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System for detecting inoperative inkjets in printheads ejecting clear ink using heated thermal substrates

A technology of thermal substrate and print head, applied in printing devices, additive processing, processing heating elements, etc., can solve the problems of difficult test pattern analysis and low contrast, etc.

Active Publication Date: 2015-09-30
XEROX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These materials and inks are difficult to detect by imaging systems due to the low contrast between the clear ink / material on the substrate on which they are jetted
Therefore, the noise in the image data of the pattern on the substrate makes the analysis of the test pattern difficult

Method used

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  • System for detecting inoperative inkjets in printheads ejecting clear ink using heated thermal substrates
  • System for detecting inoperative inkjets in printheads ejecting clear ink using heated thermal substrates
  • System for detecting inoperative inkjets in printheads ejecting clear ink using heated thermal substrates

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Embodiment Construction

[0013] For a general understanding of the context of the devices disclosed herein, as well as details of the devices, reference is made to the accompanying drawings. In the drawings, like reference numerals denote like elements.

[0014] figure 1 The arrangement of components in the printer 100 that produces the three-dimensional object part 10 is shown. As used herein, the term "three-dimensional printer" refers to any device that ejects material to form a three-dimensional object with reference to image data of the object. Printer 100 includes support material container 14 , build material container 18 , a pair of inkjet printheads 22 , 26 , build substrate 30 , planar support member 34 , columnar support member 38 , actuator 42 , and controller 46 . Tubing 50 connects printhead 22 to support material container 14 and tubing 54 connects printer 26 to build material container 18 . Both inkjet printheads are operated by the controller 46 with reference to the three-dimensio...

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PUM

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Abstract

An apparatus detects inoperative inkjets during printing operations. The apparatus includes a supply of thermal substrate that is exposed to heat to darken the substrate. The thermal substrate is printed with materials ejected from a printhead to form a test pattern. The contrast between the ejected materials and the exposed thermal substrate are imaged by an optical sensor to generate image data that are analyzed to identify inoperative inkjets.

Description

technical field [0001] The apparatus disclosed herein relates to printers for detecting dead jets, and more particularly to accurate detection of dead jets in printers using clear inks. Background technique [0002] Printing documents on substrates (eg, paper) is known. Newer forms of printing now include digital 3D manufacturing, also known as digital additive manufacturing. This type of printing is the process of making a three-dimensional solid object of virtually any shape from a digital model. 3D printing is an additive process in which one or more print heads eject successive layers of material in different shapes on a substrate. Three-dimensional printing is distinguishable from traditional object forming techniques, such as cutting or drilling, which rely primarily on removing material from a workpiece through a subtractive process. [0003] Producing three-dimensional objects with these printers can take hours, and for some objects, even days. One problem that a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C67/00
CPCB41J2/2142B41J2/16579B41J2/32B33Y30/00B41J11/0095B29C67/0051B41J29/393B41J2/175B41J29/02B33Y50/02B29C64/112B41J2/2114B29C64/393B29C64/295B29C64/209
Inventor W·H·韦曼
Owner XEROX CORP