| 摘要 |
A method and web splicing assembly for heat-seal splicing together a trailing end of running first, two-sided plastic material web and a leading end of a second, two-sided plastic material web, and then for heat-seal splicing together a leading end of third, two-side plastic material web and the trailing of the then running, second web so that after the webs have been spliced and are running, like surfaces of the webs face the same direction. The web splicing assembly includes first and second splicing sub-assemblies. The first sub-assembly has a first, relatively movable slide bar and a first, relatively fixed nip bar. The second sub-assembly has a second, relatively movable slide bar and a second, relatively fixed nip bar. The sub-assemblies are each movable between a first position and a second position. In their first positions, the sub-assemblies are disposed so that portions of the webs to be heat-seal spliced are clamped between the first slide bar and the second nip bar. In their second positions, the sub-assemblies are disposed so that the portions of the webs to be heat-seal spliced are clamped between the second slide bar and the first nip bar. Each slide bar carries a heated wire that heat severs the clamped web portions along a localized area that extends across the web portion and heat-seals parts of the clamped web portions together adjacent to the area. |
