Dual-layered bag with fines separator

Abstract

A bag or package which can separate and retain fines or particles filtered from the contents of the bag or package is disclosed. The bag or package may be dual-layered. The inner layer, or second layer, may include one or more grates, holes, mesh portions, openings, perforations, or slits disposed in one or more surfaces of the second layer. The openings can filter fines or particles from the contents of the second layer into a gap or pocket formed between a portion of the inner layer and the outer layer, or first layer. Alternatively, the bag or package may be single layered and include a septum in its interior. The septum can have one or more openings that filter fines or particles from the contents of the bag into a gap or pocket.

1 . A dual-layered bag, comprising:
 a first layer comprising a first wall, and a second wall, wherein the first wall and the second wall cooperate to define at least a portion of a first cavity;   a second layer comprising a first wall, and a second wall, wherein the first wall and the second wall cooperate to define at least a portion of a second cavity, wherein the second layer is disposed within the first cavity, wherein the second layer is coupled to the first layer, and wherein a bottom portion of the second layer comprises a plurality of openings.   
     
     
         2 . The dual-layered bag of  claim 1 , further comprising:
 a pocket positioned between an outside surface of the bottom portion of the second layer and an inside surface of a bottom portion of the first layer.   
     
     
         3 . The dual-layered bag of  claim 2 , wherein the pocket is configured to capture fines that pass from the second cavity through the plurality of openings. 
     
     
         4 . The dual-layered bag of  claim 1 , wherein the openings comprise one-way perforations. 
     
     
         5 . The dual-layered bag of  claim 4 , wherein the one-way perforations are substantially V-shaped. 
     
     
         6 . The dual-layered bag of  claim 4 , wherein the one-way perforations are substantially semicircular. 
     
     
         7 . The dual-layered bag of  claim 1 , wherein the openings comprise slits. 
     
     
         8 . The dual-layered bag of  claim 1 , wherein the bottom portion of the second layer comprises a mesh portion. 
     
     
         9 . A dual-layered bag, comprising:
 a first layer and a second layer, wherein both the first layer and the second layer comprise:
 a first wall comprising a first end, a first lateral end, and a second lateral end, wherein the first end is coupled to a first end of a third wall; 
 a second wall comprising a first end, a first lateral end, and a second lateral end, wherein the first end is coupled to a second end of the third wall; 
 a first gusset extending from the first lateral end of the first wall to the first lateral end of the second wall; and 
 a second gusset extending from the second lateral end of the first wall to the second lateral end of the second wall, wherein the first wall, the second wall, the first gusset, the second gusset, and the third wall cooperate to define at least a portion of a cavity in the interior of both the first layer and the second layer; 
 wherein the third wall of the second layer comprises a plurality of openings, wherein the second layer is coupled to the first layer, and wherein the second layer is disposed within the cavity of the first layer. 
   
     
     
         10 . The dual-layered bag of  claim 9 , wherein at least a portion of dimensions of the second layer are smaller than at least a portion of dimensions of the first layer. 
     
     
         11 . The dual-layered bag of  claim 9 , further comprising:
 a pocket between an outside surface of the third wall of the second layer and an inside surface of the third wall of the first layer.   
     
     
         12 . The dual-layered bag of  claim 11 , wherein the pocket is configured to capture fines that pass through the plurality of openings in the third wall of the second layer from the cavity of the second layer. 
     
     
         13 . The dual-layered bag of  claim 9 , wherein the openings comprise one-way perforations. 
     
     
         14 . The dual-layered bag of  claim 13 , wherein the one-way perforations comprise distal portions, wherein the distal portions are configured to extend below the plane of the third wall of the second layer forming the openings in the third wall of the second layer. 
     
     
         15 - 16 . (canceled) 
     
     
         17 . A dual-layered package, comprising:
 a first package; and   a second package disposed within the first package, wherein the second package is configured to filter particles of less than a predetermined size from contents of the second package, and wherein the first package is configured to capture the filtered particles.   
     
     
         18 . The dual-layered package of  claim 17 , wherein upon pouring of at least a portion of the filtered contents from the second package, the first package is configured to retain the filtered particles. 
     
     
         19 . The dual-layered package of  claim 18 , wherein both the first package and the second package are substantially flexible. 
     
     
         20 . The dual-layered package of  claim 18 , wherein both the first package and the second package are substantially rigid. 
     
     
         21 . The dual-layered package of  claim 18 , wherein the first package is substantially flexible and the second package is substantially rigid. 
     
     
         22 . The dual-layered package of  claim 18 , wherein the first package is substantially rigid and the second package is substantially flexible.