INK CARTRIDGE FOR INK-JET TYPE RECORDING APPARATUS, AND ITS MANUFACTURE

摘要

PROBLEM TO BE SOLVED: To surely prevent generation of air bubbles at an ink feed opening by forming a ring-shaped thin rib at an upper face of a packing and shutting a space between a through hole and an outer side part of the packing in an ink cartridge including a film for sealing the ink feed opening. SOLUTION: An adhesive 19 having resistive properties to ink is applied to an upper face at the side of a projecting part 12 to fill a space S to a container main body perfectly. A pressing member 20 having a window 20a allowing an ink feed needle to pass through is brought in elastic touch with a lowerend of a packing 16 and, thermally welded to the container main body. The packing 16 is inserted while a rib 16b of the packing 16 is elastically deformed to a widened part 15. By the adoption of the method, the space S being present between a side part of the packing 16 and the widened part 15 is shut not to communicate with a through hole 14. A notches part 22 is also provided at a gap to a bottom part of the main body, thereby securing a space even when the ink cartridge is tightly sealed in a package bag or the like.