| 摘要 |
1535708 Plug and bush combinations TETRA PAK DEVELOPPEMENT SA 28 Jan 1977 [4 Feb 1976] 03514/77 Heading B8T A closure of the kind comprising a bush part 3 and a plug part 2 separable from the bush part by rupture of an interconnecting wall 4 is secured and sealed to a downwardly convergent inturned flange 11 by co-operation of the terminal edge thereof with an annular groove 14 and the radially inner surface 17 of the flange with an annular sealing rib 15 situated at the upper edge of the groove 14. |
