Patent ID: 9102842
Filing Date: 2015-08-11
Classification: B41J,C09D

Abstract:
1. An ink composition used in a recording apparatus provided with a pressure regulation valve which performs opening and closing operations to adjust a pressure in a recording head, the pressure regulating valve forming a portion of an ink flow path of the recording head, wherein the pressure regulating valve allows the ink composition to flow through the ink flow path during the opening operation and prevents the ink from flowing through the ink flow path during the closing operation, the pressure regulating valve includes a plate that contacts another portion of the pressure regulating valve to close the ink flow path during the closing operation and is released from contact with the another portion of the pressure regulating valve during the opening operation, and the plate is enveloped by an elastic seal such that a surface of the plate that contacts the another portion of the pressure regulating valve is entirely covered with the elastic seal while another surface of the plate is partially not covered with the elastic seal, the ink composition comprising: a slip agent; and a lactone system medium.