Ink head recovery method and apparatus
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United States of America Patent
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-
Dec 23, 1997
Grant Date -
N/A
app pub date -
Mar 6, 1995
filing date -
Oct 18, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An ink jet recording apparatus includes a recording head for performing recording by discharging ink by forming a bubble by applying thermal energy to a heat acting portion of an ink holding portion of the recording head. Thermal energy is generated in the recording head and a cap sealingly caps a discharge opening forming surface of the recording head. Ink is sucked from the cap and positive recovery is effected so that 10.sup.4 or more times of preliminary discharges are performed toward the cap which is detached from the recording head, by supplying energy greater than energy at a recording condition by predetermined multiples of a minimum energy E.sub.o required for generating the bubble, and for causing the ink to be sucked in the cap that is open to atmosphere.
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