Process for manufacturing a can lid
AssigneeSwiss Aluminium Ltd.
InventorSiegfried Bloeck
Life of this patent
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Abstract
Can lids made of metal, lacquered on both sides and featuring a pouring outlet covered over with a closure strip having a sealing surface of polyamide, often exhibit inadequate bond strength between the closure strip and the lacquered can lid surface. The bond strength can be increased if the can lid, after the closure strip has been sealed onto it, is heated until the polyamide melts and then the can lid with closure strip is subsequently cooled.
Claims2
A process for manufacturing a metal can lid which is lacquer-coated on both sides and provided with a sealed-on closure strip having a sealing surface of polyamide covering the pouring outlet of the lid comprising heating the can lid after the closure strip has been sealed thereon until the polyamide melts and thereafter cooling the can lid.
Dependencies are inferred from the claim text.