| 摘要 |
PROBLEM TO BE SOLVED: To prevent an action for a user to open the upstream end of a vent groove the open air from forgetting by a constitution wherein at least a projecting part between the projecting part and a portion for covering the projecting part of a covering attached par is made cutable at the specified position, at which the vent groove of the projecting part is formed. SOLUTION: An ink cartridge 1 is circulated under the state as it is. At its use, a user cuts off the sub-coveringly attached part of the projecting part 8 of a lower case 4 and a pouring hole film 15 by breaking them off at a breaking off portion 8a and a cutting line 16. Concretely, by turning up and down the projecting part 8, the sub-covering attached part is broken at the part of the cutting line 16 and further the projecting part 8 is cut off at the breaking off portion 8a. Thus, an ink feed operating 13 is opened, resulting in allowingly to feed ink from an ink tank 6, open the upstream ends of respective venting passages (vent grooves 14) and realize the introduction of the air in the ink tank. |
