Method of connecting a gripping device to a sheet or web-formed packaging laminate
AssigneeAB Profor
InventorAnders Sjostrom
Life of this patent
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Abstract
A method of attaching a gripping device to a packaging laminate involves forming a recess in a packaging laminate that extends only a part of the way through the thickness of the packaging laminate. Molten plastic material is injected into the recess to cause the molten plastic material to become partly united with plastic layers that cover the central carrier layer of the laminate, thereby forming an anchorage device in the laminate. The gripping device can be attached to the anchorage device after the injection molding process or simultaneously during the injection molding process.
Claims9
A method of attaching a gripping device to a packaging laminate comprising the steps of:
- forming the packaging laminate with a recess, wherein said packaging laminate includes a central carrier layer, a first plastic layer on one side of the central carrier layer, a second plastic layer on an opposite side of the central carrier layer, a gas-tight barrier layer on the second plastic layer and a third plastic layer on the barrier layer, said recess extending through only said first plastic layer and said central carrier layer;
- placing one part of an injection molding tool against the first plastic layer in surrounding relation to the recess, and placing another part of the injection molding tool which has a depression formed therein against the third plastic layer at a position opposite the one part of the tool;
- delaminating the second plastic layer from the central carrier layer around said recess;
- injecting molten plastic material under pressure through a channel in the one part of the tool and into the recess to cause the molten plastic to penetrate the delaminated region and to cause the molten plastic to be partly united with the first and second plastic layers while also causing the second plastic layer, the barrier layer and the third plastic layer to be urged into the depression, thereby forming an anchorage device;
- and
- attaching a gripping device to the anchorage device.
A method of forming an anchorage device on a packaging laminate which includes a central carrier layer, a first liquid-tight plastic layer on a first side of the central carrier layer and a second liquid-tight plastic layer on an oppositely positioned second side of the central carrier layer, comprising the steps of:
- forming the packaging laminate with a recess that extends through only the central carrier layer and the first plastic layer;
- placing one part of an injection molding tool against the first plastic layer and in surrounding relation to the recess, and placing another part of the injection molding tool against an opposite side of the packaging laminate;
- injecting molten plastic material through the one part of the injection molding tool and into the recess to cause the molten plastic material to penetrate a delaminated region located between the central carrier layer and the second plastic layer in an area surrounding the recess and to cause the molten plastic material to become united with the first and second plastic layers, thereby forming an anchorage device in the packaging laminate to which a gripping device may be attached.
A method of forming an anchorage device on a packaging laminate so that a gripping device can be attached to the packaging laminate, comprising the steps of:
- providing a first liquid-tight plastic layer on a first side of a carrier layer;
- forming a hole that extends through the carrier layer and the first plastic layer;
- forming the packaging laminate by applying a second liquid-tight plastic layer on a second side of the carrier layer which is opposite to the first side so that said hole is covered at one end by said second plastic layer;
- enclosing said hole with an injection molding tool;
- and
- injecting molten plastic material into said hole to cause the molten plastic material to become united with the first and second plastic layers, thereby forming an anchorage device in the packaging laminate to which a gripping device may be attached.
Dependencies are inferred from the claim text.