| 摘要 |
<p>A device for making sealed pillow shaped sacks with inbuilt valves from woven fabric and an automated process of making such sacks is disclosed. The device comprises a conveying platform for conveying the fabric to various stations of the device, an inward fold making station and sealing stations. The automated process of making pillow shaped sacks with inbuilt valves begins with providing tubular fabric which is cut to a specific length and preferably folded and sealed to form one sealed end. The step of folding is important for ensuring that the filled material does not leak from the sealed end. This is followed by processing of the other end into forming an inward fold, further followed by folding and sealing of the free end of the sack such that a filling valve is formed and rest of the sack is fully sealed.</p> |
