초록 ▼

A peelable lid structure, particularly for use in the closing of food cans, has a tab which is folded over the center panel and secured in the folded position for processing of can contents and/or handling operations. As the tab is secured, an inexpensive laminate structure which requires little or

A peelable lid structure, particularly for use in the closing of food cans, has a tab which is folded over the center panel and secured in the folded position for processing of can contents and/or handling operations. As the tab is secured, an inexpensive laminate structure which requires little or no aluminum content can be used. Methods of forming the peelable lid structure include exposing a layer of heat sealable material and/or an adhesive layer so that the tab (3) can be folded over and adhered to this layer, for example, by heat sealing.

대표청구항 ▼

What is claimed is: 1. A peelable lid structure for a container, the peelable lid structure including: a barrier layer for preventing the passage of fluids; and a tab extending from a centre panel of the peelable lid structure for removing the peelable lid structure from the container to allow acce

What is claimed is: 1. A peelable lid structure for a container, the peelable lid structure including: a barrier layer for preventing the passage of fluids; and a tab extending from a centre panel of the peelable lid structure for removing the peelable lid structure from the container to allow access to the container contents; in which the barrier layer includes less than 20 microns thickness of aluminum; and in which the tab is folded over the centre panel and secured in the folded position on the centre panel for processing of can contents or handling operations; wherein the tab or centre panel includes a patch, an area of which is exposed by a hole in the tab or centre panel respectively, and the tab is secured in the folded position by bonding to the exposed area of the patch. 2. The peelable lid structure as defined in claim 1, wherein the aluminum layer is not more than 15 microns in thickness. 3. The peelable lid structure as defined in claim 1, wherein the peelable lid structure includes one or more of the following layers: polyethylene terephthalate (PET), aluminum, nylon or polypropylene. 4. The peelable lid structure as defined in claim 1, wherein the tab is secured in the folded position by an adhesive or by heat sealing. 5. The peelable lid structure as defined in claim 2, wherein the peelable lid structure includes one or more of the following layers: polyethylene terephthalate (PET), aluminum, nylon or polypropylene. 6. The peelable lid structure as defined in claim 1, wherein the patch includes a discrete piece of material, or an outer part of the tab which is folded over a hole on an inner part of the tab. 7. The peelable lid structure as defined in claim 1, wherein the hole is formed in the centre panel of the peelable lid structure, the hole covered by the patch being fixed to a first side of the centre panel to form an area of patch exposed by the hole on the opposite side of the centre panel, the tab covering the exposed area of patch when in the folded position, the tab secured in the folded position by bonding to the exposed area of the patch. 8. The peelable lid structure as defined in claim 1, wherein the hole is formed in the tab of the peelable lid structure, the hole covered by the patch being fixed to a first side of the tab to foam an area of patch exposed by the hole on the opposite side of the tab, the exposed area of patch being covered when the tab is in the folded position, the tab secured in the folded position by bonding to the exposed area of the patch. 9. A peelable lid structure for a container, the peelable lid structure including: a barrier layer for preventing the passage of fluids; and a tab extending from a centre panel of the peelable lid structure for removing the peelable lid structure from the container to allow access to the container contents; in which the barrier layer extends from the centre panel into the tab and includes less than 20 microns thickness of aluminum; and in which the tab is folded over the centre panel and secured in the folded position on the centre panel for processing of can contents or handling operations; wherein the tab or centre panel includes a patch, an area of which is exposed by a hole in the tab or centre panel respectively, and the tab is secured in the folded position by an adhesive or by heat sealing to the exposed area of the patch. 10. The peelable lid structure as defined in claim 9, wherein the aluminum layer is not more than 15 microns in thickness. 11. The peelable lid structure as defined in claim 9, wherein the peelable lid structure includes one or more of the following layers: polyethylene terephthalate (PET), aluminum, nylon or polypropylene. 12. The peelable lid structure as defined in claim 9, wherein the patch includes a discrete piece of material, or an outer part of the tab which is folded over a hole on an inner part of the tab. 13. The peelable lid structure as defined in claim 9, wherein the hole is formed in the centre panel of the peelable lid structure, the hole covered by the patch being fixed to a first side of the centre panel to form an area of patch exposed by the hole on the opposite side of the centre panel, the tab covering the exposed area of patch when in the folded position, the tab secured in the folded position by bonding to the exposed area of the patch. 14. The peelable lid structure as defined in claim 9, wherein the hole is formed in the tab of the peelable lid structure, the hole covered by the patch being fixed to a first side of the tab to form an area of patch exposed by the hole on the opposite side of the tab, the exposed area of patch being covered when the tab is in the folded position, the tab secured in the folded position by bonding to the exposed area of the patch. 15. A peelable lid structure for a container, the peelable lid structure including: a barrier layer for preventing the passage of fluids; and a tab extending from a centre panel of the peelable lid structure for removing the peelable lid structure from the container to allow access to the container contents; in which the barrier layer extends from the centre panel into the tab and includes less than 20 microns thickness of aluminum; and in which the tab is folded over the centre panel and secured in the folded position on the centre panel for processing of can contents or handling operations; wherein the tab or centre panel includes a patch, an area of which is exposed by a hole in the tab or centre panel respectively, and the tab is secured in the folded position by bonding to the exposed area of the patch. 16. The peelable lid structure as defined in claim 15, wherein the aluminum layer is not more than 15 microns in thickness. 17. The peelable lid structure as defined in claim 15, wherein the peelable lid structure includes one or more of the following layers: polyethylene terephthalate (PET), aluminum, nylon or polypropylene. 18. The peelable lid structure as defined in claim 15, wherein the tab is secured in the folded position by an adhesive or by heat sealing.