| 摘要 |
PROBLEM TO BE SOLVED: To provide an envelope which can be easily unsealed by hand without using any tools such as scissors and a cutter. SOLUTION: A small wire 3 is stretched along an inner folding line 2a of a sealing piece 2 of an upper opening 1a of an envelope body 1, each end of the small wire 3 is returned at right and left ends of the inner folding line 2a, and adhered to an upper adhesive surface 4a of a triangular double coated adhesive piece 4 arranged on a face side of the envelope, an upper red holding paper 4d is adhered thereto from a top thereof, and fixed to an upper corner part of the envelope body 1 by a lower adhesive surface 4c of the double coated adhesive piece 4. A perforation 5 is provided in the envelope body 1 and the sealing piece 2 along a diagonal side of the double coated adhesive piece 4 symmetric to the inner folding line 2a. A perforation 6 is provided along the inner folding line 2a.
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