Xerox Corporation

Thomas Robson

Joseph Fantuzzo

Elton Tarik Ray

Louis D Mailloux

Edwin R Monkelbaan

Robert P Loce

Michael E Farrell

David C Robinson

Peter A Crean

David E Rumph

Mark A Smith

Michael Branciforte

Lawrence J Fraser

William Samuel Jacobs

John C Czudak

Daniel Fleysher

Hung M Pham

David B Mensing

Rosario A Bracco

Munir G Salfity

Farhad D Rostamian

James O Mitchel

Herbert H Ammenheuser

Michael L Campanella

Daniel D Truong

Cathleen J Raker

Cheryl A Pence

Robert R Thompson, Jr

Sue K Lam

Lyssa E Menard

Charles R Nail

Hoan N Nguyen

Eric J Thibodeau

Robert E Lyons

Gayle M Tyson

A lithographic printing method including exposing an imaging surface layer of a printing plate to a first expose source to render the surface layer uniformly hydrophilic; the surface layer comprising a compound having reversible light controlled wettability whereby the surface layer is reversibly hydrophilic and hydrophobic. The surface layer is disposed over a variable image portion of the printing plate imaging surface or disposed over substantially all of the printing plate imaging surface. The surface is exposed to a second expose source to render image areas of the surface layer hydrophobic. Polar liquid attracts to non-image hydrophilic areas. Hydrophobic liquid colorant attracts to hydrophobic image areas. The surface layer is contacted an offset receiving member and the image is transferred to an image receiving substrate.

Offset printing process using light controlled wettability

What is provided are a system, method, and computer program product for protecting information displayed on a fax confirmation page. Several embodiments are provided. In one embodiment, for example, a Gaussian kernel is used to blur the digitized image to be printed on the confirmation page. In one method, a large enough blur kernel is selected so that text of a certain size will be rendered illegible. A method is also provided wherein a copy of the first page of the faxed document used to provide the content to be displayed on the confirmation page of the faxed document is stored on a storage device. A character sequence which references the stored original content on the storage media is printed on the confirmation page. A new confirmation page can be reconstructed and printed if it is desirable to have the altered content made visibly legible. Various other embodiments are disclosed.

Method for protecting content of a fax confirmation sheet

A light controlled laser imaging method includes exposing a surface layer of an imaging member substrate to a first expose source to render the surface layer uniformly hydrophilic, wherein the surface layer comprises a compound having reversible light controlled wettability whereby the surface layer is reversibly hydrophilic and hydrophobic; exposing the surface layer to a second expose source in an image-wise fashion to render image areas of the surface layer hydrophobic; exposing the surface layer to a polar liquid wherein the polar liquid attracts to non-image hydrophilic areas; exposing the surface layer to a hydrophobic liquid colorant wherein the hydrophobic liquid colorant attracts to hydrophobic image areas; contacting the surface layer with an image receiving substrate to transfer the image thereto; fixing the image; and optionally, treating the surface layer to remove residual hydrophobic liquid colorant.

Laser printing process using light controlled wettability

The invention generates a page description language compliant data stream, that has been pre-designed and pre-processed to create unique and predictable page element ordering, overlay layout, and for splitting large page elements into multiple independent elements. In this way, multiple processors can be used to render the document without merging the data stream.

Systems and methods for rapid processing of raster intensive color documents

A method and apparatus for the control of darkness/lightness in a digital image rendered by a printing system. The technique preferably employs templates to selectively apply different amounts of darkening (lightening) to borders of structures detected within the image dependent upon the need for darkening (lightening).

Method and apparatus for digital image darkness control using quantized fractional pixels

The present invention is a method and apparatus for the fast rotation of binary images represented as a run length encoded data stream. The system employs a cache memory for efficiently representing parsed RLE data in a rotated orientation, where only the white-black transition points are recorded. Subsequently, the cache memory is further processed using a logic operation to fill in the runs between the recorded transition points during concurrent transfer of the image data to a band of page buffer memory. The process is repeated for a plurality of bands to complete the rotation/decoding process for an entire bitmap image.

Method and apparatus for the fast rotation of an image

The present invention is a method and apparatus for the efficient processing of binary images represented as a run length encoded data stream. The system employs a CPU and cache or other memory for efficiently scaling or scaling and rotating parsed RLE date. Subsequently, the scaled RLE data can be decoded to produce a scaled image bitmap.

Method and apparatus for the fast scaling of an image

There is provided a method of processing an input data stream including compressed image data in which an extended tree, characterized by a plurality of words, is developed. Each word is associated with a token set and the words are corresponded with the token sets, respectively, by way of, for example, a look-up table. In practice, a sample word, representing a portion of the compressed image data, is sampled from the input data stream and matched with a selected one of the words from the tree to obtain the token set corresponding with the selected one of the words. The compressed image data portion is then processed in accordance with the obtained token set.

Method for converting CCITT compressed data using a balanced tree

An image compensation system which provides dilation or erosion of image features using halfbitting or fullbitting in the rendition of bitmap images, especially on a write-white printer. A region of pixels of an image is isolated which includes two or more correctable pixel locations. A set of state determination rules, based on the formation of pixels in the isolated region, is used to determine a corrected binary pixel state for each of the correctable pixels. Corrections for one correctable pixel may be considered in the state determination rules for adjacent correctable pixels. A single enhanced output pixel is provided for each image input pixel, thereby preserving the original image resolution. Performing enhancements on multiple input pixels simultaneously increases the system throughput.

Dilation of images without resolution conversion to compensate for

A method for use with an imaging system server of the type having a first processing arrangement coupled with a second processing arrangement is provided. The method includes the steps of: transmitting a first job written in a first printer page description language to the second processing arrangement; setting a flag in the second processing arrangement to a first status in response to transmitting the first job thereto; translating the first printer page description language into a first interpreted output with a first memory map; transmitting the second job to the first processing arrangement; setting the flag in the second processing arrangement to a second status in response to transmitting the second job to the first processing arrangement; checking the status of the flag in the second processing arrangement; and swapping portions of the first memory map and portions of a second memory map disposed in a storage section with the first processing arrangement in response to a change in the status of the flag, so that the portions of the first memory are disposed in the storage section and portions of the second memory map are disposed in the second processing arrangement for use in translating the second printer page description language into a second interpreted output.

Method for translating a plurality of printer page description languages

An apparatus in which a sheet is advanced into registration with different color information developed on master sheets secured releasably on different drums. Each master sheet is secured to a gripper bar having outwardly extending pins. The pins in the master sheet gripper bars mount in holes in the drum and extend outwardly therefrom. A chain driven gripper bar advances the sheet into registration with successive master sheets. The sheet gripper bar is mounted pivotably and slidably on the chain. The sheet gripper bar has notches in the leading edge thereof to mesh with the pins extending from the master sheet gripper bar. This detachably couples the sheet and the master sheet to move in unison with one another. In this way, the sheet is placed in registration with the different color information developed on each master sheet. After the color information is transferred from the master sheet to the sheet, the sheet gripper is decoupled from the pins and advances with the chain to place the sheet in registration with the next successive master sheet.

Registration apparatus for a printing system

A raster output scanner in which a movable scanning element scans a high intensity beam across a movable imaging member to record images thereon. The velocity of the imaging member is controlled relative to the beam, and the tilt of the beam is adjusted relative to the imaging member.

Raster scanner including scanning beam tilt correction

A multicolor printing system of the type in which a plurality of latent images are recorded therein. Each one of the plurality of latent images are developed with a different color liquid developer material to form a plurality of different color liquid images. The different color liquid images are transferred, in superimposed registration with one another, to an intermediate member to form a multicolor liquid image thereon. Thereafter, the multicolor liquid image is, in turn, transferred to a sheet and fused thereto.

Multicolor printing system

An apparatus in which fixed and variable indicia are printed on a receiving member. One portion of a xeroprinting master has an imagewise pattern corresponding to the fixed indicia formed thereon. The xeroprinting master is uniformly charged and, the portion thereof having the imagewise pattern formed thereon, uniformly exposed to light energy. This records a fixed electrostatic latent image corresponding to the fixed indicia thereon. Another portion of the charged xeroprinting master is selectively exposed to light energy to record a variable electrostatic latent image corresponding to the variable indica thereon. The fixed and variable electrostatic latent images are developed, and the developed image is transferred to the receiving member to print the fixed and variable indicia thereon.

Growing community of inventors

Penfield, NY, United States of America

Thomas Robson