Container lid with an opener device
AssigneeRobert Bosch GmbH
InventorNorbert Buchner
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Abstract
A lid for a packaging container including an easy opening tear-open part which is surrounded by a weakened line. The lid is molded from a compound material, which has an outer carrier layer of plastic, a middle barrier layer of metal foil and an inner heat-sealing layer of a thermoplastic material. In order to facilitate the initial tear of the tear-open part, the middle barrier layer is also thinned or ruptured at least in the starting segment in a location coinciding with the weakening line in the carrier layer.
Claims18
A container lid comprising an outer, relatively thick carrier layer of a thermoplastic material, an inner sealing layer made of a thermoplastic material and adapted to be heat sealed to a container body, a middle barrier layer preferably comprising a thin metal foil, a weakened line stamped into the carrier layer and surrounding a tear-open part, wherein said barrier layer is weakened along a line coinciding in location with said weakened line in the carrier layer, at least in the area in which the tear is iniatially started.
A method of forming a tear-open part in a three layer lid of a container comprising an outer layer, a barrier layer and an inner layer, which comprises:
- forming a notch in the surface of the outer layer of said lid which notch forms an outline of an opening to be made in said lid,
- weakening said barrier layer along a line coinciding with said notch formed in said outer layer, and
- applying a grip top to said outer layer along said notch in said outer layer.
Dependencies are inferred from the claim text.