Patent ID: 6991325

Claim:
An ink replenishing device which replenishes ink from a main ink tank to a sub ink tank, wherein ink form the sub ink tank is supplied to a recording head which ejects an ink droplet to a recording medium based on image information and the ink being reservoired in the sub ink tank, the device comprising: a first connecting member which is provided in the main ink tank; a second connecting member which is provided in the sub ink tank and when connected to the first connecting member constitutes an ink channel; a sealing member which brings the first connecting member and the second connecting member into close and sealing contact with each other in a connected state thereof; an opening and closing member which is provided in the second connecting member and able to open/close the ink channel; and opening means for opening the ink channel to atmosphere by using the opening and closing member in a connecting operation of the first connecting member and the second connecting member.