| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve mechanical strength while making it easy to fold a paper lid. <P>SOLUTION: The leading ends of rectangular paper end walls 10 and 12 extend from the basal ends located at the facing edges 6 and 8 of a rectangular paper top panel 4. The leading ends of the side walls 30 and 32 extend from the basal ends of the long sides 26 and 28 of the top panel 4 and are connected with the end walls 10 and 12. The respective leading end sides of the end walls 10 and 12 and sidewalls 30 and 32 are folded inside along folding lines 22, 24, 46, and 48 respectively. Inner wall parts 18, 20, 38, and 40 are stuck to external wall parts 14, 16, 34, and 36 respectively. The end walls 10 and 12 are folded along inclined fold lines 50 and 52 such that the sidewalls 30 and 32 are laid on the top plate 4. In the internal wall parts 18 and 20 of the end walls 10 and 12, through-holes 54 and 56 penetrating to the external walls at the positions superposed on the inclined fold lines 50 and 52, are formed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
