| 摘要 |
Apparatus for forming a tube, preferably of flexible thermally insulating material, comprises a cutting head 14 with a pair of concentric cutting edge 16, 18 which cooperates with a presser head 28 to cut rings 50 of material from a sheet 48 presented to the cutting head. The rings are stacked up on a guide bar 32 and sprayed with a coating composition to consolidate them into a tube which may be collected on a take-up drum in a continuous manner. |
