mechanisms will be well known to one skilled in the art but an example not to be construed as limiting would be a gear pump or other such device that feeds melt by a process of pushing melt at a volumetrically controlled rate the melt is then supplied to a station 11 which is a means for applying a strain rate to the melt and in which the melt is subjected to vibrational or rotational shear in general in a station such as item 11 the state of shear that the melt is subjected to is defined by a gap through which the melt is forced to pass defined herein by a width h 11 the gap width is optionally variable as a function of time and position in the station the shear state of the melt is then a result of an interaction between the viscosity of the melt and hence its temperature and the rate and hence frequency at which the shear is applied to the melt item 2 in fig1 is then a melt feeder similar to item 10 which feeds the melt to a second station 22 which is a second means for applying to strain rate to the melt a gap h 22 is associated with 22 from the second station 22 the melt then passes to a device 3 which controls the volumetric flow rate at the exit of 22 and may be a third melt feeder to another station down the line items 111 222 and 333 represent intermediary zones in which the melt is transiting between treatment stations such as in item 222 or see 111 and 333 before and or after a volumetric controlling device respectively 1 and.