| 摘要 |
The "infinite thread" safety cap is formed by a cap or part (Fig. 2) which is inserted (a) in another cap or part (Fig. 1) which is slightly larger. By means of the internal parts or mechanisms of both 2 and 6 and by rotating to the right it will thread just like any other cap. If the outer cap (Fig. 1) is pressed downwards at the same time as rotation is to the left, the safety part 1 will abut against the spherical head 8, will yield and the mechanisms or parts 3 and 7 which are in each of the caps will engage with one another and it will be possible to open it. If the outer cap is rotated to the left without downward pressure, the cap will remain in an infinite thread and it will not be possible to effect opening. <IMAGE>
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