Web splicing method and web splicing apparatus
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United States of America Patent
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May 3, 2005
Grant Date -
Nov 13, 2003
app pub date -
May 5, 2003
filing date -
May 10, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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.
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