Ink jet recording device with pressure-fluctuation absorption

Claim 1

An ink jet recording apparatus comprising: an ink source; an ink feeding path for feeding ink from said ink source; a movable carriage; and an ink jet recording head mounted on said carriage and having at least one ink discharging opening, an ink pathway communicating with each said ink discharging opening, energy generating means disposed along a side wall of each said ink pathway and being actuatable for generating energy used to discharge from said opening ink in said ink pathway, a first ink chamber for containing ink and supplying it to said ink pathway, said ink chamber having a first wall and a second wall, said first wall substantially coplanar with the ink pathway side wall on which said energy generating means is disposed, and said second wall opposite said first wall, and a second ink chamber for containing ink and supplying it to said first ink chamber, wherein said second ink chamber is in communication with said ink feeding path and shares said second wall with said first ink chamber and communicates with said first ink chamber through an opening in said second wall, wherein said second ink chamber has therein a flexible space filled with air for absorbing pressure fluctuations created in said first ink chamber by actuation of said energy generating means and by movement of said carriage, thereby preventing such fluctuations from propagating to said ink feeding path.