Plastic bottle with a mouth

Abstract

To provide a plastic bottle whose weight can be reduced without sacrificing strength of a bottle mouth, the plastic bottle is provided with a bottle mouth having a circumferential wall, including a threaded section formed on an outer circumferential surface of the circumferential wall, a support ring protruding from the outer circumferential surface below the threaded section, and punched sections formed on the circumferential wall.

1 . A plastic bottle, comprising:
 a bottle mouth having a circumferential wall, including:
 a threaded section formed on an outer circumferential surface of the circumferential wall; 
 a support ring protruding from the outer circumferential surface below the threaded section; and 
 punched sections formed on the circumferential wall. 
   
     
     
         2 . The plastic bottle of  claim 1 , wherein the punched sections are positioned away from threads of the threaded section and from the support ring. 
     
     
         3 . The plastic bottle of  claim 2 , wherein the punched sections are positioned between the threaded section and the support ring. 
     
     
         4 . The plastic bottle of  claim 3 , wherein the bottle mouth is sealed by a cap fitted with a releasable tamper evident band, and wherein the outer circumferential surface is provided with a bead ring protruding at a position away from the punched sections between the threaded section and the support ring, the tamper evident band being configured to be severed and dropped onto the support ring when the bottle mouth is opened by manipulating the cap and to remain on the bottle mouth by the bead ring and the support ring. 
     
     
         5 . The plastic bottle of  claim 4 , wherein the bottle mouth is provided with a maximum diameter section having the largest diameter at the outer circumferential surface below a base side of the bead ring, the maximum diameter section being configured to be covered by the tamper evident band when the bottle mouth is sealed by the cap, and wherein the punched sections are formed on the outer circumferential surface from a lower edge of the maximum diameter section to an upper edge of the support ring. 
     
     
         6 . The plastic bottle of  claim 5 , wherein columnar sections having the same maximum diameter as the diameter of the maximum diameter section are formed between the maximum diameter section and the support ring adjacent to the punched sections and the maximum diameter section, wherein a difference between the maximum diameter in the maximum diameter section and the minimum diameter in the punched sections is not more than 3.0 mm. 
     
     
         7 . The plastic bottle of  claim 5 , wherein the punched sections are formed in line symmetry at uniform intervals in the circumferential direction, and the columnar sections having the same maximum diameter as the diameter of the maximum diameter section are formed adjacent to the maximum diameter section between two adjacent ones of the punched sections. 
     
     
         8 . The plastic bottle of  claim 4 , wherein sections connecting each of the punched sections and the columnar sections are etched with an arc having a center of a radius of curvature located inside of the bottle mouth. 
     
     
         9 . The plastic bottle of  claim 3 , wherein each of the punched sections has an arced cross-sectional shape. 
     
     
         10 . The plastic bottle of  claim 3 , wherein the threaded section includes at least one continuous thread strip around the outer circumferential surface of the circumferential wall. 
     
     
         11 . The plastic bottle of  claim 10 , wherein the bottle mouth has a wall thickness at the threaded section thinner than a wall thickness at a section below the threaded section. 
     
     
         12 . The plastic bottle of  claim 1 , wherein the plastic bottle is formed by a biaxial stretching blow molding.