Stackable container comprising an arched base having a wide area of contact

Abstract

Stackable container ( 1 ) having a body ( 2 ) and a bottom ( 3 ) comprising: an annular seat ( 10 ) defining a seating plane ( 11 ) complementary with a peripheral face ( 8 ) provided on a shoulder ( 4 ); a conical arch ( 14 ) that extends from the seat ( 10 ). In this container: an outer transverse extension Dext of the seat and an overall transverse extension D of the body are such that: Dext D ≥ 0.8 the arch ( 14 ) has a peripheral section ( 17 ) complementary with a frustoconical surface ( 7 ) of the shoulder ( 4 ), the seating plane ( 11 ) and the peripheral support section ( 17 ) define a contact surface, the projection of which on the seating plane ( 11 ) has a surface area S C such that: Sc S ≥ 0.4 where S is the surface area delimited by an outer perimeter ( 12 ) of the seat ( 10 ).

1 . Stackable container of plastic material comprising a body extending along a principal axis and having an overall transverse extension D, a shoulder on an upper side of the extension of the body, a neck in the extension of the shoulder, and a bottom on a lower side of the extension of the body, the shoulder comprising, beneath the neck, a frustoconical surface, and at its junction with the body, a peripheral face defining a support plane substantially perpendicular to the principal axis, the bottom comprising:
 an annular seat defining a seating plane complementary to the peripheral support face and having an outer transverse extension Dext;   a conical arch that extends from the seat towards a central zone;   
       characterized in that: 
       the outer transverse extension Dext of the seat and the overall transverse extension D of the body are such that: 
       
         
           
             
               
                 Dext 
                 D 
               
               ≥ 
               0.8 
             
           
         
       
       the arch has a peripheral support section that is complementary to the frustoconical surface, which extends between the seat and a central disc suitable for receiving the neck of an underlying container, 
       the seating plane and the peripheral support section of the arch define a contact surface, the projection of which on the seating plane has a surface area S C  such that: 
       
         
           
             
               
                 Sc 
                 S 
               
               ≥ 
               0.4 
             
           
         
       
       where S is the surface area delimited by an outer perimeter of the seat. 
     
     
         2 . Container according to  claim 1 , characterized in that the shoulder comprises an axial step separating the peripheral support face from the frustoconical surface, and the bottom comprises an axial internal annular cheek that is complementary to the step. 
     
     
         3 . Container according to  claim 2 , characterized in that a height H of the cheek and a width L of the seating plane are such that: 
       
         
           
             
               0.5 
               ≤ 
               
                 L 
                 H 
               
               ≤ 
               2 
             
           
         
       
     
     
         4 . Container according to  claim 1 , characterized in that the ratio between an inner transverse extension Dint and an outer transverse extension Dext of the seat is such that: 
       
         
           
             
               0.7 
               ≤ 
               
                 Dint 
                 Dext 
               
               ≤ 
               0.95 
             
           
         
       
     
     
         5 . Container according to  claim 1 , characterized in that the frustoconical surface has a horizontal angle (A) of between 5° and 40°. 
     
     
         6 . Container according to  claim 1 , characterized in that the L/H ratio is about 0.65. 
     
     
         7 . Container according to  claim 1 , characterized in that the Sc/S ratio is about 0.55. 
     
     
         8 . Container according to  claim 1 , characterized in that the frustoconical surface is provided with stiffeners. 
     
     
         9 . Container according to  claim 1 , characterized in that the bottom is fitted with a central disc provided with stiffeners. 
     
     
         10 . Container according to  claim 1 , characterized in that the disc has an inside diameter Dp, the ratio of which, to the overall transverse dimension D of the body, is greater than or equal to 0.4.