CAP WITH BUILT-IN UNSEALING BLADE,申请号JP19990160817-传众专利搜索

CAP WITH BUILT-IN UNSEALING BLADE

申请公布号：JP2000344264(A)

申请号：JP19990160817

申请日期：1999.06.08

申请公布日期：2000.12.12

申请人：

TOPPAN PRINTING CO LTD

发明人：IWASAKI AKITAKA;KAKIGI NORIKAZU

分类号：B65D5/74;B65D47/36

主分类号：B65D5/74

摘要：PROBLEM TO BE SOLVED: To provide a cap with a built-in unsealing blade not generating the fear of forming pinholes on a sealing film for sealing an injection opening of a paper container for a liquid when a cap with a built-in unsealing blade is protruded on the upper face of an outer peripheral edge of the injection opening of the paper container for the liquid by heat fusion welding in the ultrasonic fusion bonding process. SOLUTION: A cap formed of a spout and a cap main body with a built-in movable unsealing cylindrical body is protruded on the upper face of an outer peripheral edge of an injection opening of a paper container for a liquid sealed with a sealing film by the ultrasonic fusion bonding process, and when the cap screwed on the spout is rotated in the removing direction, the unsealing cylindrical body is lowered to break the sealing film by an unsealing blade provided on the lower end face, and a fusion bonding ring 121 provided on the lower face of a flange 120 formed around the lower end of an injection cylinder 110 of the spout 100 is formed of an upper base section 121a and a lower end section 121b, and the sectional shape of the upper base is formed into a longitudinal shape, while the sectional shape of the lower end is formed into the reverse trapezoid shape.