Container assembly and cover and container thereof

Abstract

A cover of a container assembly includes a cover portion and a connecting portion connected to a periphery of the cover portion and integrally formed as one piece with the same from pulp,. The container assembly further includes a container having a mouth portion surrounding an axis. The cover is detachably connected to the mouth portion, and cooperates with the container to define a receiving space. The connecting portion includes an outer sidewall surrounding and pressing against the mouth portion and having opposite outer and inner surfaces, a groove recessed from the outer surface and surrounding the axis, and a protruding rib protruding from the inner surface and opposite to the groove. The groove and the protruding rib are simultaneously formed by extrusion after the outer sidewall is formed. The protruding rib is configured to block the mouth portion.

What is claimed is: 
     
         1 . A cover of a container assembly, the container assembly further including a container having a mouth portion surrounding an axis, said cover being configured to be detachably connected to the mouth portion of the container and being configured to cooperate with the container to define a receiving space, said cover comprising:
 a cover portion; and   a connecting portion connected to a periphery of said cover portion and integrally formed as one piece with said cover portion from pulp, said connecting portion including an outer sidewall that is configured to surround and press against the mouth portion and that has an outer surface, an inner surface opposite to said outer surface, a groove recessed from said outer surface and surrounding the axis, and a protruding rib protruding from said inner surface and opposite said groove, said groove and said protruding rib being simultaneously formed by extrusion after said outer sidewall is formed, said protruding rib being configured to block the mouth portion.   
     
     
         2 . The cover as claimed in  claim 1 , wherein said protruding rib protrudes from said inner surface in a width direction transverse to the axis. 
     
     
         3 . The cover as claimed in  claim 1 , wherein a ratio of a depth of said groove along a width direction transverse to the axis and a thickness of said protruding rib protruding from said inner surface ranges from 1:0.2 to 1:1. 
     
     
         4 . The cover as claimed in  claim 3 , wherein each of said depth of said groove and said thickness of said protruding rib ranges from 0.2 mm to 1.2 mm. 
     
     
         5 . The cover as claimed in  claim 1 , wherein said connecting portion further includes an inner sidewall surrounded by and radially spaced apart from said outer sidewall, and an abutment end wall connected between said inner sidewall and said outer sidewall and having a position difference with said cover portion along the axis said inner sidewall and said outer sidewall being configured to press against two opposite sides of the mouth portion, and wherein said abutment end wall said inner sidewall and said outer sidewall cooperatively define an accommodating space for receiving the mouth portion, said accommodating space having an opening opposite to said abutment end wall, a thickness of said protruding rib protruding from said inner surface being 4% to 50% of a width of said accommodating space along a width direction transverse to the axis. 
     
     
         6 . The cover as claimed as claimed in  claim 5 , wherein said width of said accommodating space is greater than a width of said abutment end wall along the width direction. 
     
     
         7 . A container assembly comprising:
 a plurality of containers, each of which includes a mouth portion surrounding an axis; and   a plurality of said covers as claimed in  claim 1 , each of said covers being detachably connected to said mouth portion of a respective one of said containers and cooperating with said respective one of said containers to define a receiving space;   wherein said connecting portion of each of said covers further includes an inner sidewall surrounded by and radially spaced apart from said outer sidewall, and an abutment end wall connected between said inner sidewall and said outer sidewall and having a position difference with said cover portion along the axis, said inner sidewall and said outer sidewall of each of said covers being configured to press against two opposite sides of said mouth portion of said respective one of said containers, and wherein said abutment end wall said inner sidewall and said outer sidewall of each of said covers cooperatively define an accommodating space for receiving said mouth portion of said respective one of said containers, said accommodating space having an opening opposite to said abutment end wall, a thickness of said protruding rib protruding from said inner surface being 4% to 50% of a width of said accommodating space along a width direction transverse to the axis;   wherein said covers are stackable along the axis; and wherein, when said covers are stacked, said abutment end wall of one of said covers abuts against said protruding rib of an adjacent one of said covers, and said cover portion, said abutment end wall and said inner sidewall of each of said covers are respectively spaced apart from said cover portion, said abutment end wall and said inner sidewall of said adjacent one of said covers.   
     
     
         8 . A container assembly, comprising:
 a container including a mouth portion surrounding an axis; and   said cover as claimed in  claim 1 , said cover being detachably connected to said mouth portion of said container, and cooperating with said container to define a receiving space.   
     
     
         9 . The container assembly as claimed in  claim 8 , wherein:
 said container further includes a bottom wall, and a surrounding wall extending upwardly from a periphery of said bottom wall along the axis and connected to said mouth portion;   said mouth portion includes an inner annular wall connected to an end of said surrounding wall that is opposite to said bottom wall, an outer annular wall radially spaced apart from said inner annular wall, and a top end wall interconnecting said inner annular wall and said outer annular wall and having a position difference with said bottom wall of said container along the axis;   said top end wall, said inner annular wall and said outer annular wall of said mouth portion cooperatively define an annular space having an opening opposite to said top end wall;   said outer sidewall of said cover surrounds and presses said outer annular wall of said mouth portion, said inner sidewall of said cover presses against said inner annular wall of said mouth portion, and said abutment end wall of said cover presses against said top end wall of said mouth portion.