| 摘要 |
<p>PROBLEM TO BE SOLVED: To make a packaging bag reusable as a preservation bag for housed articles after purchase by a method wherein perforations are formed on the surface of a tongue-shaped piece, being in parallel with and running along the turndown side of the tongue-shaped piece, and while a strong adhesive-applied layer is formed at the front end side, a weak adhesive-applied layer is formed at the turndown side with the perforations placed in between. SOLUTION: For a packaging bag 1 that is made up with its one side sealed up and with an opening 2 formed at the other side and equipped at the opening 2 with a turndown tongue-shaped piece 3, a strong adhesive-applied layer 4 in a desired width is formed along the front end side of the tongue-shaped piece 3 and a weak adhesive- applied layer 5 in a desired width is formed along the turndown side at the root-side of the tongue-shaped piece 3. An incision line 6 formed of perforations is formed, being in parallel with the turndown side, at a position between the applied layers 4 and 5. Therefore, when an article is housed again for preservation in the packaging bag 1, the article is inserted again through the opening 2 and the weak adhesive-applied layer 5 is stuck to the packaging bag 1 by turning down the tongue-shaped piece 3 of the packaging bag 1, and thereby the tongue-shaped piece 3 is made to function as a device that can be opened and shut freely.</p> |
