Patent ID: 6170939
Filing Date: 2001-01-09
Classification: B41J

Abstract:
An ink tank comprising:a joint portion for accepting an ink feed pipe of an ink jet head for connection and disconnection of said ink let head and said ink tank;a storing portion for storing ink to be fed to said ink jet head;a communicating portion which communicates said storing portion with the atmosphere;a valve mechanism in said joint portion comprising a cylindrical member projectingly provided at said joint portion, and a valve body movably arranged within said cylindrical member; anda filter disposed between said valve mechanism and said ink storing portion, whereinsaid valve mechanism allows an outflow of ink to said ink jet head through said joint portion when connected to said ink feed pipe, and closes said joint portion when disconnected from said ink feed pipe, said valve body is urged by a resilient member within said valve mechanism in a direction where said joint portion is closed, said resilient member is retained by a stopper positioned between a distal end portion of said cylindrical member and said filter, and said stopper comprises ribs for inhibiting deformation of said filter.