Sonoco Development Incorporated

Floyd H Boatwright

Alan D Williams

Michael T Drummond

Jeffrey M Schuetz

J Mark Morrow

Richard M Lowman

James W Lowry

Keith R Rea

Mickey Braddock

Charles M Braddock

Keith Rea

Charles Braddock

A sealed composite container for products is provided having a paperboard body ply with a liner ply adhered on the inner surface thereof. One end of the container is rolled outwardly to form a rim and exposing the inner surface of the liner ply, which comprises a heat sealable composition. A lid for the container, also having a layer of heat sealable composition, is placed adjacent to the exposed heat sealable composition of the container liner and heat sealed thereto. The heat seal has both an inner and an outer bead formed on either side of the heat sealed area, wherein the inner bead comprises a larger amount of the heat seal compositions than the outer bead. A method and apparatus for forming the heat seal is also provided.

Tubular container with a heat seal having non-symmetrical inner and outer beads

A tubular container for vacuum packaging products is provided according to the present invention that includes an overcap secured to at least one of the opposed ends of a tubular container that defines a bias member for biasing a membrane-type flexible lid inwardly towards products contained within the tubular container before a vacuum is applied. The flexible lid is maintained in a biased shape until the bias member is removed. As such, the flexible lid is sufficiently restrained during the vacuum packaging process, thus preventing the breakage of products located adjacent the flexible lid.

Container having a preshaped end closure

A method for induction sealing a plastic part to a composite container using a pair of linear coils electrically connected to low frequency generators. The linear coils produce overlapping electromagnetic fields on either side of the container. Rotating the container assures even heating of the polyethylene liner and plastic part. The method produces a reliable seal between the liner and plastic part and can be used at high production speeds.

Method for induction sealing a plastic part to a composite container

A beaded-top twist container is provided with an inner layer and an outer layer, the outer layer being concentric with the inner layer. The inner layer is joined to the outer layer at the top and bottom edges by a bead. At least one rotatable segment is formed from the outer layer by separating the outer layer into at least three segments, the separations being formed by scoring through the outer layer without destroying the integrity of the inner layer. At least one rotatable segment is formed adjacent to a top or bottom bead by forming a separation adjacent the bead between the inner and outer layers.

Beaded-top twist can and method of making same

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Hartsville, SC, United States of America

Floyd H Boatwright