B29C 65/7437

Joining {or sealing} of preformed parts {, e.g. welding of plastics materials}; Apparatus therefor by welding and severing {, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc the tool being a perforating tool }