发明授权
US5802945A Needle roller arrangement with several needle rollers for perforating a material web 失效
针辊布置有多个滚针,用于穿孔材料网

Needle roller arrangement with several needle rollers for perforating a
material web
摘要:
A needle roller arrangement includes several needle rollers arranged in a freely rotatable manner in a rotary frame on a circular line which is concentric to its rotational axis. One of the needle rollers interacts with a brush roller for perforating a material web passing through the arrangement. In order to be able to lift the needle roller interacting with the brush roller away and replace it while requiring less energy, each roller is arranged inside the rotary frame such that it can be lifted off of the brush roller. The needle roller interacting with the brush roller is respectively provided with an arrangement for removal from the brush roller and application to the brush roller.
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