling

Maura A Sweeney

Kurt B Gundlach

Luis A Sanchez

Joseph A Chizuk

David H Perry, Deceased

William H Wayman

Dale Robert Mashtare

Peter A Crean

James D Rees

William Mey

William M Schwarz

Henry R Till

Lloyd F Bean, Ii

Richard G Crystal

Eric G Rawson

Ronald E Godlove

Man C Tam

Jerome E May

Arnold L Pundsack

Frederick W Hudson

Remo J D'Ortenzio

Charles A Whited

Thomas W Pike

George R Simpson

Anthony C Fornalik

Joseph A Chizuk, Jr

Frank T Lippolis

John E Cranch

Gordon C Butler

Kenneth W Gunther

Thermal energy storage system

A process for creating an image with improved quality and durability by depositing an ink image onto a toner composition residing on a substrate.

Color printing apparatus and processes thereof

In one corona charging arrangement described in the specification, a coronode supplied with AC voltage is contacted by an insulating member in the form of a mesh of insulating filaments or an imperforate dielectric insulating member or filaments wound around an insulating member and retaining the coronode in fixed position with respect to the insulating member. In another embodiment, the insulating member is a layer of dielectric material coated on a coronode in the form of a corona wire and a capacitor is connected between the AC voltage source and the coronode. By providing an insulating structure for a coronode and applying a DC biased AC voltage to the coronode, improved charging efficiency with respect to prior art arrangements is obtained while reducing generation of ozone and nitrates and increased charging currents are obtained to provide high charging rates without arcing.

DC biased AC corona charging

An AC corona charging arrangement includes a corona generating device connected through a capacitive connection to an AC voltage source and partially surrounded by a conductive shield connected to DC voltage source. In one embodiment the corona generating device is a wire having a diameter of about 50 microns and in another embodiment the corona generating device is a row of pins connected through corresponding capacitance to the AC voltage source. The presence of a capacitance between the AC voltage source and the corona generating device provides a curve representing the relationship between the current between the charging device and an adjacent conductive plate and the shield voltage which is concave downwardly, resulting in a high charging rate and greater uniformity of charging of a photoreceptor surface.

AC corona charging arrangement with current&mdash;limiting capacitor

Electrorheological based acoustic droplet ejectors and their applications in acoustic print heads are described. The droplet ejectors include an acoustic transducer which generates acoustic energy into a fluid well holding an electrorheological fluid such that the fluid's free surface is adjacent electric field electrodes. The acoustic energy is such that droplets are ejected from the fluid as long as a lower voltage is applied to the electrodes. However, when a higher voltage is applied to the field electrodes, the electrodes produce an electric field through the fluid which causes the viscosity of the fluid to increase sufficiently that droplet ejection is prevented. When used in a print head, the electrorheological fluid is an ink. Further, many (perhaps thousands) of individual droplet ejectors are formed in the print head. By controlling droplet ejection from the individual print heads, an image can be produced on a recording medium.

Electrorheological based droplet ejecting printer

A migration imaging member includes a support substrate, a relatively thick dielectric spacer layer situated on the support substrate, and a softenable layer situated on the dielectric spacer layer, with the softenable layer including a softenable material, and a migration marking material situated at or near the surface of the softenable layer farthest spaced from the support substrate.

Verdefilm for more uniform charging

A method and apparatus for reproducing color images using a non-interactive pyroelectric imaging process is disclosed. More specifically, the present invention is used to generate multiple layers of toner on the top surface of a pyroelectric imaging member without physical contact to the imaging member top surface. The ability to generate a composite image with different materials in this manner enables printing machines to use a pyroelectric imaging process to generate color images in the image on image (I-O-I) mode.

Method of creating multiple electrostatic latent images on a

A single piece, planar, integral corona generating device that applies a uniform charge to a charge retentive surface, including a dielectric layer, corona producing element formed on one side of the dielectric layer, reference electrode positioned on the other side of the dielectric layer, for controlling the charge level placed on the charge retentive surface by the corona producing element, for applying a low DC voltage to the reference electrode; and AC high voltage connected to the corona producing element for applying sufficient voltage to the corona producing elements so that ions are emitted from the reference electrode.

Corona generating device

A charging apparatus that prevents fogging due to light generated by a corona source. The charging apparatus includes two offset reference electrodes lying in separate horizontal planes or a light eclipsing element positioned between a corona source and an electrode member.

Light blocking ion charging apparatus

An ionographic printer directs a stream of ions from a source to a charge receptor to create an electrostatic latent image thereon. The ion stream passes through a relatively large aperture having associated therewith a focusing pinch electrode for narrowing the ion stream to a preselected width, displacing electrodes for positioning the narrowed ion stream within the aperture, and focus electrodes. Varying the biases of the displacing electrodes causes the ion stream to scan across the aperture to deposit multiple spots of charged areas at desired locations on the receptor. Varying the biases of the focus electrodes cures positional and ion-stream cross-section anomalies.

Ionographic printing with a focused ion stream controllable in two

A multi-color printer using a stretch toner release development system to provide either partial or full color copies with minimal degradation of developed toner patterns by subsequent over-development with additional colors and minimal back contamination of developer materials. Multiple scanning beams, each modulated in accordance with distinct color image signals, are scanned across the printer's photoreceptor at relatively widely separated points, there being a buffer provided to control timing of the different color image signals to assure registration of the color images with one another. Each color image is developed prior to scanning of the photoreceptor by the next succeeding beam. After developing of the last color image, the composite color image is transferred to a copy sheet. Development is accomplished by stretching the surface of a toner carrying member and thereby reducing the net force of adhesion of toner to the surface of the toner carrying member.

Color printing system employing non-interactive development

A printing machine adapted to print an image on a plurality of different predefined sized sheets, including an imaging member adapted to receive the image on a plurality of predefined image areas on the surface of the imaging member. A selector is provided for selecting one of the plurality of different predefined sized sheets to be printed on. And, a corona generating device is provided for charging only one of the plurality of different predefined image areas associated with the one of the plurality of different predefined sized sheets selected.

Charging device for charging in one of a plurality of predefined image

The present invention is a method and apparatus for printing using an intermediate member acting as a receptor for marking particles representing an image. The marking particles may be deposited directly or indirectly on the member, after which time the member is exposed, via an internal heat source, to an elevated temperature sufficient to cause the melting and coalescing of the marking particles. Subsequently, the intermediate member is advanced so as to place the tackified marking particles present on the outer surface thereof into intimate contact with the surface of a recording sheet.

Method and apparatus for imaging on a heated intermediate member

An ionographic printer directs a stream of ions from a source to a charge receptor to create an electrostatic latent image thereon. The ion stream passes through a relatively large aperture having associated therewith a pinch electrode for narrowing the ion stream to a preselected width, and displacing electrodes for positioning the narrowed ion stream within the aperture. Varying the biases of the displacing electrodes causes the ion stream to scan across the aperture to deposit multiple spots of charged areas at desired locations on the receptor. The electrodes can be designed to compensate for spot placement skew and anomalies in the cross-sectional shape of the displaced ion stream.

Apparatus for ionographic printing with a focused ion stream

Growing community of inventors

Victor, NY, United States of America

Robert W Gundlach