A method of heat sealing a container closure section liquid proof
OwnerWilhelm KULLBERGinventor
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Abstract
A method of compressing & heat sealing a container closure “junction” of a 180° folded polymer coated, medium to heavy gauge, paperboard panel edge, between a polymer coated paperboard panel and a polymer coated film element edge, liquid proof.
Claims15
A method of compressing & heat sealing an inside liquid container closure “junction” having a 180° folded polymer coated. paperboard panel edge between a polymer coated paperboard panel and a polymer coated film element edge area, wherein the 180° folded polymer coated paperboard panel edge and inside of the polymer coated paperboard panel, overlapping the polymer coated film element edge, characterized in that the folded, compressed, & pre-sealed container closure junction is compressed & heat sealed from the external container side by a punch having a hard ball formed forehead, said hard ball formed forehead is flexible and moving sideways after imprinting the containers said external polymer coated paperboard panel by hitting the 180° folded polymer coated paperboard edge during compression, heat sealing said 180° folded polymer coated paperboard edge between the containers outside said polymer coated paperboards inside panel and said polymer coated film element edge liquid proof without braking the polymer coating of the 180° folded paper board edge.
A method of compressing & heat sealing an inside section of a container closure for liquids according to clams 1 & 2, characterized in that the compression & heat sealing punch ball shaped forehead is moving sideways, guided by the cartons 180° folded polymer coated paperboard panel edge during compression.
Dependencies are inferred from the claim text.