| 摘要 |
<p>A packaging container (40) is formed from a blank (32) cut from a sheet of semi-rigid material such as cardboard which forms an outer layer of the package (40). The outer layer blank (32) is secured to an inner film layer (34) so that at least part of the outer layer blank (32) is adhered to the inner film layer (34). The inner film layer (34) is of dimensions such that it extends beyond at least one edge of the outer layer blank (32). The blank is formed into a tubular construction by folding with the film layer (34) innermost. The ends of the tubular construction are closed by forming a transverse seam across the portion of the film layer (34) which extends beyond the tubular construction or by folding in flaps formed around the periphery of the end of the tubular construction. The flaps are secured together by gluing or welding. The resulting package is sift-proof and, at the same time, capable of being formed in a single manufacturing procedure. The packaging container (40) may additionally be formed so that folding out apart of the outer layer exerts a force on the transverse seam formed in the film layer (34) to facilitate opening of the container.</p> |
