a plurality of spin beams although heating with heat transfer medium is illustrated in fig1 as the operational heating system the spin beam according to the invention also encompasses other embodiment forms of the operational heating system such as electrical trace heating of the melt conducting components for example these are known in the art the same also applies to the figure which follows fig2 shows a variant of spin beam 3 illustrated in fig1 in this case regeneration heating means 16 are based on additional electrical heating of spin beam 3 although hot air does not flow through the cavity in the spin beam here a collection reservoir 8 4 for the heat transfer medium is nevertheless provided since as a rule the heat transfer media used are not heat resistant in the regeneration temperature range residues of the heat transfer medium remaining in spin beam 3 evaporate during the regeneration process and are discharged by an exhaust means 20 the spin beam is typically well insulated from the outside whereas the interior components conduct heat relatively well in this manner and by the heat radiation inside spin beam 3 a sufficiently uniform heat distribution is achieved the requirements for uniformity of temperature being less stringent for the regeneration process than for the spinning operation the number of regeneration heating means 16 and their particular location are deduced from the design of spin beam 3 and can be appropriately designed by one skilled in the art regeneration heating means 16 are designed as heating coils heating rods etc and transfer the heat by means of heat conduction or heat radiation here as well regeneration heating means 16 may be.