| 摘要 |
The invention refers to a machine for packaging envelopes, bags or similar of the type including means suitable for unwinding from a reel plastic sheeting, superimposing and welding the side edges, and means suitable for cutting to size sections of the tubing produced and welding the ends obtained from the cut. The means suitable for cutting the tubing and welding the ends comprise two parallel sliding bars at right-angles to its own axis. The bars are connected to the respective cinematic motion connecting rod crank with reciprocally integral cranks, which rotate around a single axis being opposite in relation to this and connected to a single piston device suitable for making them carry out alternating movements. |
