Method and apparatus for preventing nozzle clogging in ink jet printing apparatus
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United States of America Patent
Stats
-
Mar 5, 2002
Grant Date -
Aug 16, 2001
app pub date -
Jan 19, 1999
filing date -
Jan 19, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An ink-jet printing apparatus and method in which a head unit having at least one nozzle ejects ink drops on demand, a sheet transporting path disposed below the head unit transports a sheet through the head unit, and an ink deposit unit disposed below the sheet transporting path is arranged to directly receive ink drops ejected form the nozzle when a nozzle-clog-preventing/ink ejection operation is executed. A controller initiates and stops the nozzle-clog-preventing/ink ejection operation based on whether or not a sheet is detected by sheet detecting elements disposed adjacent to the head unit.
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Cited Art Landscape
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