The series Elipse uses a smooth or slightly grooved barrel. Originally it is the first extruder which appeared in 1950. They have the advantage of being universal (for each kind of polymere that is known) and being of an interesting cost for a given screw diameter, however the maximal flow volume is limited. Komax offers these machines optional with slightly grooved barrels. Slightly grooved means that the size of the grooves is smaller than the size of the granulate material. Consequently it is not about an increase of the mass but of the stability. In some cases this technology is essential for a correct extrusion. This series is available in two versions, as a C version for the coextruder (mobile machine) and as an E version for the extruder which are mainly fixed.