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 arithmetic difference between the yield stress and the ultimate tensile stress of the sheet metal is between 21 MPa or 3.05 ksi and 23.1 MPa or 3.35 ksi, 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 21.4 MPa or 3.1 ksi and 22.75 MPa or 3.3 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 22 MPa or 3.2 ksi. 
     
     
         4 . The elongated bottle of  claim 1 , wherein the yield stress of the sheet metal is between 196.5 MPa or 28.5 ksi and 217.2 MPa or 31.5 ksi. 
     
     
         5 . The elongated bottle of  claim 4 , wherein the yield stress of the sheet metal is 205.5 MPa or 29.8 ksi. 
     
     
         6 . The elongated bottle of  claim 1 , wherein the yield stress of the sheet metal is between 213.7 MPa or 31 ksi and 268.9 MPa or 39 ksi. 
     
     
         7 . The elongated bottle of  claim 1 , wherein the cylindrical portion has a length between 114 mm or 4.490″ and 162 mm or 6.381″. 
     
     
         8 . The elongated bottle of  claim 7 , wherein the cylindrical portion has a length of 162 mm. 
     
     
         9 . The elongated bottle of  claim 1 , wherein the bottle has a total length between 190 mm and 238 mm. 
     
     
         10 . The elongated bottle of  claim 1 , wherein the bottle has a total length of 238 mm. 
     
     
         11 . The elongated bottle of  claim 1 , wherein the neck portion comprises a threaded portion. 
     
     
         12 . The elongated bottle of  claim 11 , wherein the threaded portion further comprises a folded flange. 
     
     
         13 . The elongated bottle of  claim 11 , further comprises a threaded cap that is couplable with the threaded portion. 
     
     
         14 . A method for manufacturing an elongated bottle, the method comprising:
 providing sheet metal, the arithmetic difference between the yield stress and the ultimate tensile stress of the sheet metal is between 21 MPa or 3.05 ksi and 23.1 MPa or 3.35 ksi;   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.   
     
     
         15 . The method of  claim 14 , wherein the bottle has a total length between 190 mm and 238 mm. 
     
     
         16 . The method of  claim 14 , wherein the bottle has a total length of 238 mm. 
     
     
         17 . The method of  claim 14 , wherein an arithmetic difference between the yield stress and the ultimate tensile stress of the sheet metal is 3.2 ksi. 
     
     
         18 . 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 22.4 MPa and wherein the yield stress is 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;   folding an edge of the open end outwardly to form a flange; and   wherein the bottle has a total length of about 238 mm.   
     
     
         19 . The method of  claim 18 , further comprising forming a shoulder portion at an angle of about 45 degrees to a body portion of the cylindrical container. 
     
     
         20 . A device comprising:
 an aluminum container having a dome, wherein the dome comprises an aluminum sheet comprising an AA 3XXX or a 5xxx and having a tensile yield strength as measured in the longitudinal direction of 27-33 ksi and an ultimate tensile strength;   wherein the ultimate tensile strength minus the tensile yield strength is less than 3.30 ksi (UTS-TYS<3.30 ksi).   
     
     
         21 . The device of  claim 20  wherein the tensile yield strength as measured in the longitudinal direction is 28-32 ksi. 
     
     
         22 . The device of  claim 20  wherein the tensile yield strength as measured in the longitudinal direction is 28.53-31.14 ksi. 
     
     
         23 . The device of  claim 20  wherein the ultimate tensile strength minus the tensile yield strength is 2.90-3.30 ksi. 
     
     
         24 . The device of  claim 20  wherein the ultimate tensile strength minus the tensile yield strength is 2.99-3.30 ksi. 
     
     
         25 . The device of  claim 20  wherein the aluminum sheet comprises one of AA: 3×03, 3×04 or 3×05. 
     
     
         26 . The device of  claim 20  wherein the aluminum sheet comprises AA 3104. 
     
     
         27 . The device of  claim 20  wherein the aluminum container is a bottle. 
     
     
         28 . A method comprising:
 forming a container from an aluminum sheet comprising a 3XXX or a 5xxx alloy having a tensile yield strength as measured in the longitudinal direction of 27-33 ksi and an ultimate tensile strength, wherein the ultimate tensile strength minus the tensile yield strength is less than 3.30 ksi (UTS-TYS<3.30 ksi); and   reducing a diameter of a portion of the container by at least 26%.   
     
     
         29 . The method of  claim 28  wherein reducing a diameter of the container by at least 26% comprises necking the container with necking dies. 
     
     
         30 . The method of  claim 29  reducing the diameter of the container by at least 26% comprises necking the container at least 14 times. 
     
     
         31 . The method of  claim 28  wherein the diameter of the container is reduced by at least 30%. 
     
     
         32 . The method of  claim 28  wherein the tensile yield strength as measured in the longitudinal direction is 28-32 ksi. 
     
     
         33 . The method of  claim 28  wherein the tensile yield strength as measured in the longitudinal direction is 28.53-31.14 ksi. 
     
     
         34 . The method of  claim 28  wherein the ultimate tensile strength minus the tensile yield strength is 2.90-3.30 ksi. 
     
     
         35 . The method of  claim 28  wherein the ultimate tensile strength minus the tensile yield strength is 2.99-3.30 ksi. 
     
     
         36 . The method of  claim 28  wherein the aluminum sheet comprises one of AA: 3×03, 3×04 or 3×05. 
     
     
         37 . The method of  claim 28  wherein the aluminum sheet comprises AA 3104. 
     
     
         38 . The method of  claim 28  wherein the container is a bottle. 
     
     
         39 . The method of  claim 28  further comprising expanding a section of the portion of the container having a reduced diameter. 
     
     
         40 . The method of  claim 39  wherein the section has a length and the length is at least 0.3 inches. 
     
     
         41 . The method of  claim 40  wherein the length is at least 0.4 inches.