Test Pattern for Compensating for a Lateral Offset in the Detection of an Impaired Nozzle
US-2024408893-A1 · Dec 12, 2024 · US
Method of measuring printer characteristics
US8939540B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8939540-B2 |
| Application number | US-12227008-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 16, 2008 |
| Priority date | Jul 17, 2007 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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A method ( 300 ) is described of determining characteristic of an ink jet printer ( 15 ). A chart containing multiple regions or patches is printed ( 320 ) on a print medium ( 115 ) using the ink jet print ( 15 ). The chart includes at least a first region printed using a first set of nozzles, and at least a second region printed using a second set of nozzles. The first and second sets of nozzles are a predetermined distance apart in the printer head of the printer ( 15 ). The printing of the first and second regions is also separated by a print medium advance operation equal to the predetermined distance. This causes the first and second regions to be aligned in the direction of the print medium advance operation. The chart is then imaged using scanner ( 16 ) chart to form a chart image. The positions of the regions appearing in the chart image are next determined ( 340 ). The spatial alignment characteristic of the printer is calculated from the distance, in the medium advance direction, between said first and second regions.
First claim
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The claims defining the invention are as follows: 1. A method of determining a spatial alignment characteristic of a printer, the method comprising the steps of: printing onto a substrate a plurality of patches at predetermined measurement points to form a test pattern, each of the plurality of patches having sparse dots pseudo-randomly positioned in a spread spectrum pattern; imaging the test pattern to locate patches of the plurality of patches of the test pattern; comparing…
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- B41J29/393Primary
Operations & Transport · mapped topic
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- What does patent US8939540B2 cover?
- A method ( 300 ) is described of determining characteristic of an ink jet printer ( 15 ). A chart containing multiple regions or patches is printed ( 320 ) on a print medium ( 115 ) using the ink jet print ( 15 ). The chart includes at least a first region printed using a first set of nozzles, and at least a second region printed using a second set of nozzles. The first and second sets of nozzl…
- Who is the assignee on this patent?
- Fletcher Peter Alleine, Parker Steven, Yip Ben, and 5 more
- What technology area does this patent fall under?
- Primary CPC classification B41J29/393. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).