Ink jet printing appartus for identifying ejection error
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 31, 2004
Grant Date -
Feb 21, 2002
app pub date -
Jun 20, 2001
filing date -
Jun 21, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention provides a printing apparatus which has an ink ejection head capable of forming an image at high resolution and still can reliably identify a location where an ink ejection error has occurred without using an expensive image reading device. This printing apparatus has a distance adjusting device to change a distance between the ink ejection head and the print medium, and a controller to set a plurality of different distances by controlling the distance adjusting device. The controller controls the distance adjusting device to selectively set either a first distance that produces a normal printed image having within a predetermined range a landing error on the print medium of ink droplets ejected from the print head or a second distance that produces a landing error greater than the predetermined range.
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