Housing for explosive device and method of assembly

Abstract

Described herein is an explosive casing, cartridge or housing, as well as a method of making same, for a small explosive or firecracker such that when fully assembled results in a tetrahedron or pyramidal, 3-D structure that provides an enhanced explosive sound and bursting strength.

1 . An explosive device housing comprising:
 a housing or casing formed from a substrate layer, wherein the substrate layer includes at least one layer of paper-based material, the substrate layer forming a tubular structure, the tubular structure having a first flap member formed at a first open end and a second flap member formed at a second open end with a tube body disposed in between the first and second open ends, the tube body being collinear with a longitudinal axis of the tubular structure and wherein each of the flap members are configured to be radially oriented about 90 degrees with respect to each other, each flap member having an inside surface, an outside surface and a distal end portion away from the tube body;   a first seal forming a base for the housing, the first seal formed from a folded over first flap member that covers the first open end such that the inside surface of the flap member is in contact with and adhered to the tube body, wherein the outside surface is exposed and the distal end portion of the first flap member is substantially perpendicular to the longitudinal axis of the tubular structure; and   a second seal forming a top for the housing, the second seal formed from a folded over second flap member that covers the second open end such that the inside surface and distal end portion of the second flap member is in contact with and adhered to the tube body, thereby forming a top for the casing or housing.   
     
     
         2 . The explosive device of  claim 1 , wherein the substrate layer is further comprised of a fiber reinforcement sheet disposed on the paper-based material. 
     
     
         3 . The explosive device of  claim 2 , wherein substrate layer is further comprised of multiple layers of alternating paper-based material and fiber reinforcement sheets. 
     
     
         4 . An explosive device comprising the housing or casing of  claim 1  and a combustible or explosive compound disposed within the housing, wherein the explosive device provides an increase in burst strength as energy and gases from igniting the combustible material attempt to escape one of the first and second seals formed from the folded over flap member structure. 
     
     
         5 . An explosive device comprising the housing or casing of  claim 3  and a combustible or explosive compound disposed within the housing, wherein the explosive device provides an increase in burst strength as energy and gases from igniting the combustible material attempt to escape one of the first and second seals from the multiple layer substrate. 
     
     
         6 . The explosive device of  claim 2 , wherein substrate layer is further comprised of multiple layers of alternating paper-based material and fiber reinforcement sheets, and wherein a range of multiple layers is from about 3 to about 8 layers. 
     
     
         7 . The explosive device of  claim 4 , wherein the housing includes a wick or fuse member have a proximal end extending internally and in contact with the explosive compound and a distal end extend out of and away from the housing. 
     
     
         8 . An explosive device housing comprising:
 a housing formed from a substrate layer, wherein the substrate layer includes at least one layer of paper-based material, the substrate layer forming a tubular structure, the tubular structure having a first flap member formed at a first open end and a second flap member formed at a second open end with a tube body disposed in between the first and second open ends, the tube body being collinear with a longitudinal axis of the tubular structure and wherein each of the flap members are configured to be radially oriented about 180 degrees with respect to each other, each flap member having an inside surface, an outside surface and a distal end portion away from the tube body;   a first seal forming a base for the housing, the first seal formed from a folded over first flap member that covers the first open end such that the inside surface of the flap member is in contact with and adhered to the tube body, wherein the outside surface is exposed and the distal end portion of the first flap member is substantially perpendicular to the longitudinal axis of the tubular structure; and   a second seal forming a top for the housing, the second seal formed from a folded over second flap member that covers the second open end such that the inside surface and distal end portion of the second flap member is in contact with and adhered to the tube body, thereby forming a top for the casing or housing, wherein the housing has a tubular shape.   
     
     
         9 . The explosive device of  claim 8 , wherein substrate layer is further comprised of multiple layers of alternating paper-based material and fiber reinforcement sheets. 
     
     
         10 . An explosive device comprising the housing or casing of  claim 9  and a combustible or explosive compound disposed within the housing, wherein the explosive device provides an increase in burst strength as energy and gases from igniting the combustible material attempt to escape one of the first and second seals from the multiple layer substrate. 
     
     
         11 . A method of forming a robust casing or housing adapted to receive and contain therein an explosive or combustible material, the method comprising the steps of:
 forming a substrate from a sheet of paper-based material and a sheet of fiber reinforcement material disposed on the paper-based material sheet;   forming a tube from the substrate having a first open end and a second open end and a tube body therebetween, the tube body being collinear with a longitudinal axis of the tube;   removing material from the first and second end of the tube so as to form a first flap member at the first end and a second flap member at the second end of the tube, each of the flap members configured to be radially oriented about 90 degrees with respect to each other, each flap member having an inside surface, an outside surface and a distal end away from the tube body;   folding over the first flap member to cover the first open end such that the inside surface of the flap member is in contact with and adhered to the tube body, wherein the outside surface is exposed and the distal end of the flap member is substantially perpendicular to the longitudinal axis of the tube, thereby forming a base for the casing; and   folding over a second flap member to cover the second open end such that the inside surface and distal end of the second flap member is in contact with and adhered to the tube body, thereby forming a top or cover for the housing or casing.   
     
     
         12 . The method of forming an explosive device from a housing of  claim 11  further comprising the step of disposing an explosive or combustible material within the housing before folding over the second flap member. 
     
     
         13 . The method of forming an explosive device from a housing of  claim 11  further including the step of disposing the explosive or combustible material by injecting the material into the housing as the fuse is inserted into the housing. 
     
     
         14 . The method of forming an explosive device of  claim 12  further including the step of inserting into the housing a wick or fuse member with a proximal end extending internally and in contact with the explosive compound and a distal end extend out of and away from the housing. 
     
     
         15 . The explosive device housing of  claim 8  wherein the tubular body is configured to be reduced in longitudinal length to facilitate forming an elliptical or spherical shape.