| 摘要 |
PURPOSE:To prevent a paper from being wrinkled or broken and prevent mis- selection of a route from occurring where routes are complicated, by providing a mechanism for switching a grip by engaging selectively with a connecting member, at closely spaced parts of perforated belts. CONSTITUTION:A leading end tab 3 of a web 2 is tied to a feeding belt 1 by a string 8 through one of slit form slots 9 which are provided in the belt 1 at regular pitch. A lead 10 tied with the tab string 8 is easily inserted into the slot 9 of the belt 1, and has a fixed holding force. A grip-switching mechanism 14 has a function of, for example, transferring the lead 10 from the feeding belt in a system A to a system B or returning the lead 10 from the system B to the system A. An upper guide 17 and an upper roll 18 so function that when switching the grip of the lead 10 onto the feeding belt in the other system, a head part 11 of the lead 20 is pushed up by an outer peripheral flat part of a lower roll 16, and a recessed part provided at the outer periphery of the upper roll 18 permits the lead 10 to be transferred to the feeding belt in the system B. The slots 9 of the feeding belts in both of the systems A, B must approach each other in the same phase and at the same speed, which is ensured by phase matching of the slots 9 and equal-speed driving of the rolls 16, 18. |
