| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a top open type paper carton in which, upon inserting the hand into a body of the carton to take out a content, it is prevented that the inserted hand is given a scratch. <P>SOLUTION: Respective incisions constituting right and left two perforated lines L<SB POS="POST">2</SB>on a top panel include: main incision parts formed in a breaking direction; frontal bent incision parts each extending diagonally outward at an obtuse angle from each of ends on an upstream side of the breaking direction, of the main incision parts; and rear bent incision parts each extending diagonally outward at an obtuse angle from each of ends on a downstream side of the breaking direction, of the main incision parts. Here, angles and lengths of the frontal bent incision parts and the rear bent incision parts are determined so that positions of distal ends of the respective frontal bent incision parts are located outside than those of the respective rear bent incision parts, and virtual extended lines of the rear bent incision parts abut the frontal bent incision parts. The breaking of the perforated lines L<SB POS="POST">2</SB>progresses by causing the rear bent incision parts to continue the frontal bent incision parts from their distal ends. Triangular protrusions generated by breaking of the perforated lines L<SB POS="POST">2</SB>consecutively remain along edges of the raised opening section, and, at the same time, only triangular notches are consecutively formed along edges of an opening formed on the top panel 14 while no projections remain. <P>COPYRIGHT: (C)2012,JPO&INPIT |
