G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 3/12 (2006.01) B41J 2/01 (2006.01) B41J 11/00 (2006.01) B41J 11/42 (2006.01) G06K 15/02 (2006.01) H04N 1/38 (2006.01)
Patent
CA 2354434
A remission sensor is provided in an inkjet printing apparatus for various measurement tasks, which sensor is constructed for densiometric and colorimetric measurement tasks and has a high local resolution. In a first application, the borders of the picture carrier are detected and the printing of pixels of the digital image located outside the borders prevented. This permits the manufacture of borderless pictures without the wasting of printing ink. In a second application, the sensor is used for the photoelectric scanning or measurement of co-printed print head test patterns. The functional condition of the print head(s) can be determined by analysis of the measurement data obtained with suitable algorithms, and corresponding measures can be initiated. In this way the production of waste can be prevented. In a further application, the sensor is also used for the measurement of co-printed color test patterns. Changes in the color reproduction quality can be recognized in time with measurement technology by analysis of the measurement data obtained and comparison thereof with corresponding reference values, and the changes can be corrected by suitable measures.
Keller Guido
Kundig Armin
Schrammli Fortunat
Waldner Stephan
Borden Ladner Gervais Llp
Gretag Imaging Trading Ag
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