Patent GB-1243911-A (GB)
Title: Improvements in and relating to cargo containers
IPC: B65D6/16
Filed: 1969-03-05
Abstract: 1,243,911. Cargo containers. GENTEX CORP. 5 March, 1969 [21 March, 1968], No. 11650/69. Heading B8P. [Also in Division E2] A cargo container comprises a generally rectangular base 12, a pair of generally rectangular side panels 14, a pair of generally rectangular end panels 16, and a generally rectangular top panel 18, each side and end panel and base including first disengageable inter-engaging elements 50, 52, 98, 100, 28, 30, 34, 36 respectively forming parts of the bottom edge portions of each of said side and end panels and forming parts of the peripheral portions of said base for connecting said side and end panels to said base, each side and end panel comprising second disengageable inter-engaging elements 72, 74, 120, 122 respectively forming parts of the side edge portions of said side panels and forming parts of the side edge portions of said end panels for connecting said side panels to said end panels and each side, end and top panel including means 62, 64, 106, 108, 152, 154, 170, 172 for connecting said top panel to said side panels and said end panels, said second elements respectively comprising inwardly directed tongues 72 forming parts of said side edge portions of said side panels and outwardly directed tongues 120 forming parts of said side edge portions of said end panels, respective side panel tongues being adapted to engage with respective end panel tongues in response to movement of said end panel tongues in a direction perpendicular to the length of the side panel tongues. In a first construction the base 12 includes a body 20 formed of plywood, the upper and under surfaces of the central portion of which have abrasion resistant skins 22 and 24 made for example of glass fibre cloth impregnated with an epoxy resin or of a laminated paper impregnated with resin, the side edge portions of the base consists of aluminium extrusions 26 shaped so as to provide said elements which as shown are an inwardly extending tongue 28 and a groove 30. The end edge portions of the base consists of aluminium extrusions 32 each providing said elements which are also an inwardly extending tongue 34 and a corresponding groove 36 and at each of the corners of the base is an aluminium corner member 38, these are attached to the extrusions 26 and 32 by welding, the arrangement providing a continuous tongue extending all round the base and a continuous groove; the extrusions and corner members also provide a channel 37 extending round the entire base which receives a sealing gasket 39. The side panels 14 each include a body 40 made of a rigid low density polyurethane or polystyrene foam material with abrasion resistant skins 42 and 44 on each side made of glass fibre fabric impregnated with an epoxy or phenolic resin. The edge portions of the side panels are formed by aluminium extrusions and each provides said elements 50, 52, 62, 64, 72, 74 which are also a tongue and a groove similar to those of the base, the tongues along the top and bottom edges extending outwardly with the grooves extending inwardly and the tongues along the end edges extending inwardly with the grooves extending outwardly, the end panels are constructed similarly to the side panels except that the tongues 98, 120, 106 around the edges all extend outwardly with the grooves 100, 122, 108 extending inwardly and the top is also similarly constructed to the side panels except that the tongues 152, 170 all extend inwardly with the grooves 154, 172 extending outwardly, the arrangement is such that the tongues of the base and top extend into the grooves along the top and bottom edges of the side and end panels with the tongues of the side and end panels along the top and bottom edges extending into the grooves of the top panel and base; the tongues and grooves along the end edges of the side and end panels also interengage; gaskets similar to the gasket 39 are provided around the edges of each of the side and end panels and the top to seal the joints. The end panels are held in place by turnbutton fasteners 176 which engage suitable keepers on the side panels. Inside the box, when it is assembled, a net is suspended from the top by means cf tension releasable hooks. Tie down straps extend from the net into engagement with D rings connected to the base; access to the free end portions of the straps is obtained through openings 198 in the side panels which are closed by doors 200 and when cargo is disposed in the container the net is pulled down on to the cargo by pulling on the free end portions of the straps through the openings the straps being retained in their tensioned condition by buckles 188. A modification is described in which instead of the base being provided with tongues and the bottom edges of the side and end panels also having tongues as described above the panels (or the base) are provided with generally arcuate tongues 228 as shown in Fig. 11 with the base (or panels) provided with grooves 234 for receiving the tongues; a modified end panel is also described which has a top edge provided with a pivoted hook as shown in Fig. 10 which engages a groove in the top panel. In a further modification the top edge of each of the end and side panels is provided with a hook similar to that shown in Fig. 10.