| 摘要 |
PURPOSE:To enhance the use efficiency of ink by preventing the close adhesion of an ink bag, by providing a plurality of close adhesion preventing elements to the inner surface of at least one of the upper and the lower films of the ink bag. CONSTITUTION:A plurality of strip shaped thick wall parts 3 provided to the inner surface or the outer surface of films 1a, 1b forming the upper and the lower surface parts of an ink bag are formed toward the ink discharge direction of the ink bag 1 and consideration is taken so as to generate the collapse of the ink bag 1 toward a definite direction, that is, an ink discharge direction with the consumption of ink. By this mechanism, the close adhesiveness of the upper and lower films with the consumption of the ink is prevented to inhibit the blockage of the ink and ink consumption efficiency can be enhanced. |
