| 摘要 |
PURPOSE:To regulate a pressure in an ink vessel correspondingly to a small ink consumption as well. CONSTITUTION:An ink vessel comprises a bottom plate 4 having an ink supply port 5, an outer cylinder 1 mounted on the plate 4, and an inner cylinder 2 mounted at an opening part on the plate 4 and disposed in the cylinder 1, wherein the cylinder 2 is formed of a flexible material, mounted on the plate 4, many slits (s) are formed on a surface of an outer wall 2a in a circumferential direction, the cylinder 2 is bent at a bent part 2b toward a direction of the plate 4 to become an inner wall 2c and to be connected to a disclike bottom wall 2d. The cylinder 2 contains ink 6. When a negative pressure is generated therein, collapse of the wall 2a does not almost occur, the wall 2d is sucked inward by the negative pressure to operate the part 2b connected to the wall 2d, thereby irreversibly shifting a forming position of the part 2b toward the plate 4 mounted with the cylinder 2. |
