| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for forming an opening capable of preventing liquid contents or the like from flowing swiftly and preventing them from dripping and capable of quickly returning them to the inside from the opening by forming corrugated creases in the middle of the spout opening of a conventional opening type paper pack or the like so that an inclined angle has a larger obtuse angle. <P>SOLUTION: The method for forming the opening in the opening type paper pack or the like includes forming the corrugated creases in the middle of the spout opening of the paper pack so that an inclined angle has a larger obtuse angle. This prevents liquid or the like in the paper pack from flowing swiftly in use. Further, the corrugated creases make it possible to prevent dripping of liquid contents or the like or to quickly return the liquid contents or the like to the inside from the opening. <P>COPYRIGHT: (C)2009,JPO&INPIT |
