The "Hot-Air Welding Machine" is designed according to the hot-breeze theory, will be a more efficient companion for advertising material instead of the glue.The equipment is also called PVC Welder,"Poster Welder Without Glue", "Seaming Machine" , "Heat-Jointer", "hot air welder", "heat welder", "banner welder"," welder", "hot air welding machine"," welding machine", "hot seaming machine" and "seamer", it is the professional designs for seaming pieces made of heat-meltable materials. Model 4000i is the Advanced type developed from 4000H:- Well seam pieces made of heat-meltable materials,such as PVC & PE fabric Canvas, Sailcloth, Textilene...etc., without glue.- Small in volume, portable and light. - Save more manpower and cost on process. - Automaticly self-moveable, Automatic start. - High welding speed. - Assembled with nice and wearable spare parts. - Constructed simplely, easy to maintain. - Easy and comfortable operation, needs not much guide. - Proper pack for transport.- Digital display for controlling temperature and speed and the fan.- With new functions of automatic sleepy mode and adjustable hot-air blowing rate. It may make a good seaming effect under relatively low temperature at work, this is sure to help saving more energy in use. - Proper packed up for transport, with shook-proof packing.- Needs only home power at work.