| 摘要 |
1302116 Moulding tubes ABBOTT LABORATORIES 15 April 1970 [9 May 1969] 18050/70 Heading B5A [Also in Division F2] A flow control device (11) (see Division F2) comprises a tubular body (13) injection or compression moulded from a material such as polypropylene or polystyrene such that the jaws (15), (16) are moulded integrally with the tubular body at right angles to its axis. The parting line of the mould is positioned at the uppermost portion of the body (13). As the jaw mould is withdrawn, the hinges (19), (20) and jaws (15), (16) remain in the mould momentarily to orientate the molecules in the hinges. |
