A coffin or container that can be erected or assembled from a substantially knock down or flat state, which includes:—a primary tension panel;—a pair of side panels; and—a pair of end panels; wherein, in an assembled form, an end of each said side panel is releasably attached to each end panel via c
A coffin or container that can be erected or assembled from a substantially knock down or flat state, which includes:—a primary tension panel;—a pair of side panels; and—a pair of end panels; wherein, in an assembled form, an end of each said side panel is releasably attached to each end panel via complementary engaging features on each side panel to define a substantially quadrilateral wall, such that said primary tension panel, when located substantially within said wall, places at least said side panels in tension to thereby retain said primary tension panel within said wall and define, at least in part, a cavity.
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1. A coffin or container that is erected or assembled from a substantially knock down or flat state, which includes:— a primary tension panel;a pair of side panels; anda pair of end panels;wherein, in an assembled form, an end of each said side panel is releasably attached to each end panel via comp
1. A coffin or container that is erected or assembled from a substantially knock down or flat state, which includes:— a primary tension panel;a pair of side panels; anda pair of end panels;wherein, in an assembled form, an end of each said side panel is releasably attached to each end panel via complementary engaging features on each side panel to define a substantially quadrilateral wall, such that said primary tension panel, when located substantially within said wall, places at least said side panels in tension to thereby retain said primary tension panel within said wall and define, at least in part, a cavity; such that the amount of tension applied by the primary tension panel is determined by the following formula: % tension=((W−w)/L)×100%whereW=a width of the tension panel at a widest part of the tension panel;w=a distance between a pair of straight lines at the same location as W, where each straight line joins lengthwise adjacent vertices of the tension panel;L=a length of the tension panel; and% tension=1% to 18%. 2. The coffin or container as claimed in claim 1 wherein, the primary tension panel includes two primary tension panel sides configured to apply the tension to the side panels. 3. The coffin or container as claimed in claim 2 wherein, said primary tension panel sides are convex curves. 4. The coffin or container as claimed in claim 1 wherein, said primary tension panel is located close to, and is approximately aligned with, a primary tension edge of each side panel, where the primary tension edge of each side panel is located on a first face of the coffin or container. 5. The coffin or container as claimed in claim 1 wherein, the coffin or box includes a unitary secondary tension panel or a split secondary tension panel. 6. The coffin or container as claimed in claim 5 wherein, said secondary tension panel, when located substantially within said wall, places at least said side panels in tension to thereby retain said secondary tension panel within said wall and act as a full or partial lid, cover or door for the cavity. 7. The coffin or container as claimed in claim 5 wherein, the secondary tension panel includes two secondary tension panel sides configured to apply the tension to the side panels. 8. The coffin or container as claimed in claim 7 wherein, said secondary tension panel sides are convex curves. 9. The coffin or container as claimed in claim 5 wherein, the widest point of the unitary secondary tension panel is located at or between 25% and 75% of the length of the tension panel. 10. The coffin or container as claimed in claim 5 wherein, the amount of tension applied by the unitary secondary tension panel is determined by the following formula: % tension=((W−w)/L)×100%whereW=a width of the tension panel at a widest part of the tension panel;w=a distance between a pair of straight lines at the same location as W, where each straight line joins lengthwise adjacent vertices of the tension panel;L=a length of the tension panel;% tension=1% to 18%. 11. The coffin or container as claimed in claim 1 wherein, a widest point of the primary tension panel is located at or between 25% and 75% of the length of the tension panel. 12. The coffin or container as claimed in claim 1 wherein, each side panel includes a primary tension panel support for the primary tension panel. 13. The coffin or container as claimed in claim 12 wherein, the tension panel support is a groove or channel cut into an inner surface of the side panel. 14. The coffin or container as claimed in claim 13 wherein, the depth of the groove is less than 50% of the thickness of the side panel. 15. A method of making a container or coffin which includes the following steps: construct an essentially quadrilateral wall from a pair of end panels and a pair of side panels;insert a first primary tension side of a primary tension panel into a matching primary tension panel support in a first side panel;push a second primary tension panel side of the primary tension panel into a matching primary tension panel support in a second side panel deforming each side panel and applying tension to at least the side panels;wherein the amount of tension applied by the primary tension panel is determined by the following formula: % tension=((W−w)/L)×100%whereW=a width of the tension panel at a widest part of the tension panel;w=a distance between a pair of straight lines at the same location as W, where each straight line joins lengthwise adjacent vertices of the tension panel;L=a length of the tension panel; and% tension=1% to 18%. 16. The method as claimed in claim 15 wherein, the method it further includes the following steps: insert a first secondary tension side of a first secondary tension panel into a matching secondary tension panel support in the first side panel;insert a second secondary side of the first secondary tension panel into a matching secondary tension panel support in the second side panel and move the first secondary tension panel until it is in contact with an edge of an end panel. 17. The method as claimed in claim 16 wherein, the method it further includes the following steps: rest a second secondary tension panel against a support shelf on the first secondary tension panel and insert a first secondary tension side of the second secondary tension panel into a matching secondary tension panel support in the first side panel;insert a second secondary side of the second secondary tension panel into a matching secondary tension panel support in the second side panel and move the second secondary tension panel until it is in contact with the first secondary tension panel.
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