| 摘要 |
PURPOSE:To prevent printing quality from being lowered in a short time due to defective feeding of an ink ribbon, by providing the ink ribbon with marks inscribed at regular intervals, and providing a detecting part capable of detecting the marks. CONSTITUTION:An ink ribbon feeding condition detecting part 5 comprising a photoelectric element or the like capable of detecting the presence or absence of a material through interception of light is provided, and ink ribbon feeding condition detection holes 6 are inscribed on an ink ribbon 2 at regular intervals. By measuring the time interval at which the detection holes 6 are passed through the detecting part 5, it is possible to detect whether the feeding of the ink ribbon 2 is in a normal condition. When abnormal feeding of the ribbon 2 is detected, the operation of a printing head 1 is stopped. |
