Reclosable flap device
AssigneeOpm Advance Limited
InventorsIan David Michael Bell, Christopher John Ellison
Life of this patent
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Abstract
A resealable flap device in the form of a sheet, for applying to or incorporating in packaging, comprises: a lower layer of flexible material, and an upper layer of stiff material. The sheet is cut through both layers to outline a flap portion, the cut leaving an edge in a hinge region, the upper layer being removed behind the line of the hinge region. In this way the flexible lower layer forms a hinge that is easy to handle and does not spring back, while the stiff upper layer maintains the shape of the flap.
Claims20
A resealable flap device in the form of a sheet for applying to or incorporating in packaging, the flap device comprising:
- a lower layer of material, having an adhesive layer on a lower side;
- and
- an upper layer of material, bonded to the lower layer;
- wherein the sheet is cut through both layers to outline a flap portion, the cut leaving an edge intact in a hinge region at the rear of the flap portion, behind which is a rear region of the flap device;
- wherein the upper layer of the flap portion is not present in the rear region beyond a line of the hinge region;
- and
- wherein the upper layer is at least twice as stiff as the lower layer.
A resealable flap device in the form of a sheet for applying to or incorporating in packaging, the flap device comprising:
- a lower layer of material, having an adhesive layer on a lower side;
- and
- an upper layer of material, bonded to the lower layer;
- wherein the sheet is cut through both the upper and lower layers to outline a flap portion, the cut leaving an edge intact in a hinge region at a rear of the flap portion, behind which is a rear region of the flap device;
- wherein the upper layer is not present in the rear region beyond a line of the hinge region;
- and
- wherein the lower layer comprises PP and is 40-60 μm thick, and the upper layer comprises PET or PS and is at least twice as thick as the lower layer.
Dependencies are inferred from the claim text.