| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink tube which is suitable for use in a bent state, is not readily deteriorated even when it is bent for a long period of time, and does not readily allow permeation of gas. SOLUTION: The ink tube has base-thickness portions 105c to 105e and expanded portions 106c to 106e which are the part of which thickness is increased from the base-thickness portions. The base-thickness portions 105c to 105e are inner regions of closed curves 107c to 107e and concentric and similar to inner surfaces 108c to 108e and have cross sectional shapes composed of the outside regions of the inner surfaces 108c to 108e. The expanded portions 106c to 106e have cross sectional shapes composed of the outside regions of the closed curves 107c to 107e which are inside of outside surfaces 109c to 109e. The outside surfaces 109c to 109e have cross sectional shapes which have the center of gravity at the position different from the center of gravity of the closed curves 107c to 107e or are not similar to the closed curves 107c to 107e. COPYRIGHT: (C)2007,JPO&INPIT |
