| 摘要 |
The lens is moulded within the mould halves (1,2) between the two form-defining die surfaces (10,23). The piston die (22) carries one of these surfaces (23) on its face and fits tightly in one half (2). It closes down onto the injected lens material (M), moulding it in the cavity (3) enclosed. The second mould half (1) carries the other lens form-defining surface (10) and completes the cavity (3). Following closure, polymerisation takes place. Both the process and the appts. to carry it out are claimed.
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