Xerox Corporation

Steven Jay Bloomberg

Yonglin Xie

Jefferey John Gauronski

A method of printing a subject on a medium by use of a printing device including a printhead assembly, wherein the printhead assembly has at least one printhead having an array of marking elements, is accomplished by scanning the printhead assembly along a medium by a succession of passes, the passes being offset from each other in a direction transverse to a scanning movement of the printhead assembly relative to the medium. The subject consists of textual and non-textual material, and pixels of the subject are loaded into the printing device. The method provides for separating pixels of the textual material from pixels of the non-textual material, and printing pixels of at least a portion of the subject by passing the printhead along the medium in a plurality of the passes. In an offsetting of successive ones of the passes, a translation of the printhead in the transverse direction accumulated over the succession of the plurality of passes does not exceed a transverse dimension of the printhead. Non-textual material of the subject is printed in more than one of the plurality of the passes, and textual material of the subject is printed during only one of the plurality of the passes. Examination of print command signals may be made to alter printing protocol based on the presence or absence of color or black.

Single pass printing of text among interleaved printing of non-text material

A method of printing on a print medium with an ink jet printing mechanism having a print head with at least two nozzle arrays. The method comprising steps of printing with the nozzle arrays in a first printing mode, the first printing mode comprising the at least two nozzle arrays printing during a pass of the print head relative to the print medium, a second one of the nozzle arrays printing with a first density masking such that a portion of nozzles of the second nozzle array are prevented from printing during the pass; and switching to printing in a second printing mode when a subsequent pass of the print head relative to the print medium does not require printing from the first nozzle array, the second printing mode comprising the second nozzle array printing without the first density masking during the subsequent pass.

Method of ink jet printing with varying density masking printing and white space skipping for faster paper advancement

In an ink-jet printing apparatus, an arrangement of logic gates disposed between a source of rasterized image signals and printing hardware allows real-time conversion of CMYK image signals for application to an ink-jet printhead which is capable of CMY, RGB, and process and pure black outputs.

Circuit for adapting 4-color image signals to an 8-color digital

A system for digitally trapping color images on a pixel-by-pixel is employed, whereby for each cyan, yellow, magenta and black color separation, an object-oriented trapping process is carried out. After each object is categorized, the original image is separated into a first copy and a second copy. Edge blurring is performed on the edges of the first copy of the original image; masking of a border region is completed on the second copy of the original image according to a laplacian filter, a difference recursive filter or other method. A merged image is created by combining the blurred edge first copy of the image with the mask bordered second copy of the original image; the mask is thereafter removed from the merged image.

Growing community of inventors

Madison, NY, United States of America

Steven Jay Bloomberg