Patent ID: 7156481
Filing Date: 2007-01-02
Classification: B41J

Abstract:
1. An ink jet recording apparatus which performs printing by ink ejection, said apparatus comprising: a pressure chamber in which ink liquid is filled; a nozzle hole which is formed so as to communicate with said pressure chamber; a piezoelectric element which is formed on said pressure chamber, and deforms said pressure chamber by mechanical expansion and contraction, wherein pressure is generated in the pressure chamber, and ink is ejected from said nozzle hole; a case accommodating said piezoelectric element and having an inlet for introducing dry gas into said case; and a dew point control unit for introducing the dry gas into said case via said inlet and maintaining a dew point in an atmosphere of said piezoelectric element and in the vicinity of the piezoelectric element at a lower value than a dew point in an environment where said ink jet recording apparatus is set.