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1. 发明授权

US06471799B1 Method and device for producing gypsum boards 有权
标题翻译：生产石膏板的方法和装置
公开(公告)号：US06471799B1
公开(公告)日：2002-10-29
申请号：US09623513
申请日：2000-12-06
申请人： Kunitoshi Sasaki , Mikiyoshi Simojima , Shouichi Endo , Shinji Yonezawa
发明人： Kunitoshi Sasaki , Mikiyoshi Simojima , Shouichi Endo , Shinji Yonezawa
IPC分类号： B32B1308
CPC分类号： B28B19/0092 , B28B17/0081
摘要： Provided are a process and an apparatus for producing gypsum boards, both of which feature minimized occurrence of defective products and especially excellent continuous productivity and superb efficiency. Making use of the facts that lining paper sheets for gypsum boards are insulators and a gypsum slurry held between the lining paper sheets is a good electrical conductor, a detection of an electric current flowing between an upper forming unit and a lower forming unit or a like method makes it possible to promptly detect any localized tearing which may occur in the overlay paper and/or underlay paper due to an undesired object or the like mixed in during continuous production of gypsum boards and moreover, to readily remove the undesired object or the like as a cause for the tearing without stopping the production of gypsum boards while preventing the localized tearing from spreading over the entire width of the paper. The production process and apparatus, therefore, permit stable and continuous production of gypsum boards.
摘要翻译：本发明提供一种生产石膏板的方法和装置，其特征在于最小化缺陷产物的出现，特别是优异的连续生产率和极好的效率。利用将石膏板的纸张排列为绝缘体的事实，保持在内衬纸之间的石膏浆料是良好的导电体，检测在上部成形单元和下部成形单元等之间流动的电流方法使得可以在连续生产石膏板期间由于不期望的物体等而迅速检测可能在覆盖纸和/或底纸中发生的任何局部撕裂，此外，容易地去除不需要的物体等作为撕裂的原因，而不停止生产石膏板，同时防止局部撕裂在纸张的整个宽度上扩展。因此，生产工艺和设备可以稳定连续生产石膏板。

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