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1. 发明授权

US06698323B2 Apparatus and method for detecting when a web is not being perforated 失效
标题翻译：用于检测网片未被穿孔的装置和方法
公开(公告)号：US06698323B2
公开(公告)日：2004-03-02
申请号：US09567267
申请日：2000-05-09
申请人： John S. Formon , Bernie Dodge , Andrew Morris
发明人： John S. Formon , Bernie Dodge , Andrew Morris
IPC分类号： B26D724
CPC分类号： B26F1/20 , B26D5/00 , B26D7/22 , Y10T83/0515 , Y10T83/088 , Y10T83/089 , Y10T83/141 , Y10T83/4702 , Y10T83/4827 , Y10T83/866
摘要： The present invention provides a web perforating apparatus which includes a system for detecting and indicating when a blade in the apparatus is broken, dull or otherwise not perforating the web. The apparatus is typically used with rewinders or other similar machines that produce perforated sheets of products, such as paper, using sets of stationary anvil blades and rotating perforating blades. The apparatus comprises at least one anvil including a blade holder and an anvil blade which is positioned within the blade holder. The blade holder is formed of an insulating material for electrically isolating the anvil blade from the machine frame of the rewinder. An electrical conductor is coupled to the anvil blade for supplying an electric current to the anvil blade from a current source. The apparatus also includes at least one grounded perforating blade for moving relative to the anvil blade and cooperating with the anvil blade to perforate the web at predetermined points along its length. The perforating blade will contact the anvil blade after perforating the web. A closed circuit is formed and maintained along the anvil blade at points where the blades are in contact with each other. The apparatus further includes means for detecting if a closed circuit has been formed and maintained along the anvil blade when the perforating blade moves into a position where the blades should contact each other.
摘要翻译：本发明提供一种腹板穿孔装置，其包括用于检测和指示装置中的刀片何时被破坏，钝化或以其他方式不能穿孔腹板的系统。该设备通常与回卷机或其它类似的机器一起使用，该机器产生穿孔的产品片材，例如纸张，使用固定砧座组和旋转穿孔刀片。该装置包括至少一个砧座，其包括刀片保持器和位于刀片保持器内的砧座刀片。刀片保持器由绝缘材料形成，用于将砧座刀片与复卷机的机架电隔离。电导体连接到砧座叶片，用于从电流源向砧座叶片提供电流。该装置还包括至少一个接地的穿孔刀片，用于相对于砧座刀片移动并与砧座刀片配合，以沿着其长度的预定点对纤维网进行穿孔。射孔刀片在穿孔腹板后将与砧座刀片接触。在刀片彼此接触的点处，沿着砧刀片形成并保持闭合回路。该装置还包括用于检测当穿孔刀片移动到刀片应该彼此接触的位置时是否已沿着砧座刀片形成并保持闭合回路的装置。

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