Packing box

Abstract

A packing box is provided. One paperboard is folded to form the packing box. Four sides and the top cover of the folded packing box can include two paperboard layers. The bottom of the folded packing box can include four paperboard layers. Advantages of the packing box include reinforced strength and a bottom that will not fail upon packing, storage, and transport of heavy bulk materials.

1 . A packing box comprising parent paperboard, side paperboards, and back cover paperboards, wherein said parent paperboard, side paperboards, and back cover paperboards constitute the box, characterized by the following facts: the packing box is formed by folding one paperboard; side paperboard, air hole and plug are perpendicular to back cover paperboard and are set inside side paperboard; plug is connected to narrow slot, and plug is connected to narrow slot; back cover paperboards are perpendicular to side paperboard and parent paperboard and are set inside back cover paperboard; side paperboard is perpendicular to back cover paperboard and is set inside side paperboard; plug is connected to narrow slots; side paper board is perpendicular to back cover paperboard and is set inside parent paperboard; back cover paperboard is perpendicular to side paperboard and is set inside back cover paperboard; plug is connected to narrow slot.  
   
   
       2 . The packing box of  claim 1 , wherein narrow slots are formed on the side edges of said parent paperboard, side paperboards, back cover paperboards, and air hole, respectively.  
   
   
       3 . The packing box of  claim 1 , wherein plugs are formed on the side edges of said side paperboard, back cover paperboards, respectively.