Xerox Corporation

3d Systems, Inc.

Tektronix, Inc.

Mark Raymond Parker

Donghoon Lee

Jule W Thomas, Jr

Bo Wu

Meng Yao

Dong Hoon Lee

Joel Chan

Conor D Kelly

Lisa Marie Schmidt

Edward Sheufelt

David Lyell Knierim

David Jon Metcalfe

Barry Daniel Reeves

Stephen Michael Kroon

Loc V Bui

James D Rise

Michael Thomas Stevens

Clark W Crawford

Edward F Burke

Jeffrey Russell Kohne

Theresa Michelle Marconi

David D Martenson

Larry Church

Barry E Morgan

Srinivasa D Rangaraj

In one aspect, build materials and support materials for use with a 3D printer are described herein. Such materials include a phosphor component in combination with other components. In some embodiments, the phosphor component of a build material or support material is present in the material in an amount of 0.001-0.5 wt. % and has a peak photoluminescence (PL) emission wavelength of 430-750 nm and a photoluminescence quantum yield (QY) of 0.10-1.

3D printing build materials and support materials comprising a phosphor

A method of manufacturing a three dimensional article includes forming the three-dimensional article with three-dimensional printing, processing the three-dimensional article to remove support material ink, illuminating the three-dimensional article with electromagnetic radiation, inspecting the three dimensional article for photoluminescence that is responsive to the illumination, and verifying whether the support material has been sufficiently removed based upon the inspection. The support material ink includes a phosphor component that phosphorescently emits light in response to the illumination.

Method of verifying integrity of a post-process removal of support material

In an aspect of the disclosure a three dimensional printing system includes an elevator mechanism for supporting a build plate, a printhead assembly, a movement mechanism, and a controller. The printhead assembly includes a printhead and a planarizer arranged along a scan axis. The movement mechanism is for scanning the printhead across the build plate. The controller is configured to: (a) print one or more base layers of ink onto the build plate, (b) print one or more layers of test patterns onto the base layers until an alignment determination can be made, wherein the test patterns comprise different timing values, and (c) receive information and update a scan axis timing parameter based on the determination.

Method and calibrating an inkjet based three-dimensional printing system

A method manufacturing a three-dimensional article having readable indicia includes three-dimensionally printing the article and post-processing that following the printing. The three-dimensional printing forms the three-dimensional article in a layer-by-layer manner. The resultant three-dimensional article includes an outer portion of build material defining a plurality of enclosed internal channels, an encapsulated support material containing a phosphor component defining the indicia disposed within the channels, and unencapsulated support material that provides structural support to otherwise unsupported portions of the build material during the three-dimensional printing. The post-processing removes the unencapsulated support material form the build material but leaves the encapsulated build material.

Three-dimensional article having permanent phosphor indicia formed from sacrificial support material

In one aspect, methods of printing a color 3D article are described herein. In some embodiments, a method described herein comprises receiving data representing a surface colorization of the article, and transforming the data representing the surface colorization of the article into voxel data of the article. The voxel data comprises (a) location values and at least one of (b) color values and (c) transparency values for a plurality of columns of voxels normal or substantially normal to a surface of the article. The method further comprises selectively depositing layers of one or more build materials onto a substrate to form the article in accordance with the voxel data. In addition, at least one column of the plurality of columns of voxels exhibits a surface color resulting from a combination of colors of a plurality of voxels of the column.

3D printing colorization

A method measures distances between two printed lines on a rotating image receiving member to identify fluid drop mass or fluid drop velocity changes in inkjet ejectors in an inkjet printing system. An initial distance between the two lines is measured at the start of the operational life of the system. During the operation of the printing system, the lines are reprinted and the distance between the two lines compared to the initial distance stored in association with the printheads that printed the lines. If the distance has changed by more than a predetermined amount, a printer parameter is adjusted.

System and method for measuring fluid drop mass with reference to test pattern image data

A method measures distances between two printed lines on a rotating image receiving member to identify fluid drop mass or fluid drop velocity changes in inkjet ejectors in an inkjet printing system. An initial distance between the two lines is measured at the start of the operational life of the system. During the line of the printing system, the lines are reprinted and the distance between the two lines compared to the initial distance. If the distance has changed by more than a predetermined amount, a firing signal for the printheads that printed the lines is adjusted.

A system detects image data in an image data stream that cause ink ejection errors and replaces the image data with a replacement pattern that attenuates the ink ejection errors. The system includes a scanline memory for storing image data, an input data register for forming an image data pattern from image data read from the scanline memory and an image bit received from an image data stream, an image data pattern detection circuit having a comparator that is configured to compare a portion of an image data bit stream used to drive a print head in an ink jet printer to a plurality of detection bit patterns and to generate a bit pattern detection signal in response to the portion of the image data bit pattern corresponding to one of the detection bit patterns, a replacement bit pattern circuit being configured to replace the portion of the image data bit stream corresponding to one of the detection bit patterns with a replacement bit pattern, the replacement bit pattern being different than the detected bit pattern, a tag register coupled to the image data pattern detection circuit and being configured to modify the comparison of the portion of the image data bit stream to one of the detection bit patterns, and an output data register for providing a replacement image bit from the replacement bit pattern to a print head controller and for storing a remainder of the replacement bit pattern to the scanline memory.

System for replacing a portion of an image data stream in an ink jet printer

A method of improving black print quality in a color printer having at least one color ink and black ink includes determining a location on a substrate where a black pixel is to be printed, printing a droplet of color ink at the location, and printing a droplet of black ink with the color droplet. If the color printer includes cyan, magenta and yellow, then a droplet of cyan ink, magenta ink or yellow ink may be printed with the droplet of black ink. For images containing black at a plurality of locations, the cyan, magenta and yellow droplets may be equally distributed among the plurality of locations. Alternatively, the cyan, magenta and yellow droplets may be distributed in accordance with a digital halftone screen.

Method for enhanced black in draft mode

A method of printing including replacing each of black dots of a first subset of black dots of a bit map for a predetermined area with a process black dot, adding a non-black dot to each of black dots of a second subset of black dots of the bit-mapped data, and printing the bit map.

Color printing

A method of printing including changing each process black dot and each black plus non-black dot of a halftoned bit map to a black dot, if each of first and second adjacent dots on either side of such process black dot or black plus dot along a predetermined axis comprises a black dot, a black plus non-black dot, a process black dot, or a white dot, and printing the bit map.

A method to compensate for dot placement errors includes receiving image data comprising a plurality of pixels, each having at least two states, a first corresponding to depositing no ink and a second corresponding to depositing ink; identifying a stray pixel pattern within the image data, the stray pixel pattern including a stray pixel corresponding to a misplaced dot in a dot pattern; and modifying the image data corresponding to the stray pixel pattern by setting the stray pixel to the first state and changing a second pixel from the first state to the second state.

Text and image quality enhancement

Disclosed is a phase change ink composition comprising (a) a phase change carrier, (b) a cyan colored resin or wax comprising the reaction product of (i) a cyan colorant having at least one functional group selected from (A) hydroxyl groups, (B) primary or secondary amino groups, (C) mercapto groups, or (D) mixtures thereof, and (ii) an isocyanate, and (c) an organic acid selected from (i) organic sulfonic acids, (ii) organic phosphinic acids, (iii) organic phosphonic acids, or (iv) mixtures thereof.

Growing community of inventors

Portland, OR, United States of America

Mark Raymond Parker