| 摘要 |
<p>1,253,913. Packaging. TETRA PAK A.B. 13 June, 1969 [27 June, 1968], No. 30081/69. Heading B8C. In a container made from a foam plastics material comprising a body 1, a bottom 2 and a cover 5 of metal foil covering the opening 3, the edge portion 4 of the cover 5 is folded down whilst being pleated so as to bear against the outside of the body and the cover and the body are united to form a leakproof joint by the plastics material being caused to swell to fill the pleats 6 along the edge portion 4. As shown, the inner surface of the cover 5 is coated with a heat sealable varnish and the edge portion is provided with a pull tab 7 for removal of the cover, which may be provided with a tear line 8.</p> |
