Patent ID: 6932753

Claim:
A pressing apparatus for producing from a paperboard blank a food service paperboard container having an overturned rim provided with folds, comprising: a first die that includes a first base and a first platform movable with respect to the first base, said first base having a curved surface for engaging an outer periphery of a paperboard blank; a second die positioned in opposing relation to the first die and including a second base and a second platform movable with respect to the second base, said second die being movable with respect to the first die, said second base having a curved surface for mating with the curved surface on the first die and engaging the outer periphery of the paperboard blank so that the outer periphery of the paperboard blank is pressed between the curved surface of the first base and the curved surface of the second base; a first cast-in heater mounted within a recess in the first die, the first cast-in heater including a resistor wire embedded within a thermally conductive cast-in material; and a second cast-in heater mounted within a recess in the second die, the second cast-in heater including a resistor wire embedded within a thermally conductive cast-in material.