| 摘要 |
PURPOSE:To prevent the clogging of the titled device, by providing a pump for feeding ink to the tip of a wire with a valve that hinders passage of ink when feeding operation is stopped. CONSTITUTION:When a rotating shaft 5 is rotated counterclockwise, rollers 3 rotate about a center shaft 6. While the rollers 3 are moving to press resilient tubes 7, 8 between them and the guide 17 of a housing 1, the rollers 3 themselves are rotated about their axes clockwise due to their friction with the resilient tubes 7, 8. The pressed and deformed parts of the resilient tubes 7, 8 can be restored to their original shape after every passage of the rollers. Thus, the resilient tubes 7, 8 are repeatedly pressed and released to perform a pumping action, i.e. sucking and discharging actions. Further, when the rollers are stopped, since the resilient tubes remains pressed, they serve as a valve to interrupt the passage of ink. |
