Inkjet printers
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United States of America Patent
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N/A
Issued Date -
Jun 9, 2005
app pub date -
Nov 16, 2004
filing date -
Nov 17, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of printing an image (12) on a substrate (11) comprises controlling an inkjet printer head (10) having a plurality of nozzles (21-23) to print the image on a substrate in a series of swaths (30A, 30B). Periodically, a check for full or partial blockages in a nozzle of the inkjet printer head is performed by causing each nozzle (21-23) to print the same predetermined pattern (1, 1', 1') on a substrate and analysing the patterns to determine any differences between them and to identify a blocked or partially blocked nozzle if its printed pattern differs by more than a predetermined amount from that of the other nozzle(s). The checking step is carried out following each swath (30A, 30B) of the inkjet printer head (10) across the substrate (11).
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