reference to the differences between the present invention and existing equipment in this regard the following united states patents are illustrative of the state of the art and known systems the disclosures of which are hereby incorporated into this description in their entirety by reference referring now to fig1 through 5 the invention will now be described with reference to particular embodiments thereof there is shown in fig1 and 2 a metal pressware die set 10 which includes an upper die half sometimes referred to in the art as the punch 12 and a lower die half sometimes referred to in the art as the die 14 both halves 12 14 are segmented pressware dies as will be appreciated from the discussion which follows die half 12 and die half 14 are mounted about an axis of reciprocation 16 in facing relationship as shown die half 12 comprises generally of an upper base plate 18 provided with a knock out 20 there is additionally provided an annular pressure ring 22 as well as heating coils 24 base plate 18 is provided with forming surfaces such as surface 26 which is used to form the sidewall of a paperboard pressware product it is at such surfaces that temperature control is particularly important as will be appreciated by one of skill in the art there may also be provided a plurality of springs such as spring 28 can be used to bias the various parts typically between 4 and 8 springs are used to individually.