Containers

Details Containers Containers

B - Operations, Transporting

29

C

18/650

B29C 67/20 (2006.01)

Patent

CA 1248315

ABSTRACT OF THE DISCLOSURE Increasing the wall strength of a cup having a closed cell foam wall and a solid plastic coating on at least the outer surface therof by contacting said surface of the cup with a heated mandrel. Apparatus is shown comprising a rotatable turret, means to drive said turret, a plurality of mandrels mounted on the turret, means to heat said mandrels, means to apply vacuum and gas under pressure to each of the mandrels at preselected positions on the turret, means to feed cups to a mandrel in a first position, and means to convey cups from a mandrel in a second position. The mandrels may be electrically heated with a temperature being controlled by a thermocouple connected to a controlled power source.

561806

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