INK SUPPLY DEVICE AND INK JET RECORDING UNIT

摘要

PURPOSE:To stabilize the volume efficiency of ink while preventing the deterioration thereof generated by the penetration of air. CONSTITUTION:A stepped part shallower than the diameter of the elastic member 11 provided around a communication hole 7 is provided to the bottom surface of an auxiliary ink chamber 6 and the elastic member 11 is arranged so as to come into line contact with the side wall and bottom surface of the stepped part. An absorbing member 9 is brought into contact with the elastic member 11 under pressure and also brought into close contact with the side wall and bottom surface of the stepped part of the auxiliary ink chamber 6 by the elastic force of the elastic member 11. Therefore, the air penetrating from the gap between the side surface of the auxiliary ink chamber 6 and the absorbing member 9 is blocked by the pressure contact part of the elastic member 11 and the close contact part of the elastic member 11 and the auxiliary ink chamber 6 and the supply defect and the lowering of the volume efficiency of ink caused by the penetration of air into the communication hole 7 can be prevented.