Make the 1st

摘要

PROBLEM TO BE SOLVED: To improve unsealability when unsealing a tear-off zipper while securing its resistance to breakage during delivery and also to improve easiness to take out a basic letter material.;SOLUTION: A letter pack includes: a first basic material 11 to serve as a rear of a bag; a second basic material 12 having a flap with a crease as a border and longer than the first material at least by a width of the flap to serve as a front of the bag; a first adhesive layer 13 for sticking the second material to the first material along three sides except a side of the flap; a basic letter material 14 to be stored in a bag part formed of the first and second materials; a second adhesive layer 15 for sticking the second material to the basic letter material on predetermined regions on both sides of the crease of the second material; a tear-off zipper 16 formed inside the crease of the second material where it is stuck to the basic letter material for unsealing the bag part; and a seal 17 formed on the rear of the basic letter material overlying the flap of the second material for sealing the flap with the first material.;COPYRIGHT: (C)2006,JPO&NCIPI