Multi-layer laminated preform and method of its manufacture
AssigneeCrown Cork & Seal Technologies Corporation
InventorStephen W. Cornell
Life of this patent
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Abstract
A blank (2) is molded for the manufacture of a multi-layer preform (1). The blank possesses protrusions (5). After the protrusions (5) have been brought to a plasticised state under the action of heat, those surfaces that contain protrusions (5) are covered by a layer of plasticised material. The blank (2) becomes connected to the layer (6) in the area of the protrusions (5). After cooling of the preform created from the blank (2) and the layer (6), the blank (2) will be connected with the layer (6) by means of microweld positions (7) in the area of the said protrusions (5). With that, delamination of the preform (1) during further processing or use-will be effectively prevented.
Claims9
A blow moldable preform for making a closeable container, said preform made from a blank having one or more covering layers and comprising:
- (a) a blank provided with a plurality of protrusions on at least one side;
- and
- (b) at least one cover layer
- (1) engaging the side of the blank that has said protrusions thereon, and
- (2) forming a connecting zone by a plurality of thermally produced microweld positions.
A blow moldable preform for making a closable container, said preform made from a blank, having one or more covering layers, wherein the adjacent surfaces of two layers are bonded with one another in a connecting zone, said connecting zone comprising a plurality of thermally produced microweld positions.
Dependencies are inferred from the claim text.