Ink jet recording apparatus of the continuous jet type
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United States of America Patent
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Mar 28, 1995
Grant Date -
N/A
app pub date -
Oct 30, 1991
filing date -
Nov 5, 1990
priority date (Note) -
Expired
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Abstract
An ink jet recording apparatus of the continuous jet type wherein the position of an ink jet jetting axis or nozzle axis can be detected readily with a simplified construction. The ink jet recording apparatus comprises test signal generating means which generates a controlling signal which varies continuously. Switch means selectively couples one of recording signal generating means and the test signal generating means to a controlling electrode of charging means provided for charging an ink drop. An electrically isolated conductive drop catcher catches an ink drop which has passed by separating means for forming an ink jet, and current detecting means detects electric charge carried to the conductive drop catcher by charged ink drops as an electric current. Relative position detecting means measures a relative positional relationship between an ink jet flying axis and the separating means from a controlling voltage outputted from the test signal generating means and an output of the current detecting means.
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