Cup forming mandrel

Details Cup forming mandrel Cup forming mandrel

1979-11-09

1981-07-21

Czaja, Donald E.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Including product handling means

264296, 425393, 425394, B29C 1702, B29G 700

Patent

active

042795850

ABSTRACT:
A mandrel for forming a container made of foam plastic sheet material. The mandrel defines the internal configuration 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 confinement 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.

REFERENCES:
patent: 3557275 (1971-01-01), Longshaw et al.
patent: 3961113 (1976-06-01), Marco

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