Incremental printing of symbolic information – Ink jet – Ejector mechanism
Patent
1992-09-24
1994-08-23
Fuller, Benjamin R.
Incremental printing of symbolic information
Ink jet
Ejector mechanism
347 30, B41J 2165
Patent
active
053411633
ABSTRACT:
An ink jet recording apparatus has a recovery unit designed to reduce the possibility of an ink droplet ejection failure or malfunction and to enable stable recording even if the recording head is left for a long period of time without being tightly covered with a cap. The recovery unit is controlled in such a manner that it is operated to perform an ejection recovery operation if a detector detects that the cap is not covering the nozzle of the recording head when the power source of the ink jet recording apparatus is turned on, and the recovery unit is not operated if the detector detects that the cap is covering the nozzle of the recording head when the power source is turned on. Accordingly, the ejection recovery operation is automatically performed if the operator cuts off the power supply during recording or when the recording head is not covered tightly with the cap, then leaves the apparatus in this state for a long time and thereafter starts recording. However, the ejection recovery operation is not performed if the recording head is tightly capped when the power source is turned on, thus avoiding needlessly wasting ink by performing an unnecessary recovery operation.
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Canon Kabushiki Kaisha
Fuller Benjamin R.
Le N.
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