| 摘要 |
The subject matter of the present invention is a method of producing a packaging box in which a seal (15) is cut and formed from a material having waterproof and heat sealing properties, said seal (15) is inserted in the shape of a bowl into one of the ends of a tubular box body (10) previously produced from a material having waterproof and heat sealing properties, said raised lip of the seal (15) is sealed to the inner face of said body, along the length of a first peripheral sealing area (50), a closing cover (21) is cut from a sheet of a semi-rigid material, this cover (21) is swaged to give it the shape of a bowl with a raised edge, said cover (21) is inserted into said end of said box body (10) above the seal (15), said raised lip of the cover (21) is sealed to the inner face of said box body (10), along the length of a second peripheral sealing area (60), said second peripheral sealing area (60) being separated from said first peripheral sealing area (50) in such a way as to form a free portion of the box body (10) between said first peripheral sealing area (50) and said second peripheral sealing area (60), this free position being able to define a free space (43). |
