1. A mixer for continuously mixing materials in the form of a powder, of grains or of a liquid, more specially synthetic resins, comprising a generally cylindrical, upright mixing vessel (10) in which there are a number of mixing instruments (34, 36 and 38) placed on an upright shaft (22) running into the vessel through the floor (12) of same, said instruments producing a downward current in the middle part of said vessel and an upward current in the outer part of said vessel, an inlet for the continuous inlet of material in the form of a powder, of grains or of a liquid, and an outlet (42) for the ready-processed mixed product in the top side part of the mixing vessel, said outlet (42) having a guide part (44) so positioned thereon that the mixed current of material partly comes out of the vessel and is partly run back into the vessel in a downward direction, characterized in that the inlet is in the form of a filling pipe (30) placed coaxially round the top end of the shaft (22) with a ring-like gap between it and the shaft and in that said ring-like gas phas a funnel (40) placed round it, said funnel being coaxial in relation to said shaft (22).
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