| 摘要 |
1, 049, 200. Nets. PLASTIC TEXTILE ACCESSORIES Ltd. Dec. 2, 1964 [Dec. 18, 1963], No. 49934/63. Heading D1K. [Also in Division B5] A net formed from an extruded foamed plastics material, e.g. polystyrene, is rendered flexible by providing compression lines 1 extending transversely to the direction of extrusion. The effect of the compression lines is that the plastics material is compressed along each line and the cellular structure crushed and collapsed. Further compression lines may be provided at right angles to the transverse lines. The compression lines are formed on one or both faces of the net by fluted rollers after it has previously passed through a water bath where it experiences a first stage expansion and then through a steaming chamber where it is subjected to a final stage expansion. |
