Tamper evident packing case

Abstract

A self-erecting packing case formed from a single board blank, the packing case comprising: first and second side walls and first and second end walls integrally connected together along respective parallel fold lines; a first-type base panel integrally connected to a bottom end of each of the first and second side walls along a respective fold line; and, a second-type base panel integrally connected to a bottom end of each of the first and second end walls along a respective fold line; wherein each first-type base panel is glued to an adjacent second-type base panel and comprises a fold line along an edge of where the first-type base panel is glued to the adjacent second-type base panel; and wherein each first-type base panel further comprises a lobed section integrally connected along a fold line, wherein the lobed sections of each first-type base panel are arranged to deflect and then interlock with each other when the packing case is erected from a collapsed condition, thereby to form the base of the packing case.

1 . A self-erecting packing case formed from a single board blank, the packing case comprising:
 first and second side walls and first and second end walls integrally connected together along respective parallel fold lines;   a first-type base panel integrally connected to a bottom end of each of the first and second side walls along a respective fold line; and,   a second-type base panel integrally connected to a bottom end of each of the first and second end walls along a respective fold line;   wherein each first-type base panel is glued to an adjacent second-type base panel and comprises a fold line along an edge of where the first-type base panel is glued to the adjacent second-type base panel;   and wherein each first-type base panel further comprises a lobed section integrally connected along a fold line, wherein the lobed sections of each first-type base panel are arranged to deflect and then interlock with each other when the packing case is erected from a collapsed condition, thereby to form the base of the packing case.   
     
     
         2 . The packing case of  claim 1 , wherein each lobed section deflects by bending along the fold line connecting the lobed section and the first-type base panel. 
     
     
         3 . The packing case of  claim 1 , wherein each second-type base panel is shaped such that it at least partially engages with an interlock between the lobed sections of the first-type base panels. 
     
     
         4 . The packing case of  claim 3 , wherein the second-type base panel is shaped to leave sufficient space around the interlock to allow the lobed sections to lie flat or substantially flat. 
     
     
         5 . The packing case of  claim 1 , wherein a bottom edge of each second-type base panel is cut substantially in line with a bottom edge of each first-type base panel. 
     
     
         6 . The packing case of  claim 1 , wherein a first side edge of each second-type base panel is cut with an angle of between 0 and 43 degrees. 
     
     
         7 . The packing case of  claim 6 , wherein the first side edge of each second-type base panel is cut with an angle of 5 degrees. 
     
     
         8 . The packing case of  claim 1 , wherein a second side edge of each second-type base panel is cut with an angle of between 15 and 40 degrees. 
     
     
         9 . The packing case of  claim 8 , wherein the second side edge of each second-type base panel is cut with an angle of between 25 and 35 degrees. 
     
     
         10 . The packing case of  claim 8 , wherein the second side edge of each second-type base panel is curved. 
     
     
         11 . The packing case of  claim 1 , wherein one side wall is provided with an extension flap integrally connected along a fold line, wherein the extension flap is glued to an inner surface of an edge of an adjacent end wall. 
     
     
         12 . The packing case of  claim 1 , wherein one end wall is provided with an extension flap integrally connected along a fold line, wherein the extension flap is glued to an inner surface of an edge of an adjacent side wall. 
     
     
         13 . The packing case of  claim 1 , further comprising an integral lid connected along a fold line to one of the side walls. 
     
     
         14 . The packing case of  claim 13 , wherein each end wall further comprises a top inner panel integrally connected along a respective fold line at a top edge, wherein the top inner panel is also integrally connected to the integral lid along a respective fold line and wherein the top inner panel further comprises a fold line that, when erected, forms a flap that collapses into the packing case when the integral lid is closed. 
     
     
         15 . The packing case of  claim 13 , further comprising an outer panel integrally connected to the integral lid along a fold line, wherein the outer panel comprises an adhesive strip on an inner surface arranged to adhere to an outer surface of an opposing side wall. 
     
     
         16 . The packing case of  claim 15 , wherein the outer flap further comprises a perforated or zipper rule or an easy-open tape attached during manufacture. 
     
     
         17 . The packing case of  claim 1 , further comprising a top flap integrally connected along a fold line to a top edge of one of the side walls or end walls. 
     
     
         18 . The packing case of  claim 14 , further comprising a top flap integrally connected along a fold line to a top edge of one of the side walls or end walls, wherein the top flap is connected to an adjacent top inner flap by a frangible slit. 
     
     
         19 . The packing case of  claim 1 , wherein the board is formed of a material selected from a group comprising fibreboard, Correx, carton board, pasted solid board, boxboard, rigid plastic and semi-rigid plastic.