| 摘要 |
A splicing mechanism on a continuous rewind apparatus cuts and transfers a moving web onto a new core with a no-fold-back and wrinkle-free splice. The splicing mechanism includes a perforated cutting knife provided with a set of gaps spaced apart along the length of the knife. Cutting the web with the perforated knife results in a partially cut web wherein small tabs of material hold the tail and the new leading edge of the web together. The tabs precisely control the new leading edge of the web until it reaches the new core. The web is then pressed against the new core which is covered with an adhesive tape. However, the adhesive is unable to hold the tail portion of the web, which is still intact, and the tail is therefore pulled away from the new core and rewound onto the finished roll. When the cut section of the web reaches the new core, the adhesive bond between the web and the new core is stronger than the tabs, so the tabs break, allowing the tail to continue on its way while the leading edge is smoothly and flatly affixed to the new core. No-fold-backs or wrinkles result from the splice. A mechanism for resetting the knife is also provided on the rewind apparatus.
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