an ink jet recording apparatus includes an ink tank and an ink bladder for containing ink disposed in the tank an ink path directs ink in the ink bladder outwardly therefrom and a closure member for closing the ink path comprises at least two sealing materials having different functions a housing member houses the ink bladder and the closure member and an ink supply system having a hollow needle supplies ink to a recording head for discharging the ink application_number US 46577690 A description the present invention will hereinafter be described in detail with respect to some embodiments shown in the drawings an embodiment of the ink cartridge or container of the present invention will first be described by reference to fig1 a and 1b fig1 a is a plan view of the ink container and fig1 b is a partly broken away side view thereof reference numeral 10 designates a flexible ink bladder or bag like container formed by folding a film formed by putting nylon on a polymeric film of two layered structure such as polyethylene film and joining the three side edges 10x 10y and 10z thereof as by heat melting an ink outlet pipe 11 as an ink outlet for directing the ink in the container 10 outwardly thereof is attached to the joined surface of one of the three side edges 10x reference numeral 12 designates a stepped pillar shaped first coupling member formed of an elastic material such as rubber a void 14 this void 14 is not always necessary but generally when a sealing member and a needle or similar pipe are to be coupled together it is difficult to make the axes of the two members completely coincident with each other and.