초록 ▼

A container assembly is provided which comprises a composite tubular body having an outwardly rolled top rim which body has an asymmetrically tabbed membrane-type closure sealingly secured to the rolled rim so that the peripheral section of the closure conforms radially and circumferentially to an u

A container assembly is provided which comprises a composite tubular body having an outwardly rolled top rim which body has an asymmetrically tabbed membrane-type closure sealingly secured to the rolled rim so that the peripheral section of the closure conforms radially and circumferentially to an upwardly facing annular area of the rolled rim. The method of making the container subassembly comprises induction heat sealing a membrane-type closure comprising an electrically conductive sheet to a composite tubular body comprising an electrically conductive liner with electrical insulation means and heat activatable sealant disposed therebetween. The method further comprises biasing the peripheral section of the closure towards the rolled rim with a uniformly distributed force while the induction heat sealing is being effected.

대표청구항 ▼

A method of induction heat sealing an asymmetrical-shape closure to a tubular body having an outwardly rolled top rim with electrical insulation means disposed intermediate said closure and said rim, said closure comprising a disc portion and an integral radially extending tab, said tab being folded

A method of induction heat sealing an asymmetrical-shape closure to a tubular body having an outwardly rolled top rim with electrical insulation means disposed intermediate said closure and said rim, said closure comprising a disc portion and an integral radially extending tab, said tab being folded upwardly and radially inwardly so that it lies superjacent the top surface of said disc portion, said closure comprising an electrically conductive sheet, said body comprising an electrically conductive liner, said method comprising the steps of: a. juxtapositioning said closure on said rim with said electrical insulation means disposed intermediate the bottom surface of the peripheral section of said disc portion and said rim, b. biasing said peripheral section towards said rim with a uniformly distributed force, c. simultaneously subjecting adjacent portions of said electrically conductive sheet, electrical insulation means, and said electrically conductive liner to a high frequency electrical field of sufficient constant intensity to independently inductively heat said adjacent portions of said sheet and said liner to cause heat activatable sealant disposed intermediate said adjacent portions to be conductively heated to a sufficiently high bonding temperature to sealingly secure said adjacent portions together along a circumferentially extending seam, d. terminating said field to enable said sealant to cool to A sufficiently low temperature to set said seam, and e. terminating said biasing.