Envelopes – wrappers – and paperboard boxes – Paperboard box – Variable volume
Patent
1999-02-19
2000-04-25
Garbe, Stephen P.
Envelopes, wrappers, and paperboard boxes
Paperboard box
Variable volume
229 45, 229 55, 220609, 220620, B65D 500
Patent
active
060534001
ABSTRACT:
A container has a movable end closure for accommodating expansion or contraction of the product packaged therein. The container includes a hollow body portion with opposed open ends and an inside surface and an end closure positioned at each of the open ends of the hollow body portion and secured thereto for closing the container with product contained therein. One of the end closures is of a generally cup-shaped configuration and has a radially-extending central portion of generally the same configuration and dimensions as the inside surface of the body portion and an accordion-folded sidewalk extending axially from the central portion toward the body portion open end to define a free end area secured to the inside surface of the body portion at the open end. This end closure is positioned so that the central portion may axially move along the body portion inside surface toward or away from the body portion open end by contraction or expansion of the end closure accordion-folded side wall to increase or decrease the effective volume of space within the container.
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Garbe Stephen P.
Mai Tri M.
Sonoco Development Inc.
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