| 摘要 |
The disclosed web splicing apparatus and method provide for the in-registry lap splicing of a new web, that has a spaced, regularly repeating pattern thereon to an expiring web that has an identical, spaced, regularly repeating pattern thereon and that is moving under tension and at a relatively high speed along a predetermined path of travel. The leading end =of the new web is prepared for a splice so that a pattern thereon is aligned with a first pre-selected point. During a splice, a portion of the expiring web is substantially stopped and then moved at a relatively slow speed past a sensor that is positioned at a second pre-selected point downstream from the first pre-selected point and that senses the passage of the next pattern on the slowly moving expiring web. Upon the sensing of the passage of the next pattern, the leading end of the new web is secured to a part of the portion of the expiring web upstream from the second pre-selected point, and the portion of the expiring web is cut upstream from the secured part of the expiring web. Thereafter the joined webs are permitted to run along the path of travel at the relatively high speed.
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