Panel for a container, a container provided with such container and a method for making same
A panel for a container includes an outer edge to be connected to the container and a tab connected to the panel. The tab has a rear tab part for gripping by a user and a front tab part for engagement with the panel and forming an opening in the panel. The panel is provided with deformation means which structurally deform upon a transition of the panel into a convex shape and which locked in the deformed state urge the panel to a substantially flat or concave shape.
1. A panel for a container, comprising an outer edge for connection to the container and a tab connected to the panel, wherein the tab has a rear tab part for gripping by a user and a front tab part for engagement with the panel and forming an opening in the panel, wherein the panel is provided with deformation means, which structurally and substantially plastically deform upon a transition of the panel into a convex shape due to a pressure difference over the panel and which, locked in the deformed plastic state, urge the panel to a substantially flat or concave shape, wherein the deformation means are located between a central panel portion of the panel and the outer edge of the panel such that the deformation means are located at least one of a) laterally of the tab; b) diametrically opposed to the tab relative to the central panel portion; and c) annularly around the central portion of the panel with an interruption created by the tab, and wherein, upon the convex transition of the panel, a finger access is formed beneath a free end of the tab and the finger access is maintained when the panel is urged by the deformation means to the substantially flat or concave shape.
2. The panel according to claim 1 , wherein the deformation means are located in at least a flexible region of the panel.
3. The panel according to claim 2 , wherein the deformation means are located in a substantially circumferential flexible region of the panel.
4. The panel according to claim 1 , wherein the deformation means have the form of at least one of the following: a broader terrace step, a radially inwardly inclined terrace, a radially inwardly declined terrace and/or a radially inwardly wavy terrace.
5. The panel according to claim 1 , wherein the transition from the convex shape into the flat or concave shape occurs at pressure difference over the panel in the range of about −0.3 bar to +0.3 bar.
6. The panel according to claim 1 , wherein the tab rear part rests on a support formed in the panel.
7. A container provided with a panel according to claim 1 .
8. The container according to claim 7 , wherein the panel has a concave shape and the deformation means are locked in the deformed state.
9. The panel according to claim 1 , wherein the transition from the convex shape into the flat or concave shape occurs at pressure difference over the panel in the range of about −0.2 bar to +0.2 bar.
10. The panel according to claim 1 , wherein the transition from the convex shape into the flat or concave shape occurs at pressure difference over the panel in the range of about −0.1 bar to +0.1 bar.
11. The panel according to claim 2 , wherein the deformation means have the form of at least one of the following: a broader terrace step, a radially inwardly inclined terrace, a radially inwardly declined terrace and/or a radially inwardly wavy terrace.