Stackable container with secure sealing

Abstract

The present invention relates to a stackable container for items, such as food, comprising a base and lid with secure sealing mechanisms. Each of the base and lid comprises corresponding three rims and three edges being mateable to provide multiple layers of sealing mechanisms to ensure durable sealing. The lid further comprises a sealing lip for locking the lid onto the base and for providing another layer of sealing. Each of the base and lid further comprises partially planar raised portions and further raised portion around the outer perimeter of the planar raised portions for providing stable stacking mechanism. The lid further comprises a tab for assisting a user to open the lid without spoilage.

1 . A stackable container, comprising:
 (i) a base, comprising
 a generally planar bottom portion; 
 a shape reinforcing structure comprising a curved portion curved upwardly from the perimeter of said bottom portion and a shape reinforcing rim extending outwardly from the upper end of said curved portion; 
 a base sidewall extended upwardly from the outer end of said reinforcing rim of said shape reinforcing structure; 
 a first base rim region extended horizontally and outwardly from the upper end of said base sidewall; 
 a first base sealing edge extended upwardly from the outer end of said first base rim region; 
 a second base rim region extended horizontally and outwardly from the upper end of said first base sealing edge; 
 a second base sealing edge extended upwardly from the outer end of said second base rim region; 
 a third base rim region extended horizontally and outwardly from the upper end of said second base sealing edge; 
 a third base sealing edge extended upwardly from the outer end of said third base rim region; and 
   (ii) a lid, comprising:
 a generally planar lid top portion; 
 a lid sidewall extended downwardly from the perimeter of said lid top portion; 
 a first lid rim region extended horizontally and outwardly from the bottom end of said lid sidewall; 
 a first lid sealing edge extended upwardly from the outer end of said first lid rim region; 
 a second lid rim region extended horizontally and outwardly from the upper end of said first lid sealing edge; 
 a second lid sealing edge extended upwardly from the outer end of said second lid rim region; 
 a third lid rim region extended horizontally and outwardly from the upper end of said second lid sealing edge; 
 a third lid sealing edge extended downwardly from the outer end of said third lid rim region; 
 a sealing lip extended inwardly from the inner bottom end of said third lid sealing edge; and 
 a tab at one section of the perimeter of said third lid sealing edge for providing a means for detaching said lid from said base; 
   wherein said first base rim and said first lid rim, said first base sealing edge and said first lid sealing edge, said second base rim and said second lid rim, said second base sealing edge and said second lid sealing edge, said third base rim and said third lid rim, said third base sealing edge and said third lid sealing edge correspond and are mateable to one another for providing sealing mechanisms while said lid is attached to said base; and   wherein said reinforcing structure reinforces the shapes of said base side wall and said base bottom.   
     
     
         2 . The container as recited in  claim 1 , wherein said planar bottom portion further comprises a partially planar raised central base portion and a raised base portion along the perimeter of said partially planar raised central base portion wherein said planar bottom portion including said partially planar raised central base portion and a raised portion along the perimeter of said partially planar raised central portion, and wherein said planar lid top portion further comprises a partially planar raised central lid portion, a raised lid portion along the perimeter of said partially planar raised central lid portion, and a raised wall portion along the perimeter of said lid top portion, wherein said planar raised central base portion with said raised base portion and said partially planar raised central lid portion with raised lid portion correspond and are mateable, and the outer end of said base bottom portion and raised wall portion correspond and are mateable and to provide an air gap therebetween for avoiding said base being stick to the top of said lid while providing stable and durable stacking structure. 
     
     
         3 . The container as recited in  claim 2 , wherein said central lid portion further comprises a void at the center thereof for providing air gap for avoiding said base being stick to the top of said lid. 
     
     
         4 . The container as recited in  claim 1 , wherein the bottom edge of said third base sealing edge and said sealing lip of said lid defines a sealing. 
     
     
         5 . The container as recited in  claim 2 , wherein at least one of said raised base portion and said raised lid portion is continuously raised. 
     
     
         6 . The container as recited in  claim 2 , wherein said raised base portion and said raised lid portion form keying structure for providing alignment for stacking said containers.