| 摘要 |
A corrugator comprising a curved base element (14) rotatable around an axis of rotation; and a flat base element (12) translatable relative to said axis of rotation, said base elements (12, 14) having a plurality of corresponding corrugation formers (24) such that a flexible material (26) may be fed between said base elements (12, 14), the corresponding corrugation formers (24) interdigitating such that said flexible (material 26) is folded at a non-elevated temperature by the co-operation of the corrugation formers (24) so as to create creased corrugations (25) in the flexible material (24). |
