Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element
Patent
1987-10-06
1990-01-30
Hartary, Joseph W.
Recorders
Performance of multiple functions of steam and gas engines
Pressure responsive element
346140R, G01D 1516, B41J 304
Patent
active
048976652
ABSTRACT:
A method of driving an ink jet recording apparatus which is provided with a recording head having a discharge port for discharging ink droplets, a discharge energy acting chamber communicating with the discharge port, and a piezo-electric element for generating discharge energy for ink droplet discharge mechanically coupled to the discharge energy acting chamber, and in which an electrical signal is supplied to the piezo-electric element thereby to vary the volume of the discharge energy acting chamber and cause ink droplets to be discharged from the discharge port to accomplish recording, is characterized in that when the length from the discharge port to that portion of the recording head which reflects a pressure wave produced by the supply of the electrical signal is l and the speed of sound in the ink is c, the electrical signal supplied to the piezo-electric element is of a composite wave-configuration of at least two pulse wave-configurations, i.e., such a pulse wave-configuration that after time 2l/c elapses after a first pulse wave-configuration has been supplied, a second pulse wave-configuration is supplied.
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Canon Kabushiki Kaisha
Hartary Joseph W.
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