Web splicing method and web splicing apparatus

摘要

The present invention provides a web splicing method and a web splicing apparatus with which a line velocity on an output side of the splicing apparatus does not fluctuate through a web splicing operation. The method and apparatus are further operable to maintain a line velocity at a predetermined velocity after the web splicing operation. The method of the present invention includes the steps of: connecting a second web Wb fed out from a second roll B to a first web Wa; cutting off the first web Wa at a position between a point at which the second web Wb is connected to the first web Wa and a first roll A; spinning the second roll B to feed out the second web Wb; obtaining a value of a diameter of the second roll B based on a state of an accumulator 4 ; and controlling a circumferential velocity of the second roll B based on the obtained diameter.