Methods and articles for determining invisible ink print quality
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United States of America Patent
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Apr 1, 2003
Grant Date -
N/A
app pub date -
Aug 30, 1999
filing date -
Aug 30, 1999
priority date (Note) -
Expired
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Abstract
A test target having N invisible test data encodements (66.sub.0 -66.sub.N, 74.sub.0 -74.sub.N, 74'.sub.0 -74'.sub.N) each comprising test data printed over the surface of test print media media in a defined spatial order printed in invisible ink by a printer under test. The invisible ink print quality of the printer is determined by the ability of an invisible encodement reader to decode certain of the N invisible encodements (66.sub.0 -66.sub.N, 74.sub.0 -74.sub.N, 74'.sub.0 -74'.sub.N). In a first preferred embodiment, a test print media is prepared by pre-printing or coating a media surface with an invisible ink that is sensitive to the same wavelength of light as the printer ink in a plurality N of areas on the media surface providing step background densities (58.sub.0 -58.sub.N) ranging from no applied ink to maximum printer ink density in a test tablet manner In the test mode, N test data files are printed as N invisible encodements (66.sub.0 -66.sub.N) in the corresponding N areas (58.sub.0 -58.sub.N) thereby creating a test target that is to be read by the reader. It is presumed that the print quality that the printer is capable of achieving is degraded if fewer than a predetermined number of encodements (66.sub.0 -66.sub.N) are readable, and the invisible ink is replaced or replenished. In a second preferred embodiment, the test target comprises N invisible encodements (74.sub.0 -74.sub.N, 74'.sub.0 -74'.sub.N) differing from one another in a step tablet manner printed by the printer (16) under test. The encodements (74.sub.0 -74.sub.N, 74'.sub.0 -74'.sub.N) are read and decoded to the extent possible using the reader. The particular ones of the encodements (74.sub.0 -74.sub.N, 74'.sub.0 -74'.sub.N) that can be accurately decoded provide a measure of the print quality that the printer is capable of achieving.
First Claim
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- EASTMAN KODAK COMPANY
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Bryant, Robert C | Honeoye Falls, NY | 32 | 596 |
Nelson, David J | Rochester, NY | 58 | 1000 |
Williams, Kevin W | Rochester, NY | 39 | 492 |
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Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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