Cup forming mandrel, method, and article

Details Cup forming mandrel, method, and article Cup forming mandrel, method, and article

B - Operations, Transporting

29

C

18/653

B29C 17/02 (1980.01) B29D 27/00 (1980.01)

Patent

CA 1168010

ABSTRACT OF THE DISCLOSURE A mandrel for forming a container made of foam plastic sheet material. The mandrel defines the internal con- figuration of the container and also is used to form a rim on the top edge of the container. The container rim is formed by first expanding the rim in diameter by means of cam actuated segments which extend radially outward from within the con- finement of the mandrel structure. Subsequent to the diametrical expansion of the rim, the container, including the exterior of the mandrel, undergoes a translation along the mandrel longitudinal axis, thus causing the container rim to fold back upon itself, thus forming a lid receiving bead. A method of making the container is also disclosed

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