Container

Abstract

A stackable container includes a surrounding wall that has a plurality of recessed parts and a top open end formed with a flange. The recessed parts are indented respectively from inner surfaces of corners of the surrounding wall and protrude outwardly and respectively from outer surfaces of the corners. The recessed parts have respective outer shoulder surface to abut against the annular flange of another similar container to prevent tight contact between the container and the another similar container.

What is claimed is: 
     
         1 . A container stackable on another similar container, the container comprising:
 a base wall;   a surrounding wall extending upwardly from said base wall, said base wall and said surrounding wall cooperatively defining a receiving space;   an annular flange extending around and projecting outwardly from a top open end of said surrounding wall distal from said base wall; and   a plurality of recessed parts indented from an inner surface of said surrounding wall in proximity to said annular flange, and protruding outwardly from an outer surface of said surrounding wall,   wherein, when the container is stacked on another similar container, said recessed parts of the container are able to abut against said annular flange of another similar container to prevent tight contact between the container and the another similar container.   
     
     
         2 . The container as claimed in  claim 1 , wherein said annular flange has an inclined surface portion directly connected to said surrounding wall and inclined downward and toward said receiving space. 
     
     
         3 . The container as claimed in  claim 2 , wherein each of said recessed parts has a rounded outer shoulder surface protruding from said outer surface of said surrounding wall. 
     
     
         4 . The container as claimed in  claim 3 , wherein said annular flange further has a non-inclined portion extending outwardly from said inclined surface portion in a direction substantially parallel to said base wall, each of said recessed parts further having an upstanding wall portion that extends downwardly from said annular flange and that is perpendicular to said base wall, and a transverse wall portion that extends inwardly from a bottom end of said upstanding wall toward said receiving space and that is parallel to said base wall, said rounded outer shoulder surface being formed at an outer surface of said transverse wall portion. 
     
     
         5 . The container as claimed in  claim 1 , further comprising a plurality of reinforcement ribs extending upwardly from said base wall to said top open end of said surrounding wall. 
     
     
         6 . The container as claimed in  claim 1 , wherein said surrounding wall is inclined outwardly from said base wall to said annular flange. 
     
     
         7 . A stack of containers, comprising:
 a plurality of container bodies stacked one above the other, each of said container bodies including:   a base wall;   a surrounding wall that extends upwardly and is inclined outwardly from said base wall and that has a plurality of corners, said base wall and said surrounding wall cooperatively defining a receiving space;   an annular flange extending around and projecting outwardly from a top open end of said surrounding wall distal from said base wall; and   a plurality of recessed parts indented respectively from inner surfaces of said corners in proximity to said annular flange and protruding outwardly and respectively from outer surfaces of said corners;   wherein said recessed parts of each of said container bodies are seated on said annular flange of a lower one of said container bodies to prevent each of said container bodies from contacting tightly the lower one of said container bodies.   
     
     
         8 . The stack of containers as claimed in  claim 7 , wherein each of said recessed parts has an upstanding wall portion that extends downwardly from said annular flange and that is perpendicular to said base wall, and a transverse wall portion that extends inwardly from a bottom end of said upstanding wall toward said receiving space, said transverse wall portion being formed with a rounded outer shoulder surface protruding from said outer surface of said surrounding wall, said rounded outer shoulder surface of each of said container bodies being seated on said annular flange of the lower one of said container bodies. 
     
     
         9 . The stack of containers as claimed in  claim 8 , wherein said annular flange of each of said container bodies has an inclined surface portion directly connected to said surrounding wall and inclined downward and toward said receiving space to abut against said rounded outer shoulder surface of each of said recessed parts of an upper one of said container bodies. 
     
     
         10 . The stack of containers as claimed in  claim 9 , wherein each of said container bodies includes a plurality of reinforcement ribs extending upwardly from said base wall to said top open end of said surrounding wall.