| 摘要 |
1,200,302. Seaming non-metallic sheet material. COMTEX Ltd. 25 Jan., 1968 [25 Oct., 1966], No. 47913/66. Addition to 1,148,613. Heading B5K. [Also in Division B8] The apparatus of the main Specification is modified in that the air ducts from which air flows to the heater blocks are used as a framework to support the blocks and the belts or chains. The ducts are in the form of box members 16 having blowers 24 at one end and connections 25 to the heater blocks 21. The ducts are joined by cross-members 17. Belts (not shown) are provided above the bag mouth guides 20. The heater blocks may be as described in Specification 1,200,303. The apparatus is shown tilted back 90 degrees from its working position. |
