| 摘要 |
987, 090. Nets. UNION CARBIDE CORPORATION. Nov. 26,1962 [Dec.15, 1961], No. 44567/62. Addition to 880, 236. Heading D1K. [Also in Division B5] In the manufacture of thermoplastic net as described in the parent Specification in which the extruded net 18 is stretched by a mandrel 12, the net is passed through a sizing ring 14 positioned between the mandrel 12 and rollers 16. The sizing ring has an internal diameter less than the diameter of the mandrel and is made of a smooth material e.g. stainless steel. |
