| 摘要 |
The invention describes a needle roll (50) for perforation or pickup of material pieces or webs with a needle roll body (60) and needles (72, 72′), which protrudes beyond the outer surface of needle roll body (60) for perforation into material piece (38′). The material roll body (60) is mounted to rotate in machine frame (25). The needles (72, 72′) are movable relative to needle roll body (60).
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