Low spread metal elongated bottle and production method

Abstract

A low-spread metal elongated bottle and its production method are described for reducing rejection rates associated with the production of metal bottles at high speeds. The elongated bottle includes a sheet metal formed body. The sheet metal has a low spread between a yield state corresponding to the yield stress of the sheet metal and an ultimate tensile state corresponding to the ultimate tensile stress of the sheet metal. The body further includes a concave bottom portion having a circular perimeter. A cylindrical portion extends from the circular perimeter of the bottom portion and has a uniform diameter. A neck portion extends from the cylindrical portion and has a tapered profile. The neck portion may include a threaded portion including threads exposed on the outer surface of the neck portion or an area for crimping of a crown.

What is claimed is: 
     
         1 . An elongated bottle, comprising:
 a body formed of sheet metal, wherein the sheet metal has a low spread between a yield state corresponding to the yield stress of the sheet metal and an ultimate tensile state corresponding to the ultimate tensile stress of the sheet metal, the body further comprising:
 a concave bottom portion having a circular perimeter; 
 a cylindrical portion extending from the circular perimeter of the bottom portion, the cylindrical portion having a uniform diameter; 
 a neck portion having a varying diameter reduced from the uniform diameter of the cylindrical portion, the varying diameter forming a tapered profile; and 
 an opening. 
   
     
     
         2 . The elongated bottle of  claim 1 , wherein the arithmetic difference between the yield stress and the ultimate tensile stress of the sheet metal is between about 21 MPa or 3.05 ksi and about 23.1 MPa or 3.35 ksi. 
     
     
         3 . The elongated bottle of  claim 1 , wherein the arithmetic difference between the yield stress and the ultimate tensile stress of the sheet metal is between about 21.4 MPa or 3.1 ksi and about 22.75 MPa or 3.3 ksi. 
     
     
         4 . The elongated bottle of  claim 1 , wherein the arithmetic difference between the yield stress and the ultimate tensile stress of the sheet metal is about 22 MPa or 3.2 ksi. 
     
     
         5 . The elongated bottle of  claim 1 , wherein the yield stress of the sheet metal is between about 196.5 MPa or 28.5 ksi and about 217.2 MPa or 31.5 ksi. 
     
     
         6 . The elongated bottle of  claim 1 , wherein the yield stress of the sheet metal is between about 213.7 MPa or 31 ksi and about 268.9 MPa or 39 ksi. 
     
     
         7 . The elongated bottle of  claim 3 , wherein the yield stress of the sheet metal is about 205.5 MPa or 29.8 ksi. 
     
     
         8 . The elongated bottle of  claim 1 , wherein the cylindrical portion has a length between about 114 mm or 4.490″ and about 162 mm or 6.381″. 
     
     
         9 . The elongated bottle of  claim 8 , wherein the cylindrical portion has a length of about 162 mm. 
     
     
         10 . The elongated bottle of  claim 1 , wherein the bottle has a total length between about 190 mm and about 238 mm. 
     
     
         11 . The elongated bottle of  claim 1 , wherein the bottle has a total length of about 238 mm. 
     
     
         12 . The elongated bottle of  claim 1 , wherein the neck portion comprises a threaded portion. 
     
     
         13 . The elongated bottle of  claim 12 , wherein the threaded portion further comprises a folded flange. 
     
     
         14 . The elongated bottle of  claim 12 , further comprises a threaded cap that is couplable with the threaded portion. 
     
     
         15 . A method for manufacturing an elongated bottle, the method comprising:
 providing sheet metal having a low spread between a yield state corresponding to the yield stress of the sheet metal and an ultimate tensile state corresponding to the ultimate tensile stress of the sheet metal;   forming the sheet metal into a circular cup;   drawing and ironing the circular cup into a cylindrical container having an open end and a closed end;   forming the closed end of the cylindrical container into a concave bottom portion;   cutting the open end of the cylindrical container; and   forming the open end of the cylindrical container into a neck portion.   
     
     
         16 . The method of  claim 15 , wherein the bottle has a total length between about 190 mm and about 238 mm. 
     
     
         17 . The method of  claim 15 , wherein the bottle has a total length of about 238 mm. 
     
     
         18 . The method of  claim 15 , wherein an arithmetic difference between the yield stress and the ultimate tensile stress of the sheet metal is about 3.2 ksi. 
     
     
         19 . A method for manufacturing a beverage bottle, the method comprising:
 forming sheet metal into a circular cup, the sheet metal having a low spread between a yield stress of the sheet metal and an ultimate tensile stress of the sheet metal, wherein an arithmetic difference between the yield stress and the ultimate tensile stress of the sheet metal is about 22.4 MPa and wherein the yield stress is about 200 MPa;   drawing and ironing the circular cup into a cylindrical container having an open end and a closed end;   forming the closed end of the cylindrical container into a concave bottom portion;   cutting the open end of the cylindrical container;   narrowing the open end of the cylindrical container into a neck portion; and   folding an edge of the open end outwardly to form a flange;   wherein the bottle has a total length of about 238 mm.   
     
     
         20 . The method of  claim 19 , further comprising forming a shoulder portion at an angle of about 45 degrees to a body portion of the container.