Patent ID: 9010913
Filing Date: 2015-04-21
Classification: B41J

Abstract:
1. An ink cartridge comprising: an ink storage container configured to store ink; a socket portion provided at one end of the ink storage container and configured to be fitted to and detached from a joint portion of a printing machine; an ink supply port provided in the socket portion; and an inner plug configured to seal an ink passage to the ink supply port in response to biasing force applied from a side of the ink storage container, wherein the inner plug includes an ink holding portion for an insertion shaft provided in the joint portion to be inserted, the insertion shaft pressing the inner plug against the biasing force upon a fitting of the socket portion to the joint portion enables the ink passage to communicate with the ink supply port, and the ink holding portion with the insertion shaft pulled out from the ink holding portion after inserted holds the ink near the ink supply port.