Bag-lined spring core with monolithic perimeter, and reinforced and stabilized edges

Abstract

A core of springs with monolithic perimeter frame and reinforced and stabilized edges, of the type used for the manufacture of seats for furniture or mattresses, which is comprised of: an arrangement of springs that can be manufactured from independent bag-lined cylindrical springs; and a layer of support material or bottom on which the arrangement of springs is arranged, the dimensions in length and width of said layer of support material being greater than those of the arrangement of springs, thereby generating a surplus of material around the arrangement of springs that supports, which is characterized in that; a monolithic perimeter frame of foamed material made in situ on the surplus material of the support layer, surrounds and reinforces the arrangement of springs, so that said perimeter frame is firmly joined as part of the chemical reaction of its foaming and adhesion process.

What is claimed is: 
     
         1 . A core of springs with monolithic perimeter frame and reinforced and stabilized edges, of the type used for the manufacture of seats for furniture or mattresses, comprising: an arrangement of independent bag-lined cylindrical springs; and a layer of support material or bottom on which the arrangement of springs is arranged, being the dimensions in length and width of said layer of support material greater than those of the arrangement of springs, thereby generating a surplus of material around the arrangement of springs that supports, which is characterized in that;
 a monolithic perimeter frame of foamed material made in situ on the surplus material of the support layer, surrounds and reinforces the arrangement of springs, so that said perimeter frame is firmly joined as part of the chemical reaction of its foaming and adhesion process both to the support material and to each of the bags containing the peripheral springs of the core, wherein said perimeter frame also penetrates each of the empty spaces defined between each of the bags containing the peripheral springs of the arrangement of springs.   
     
     
         2 . The core of springs with monolithic perimeter frame and reinforced and stabilized edges, as claimed in  claim 1 , characterized in that; the monolithic perimeter frame surrounds each of the bags containing the peripheral springs in at least a portion close to 50% of its circumference. 
     
     
         3 . The core of springs with monolithic perimeter frame and reinforced and stabilized edges, as claimed in  claim 1 , characterized in that; the monolithic perimeter frame surrounds each of the bags that contain the corner springs of the arrangement of springs in at least a portion close to 75% of its circumference. 
     
     
         4 . The core of springs with monolithic perimeter frame and reinforced and stabilized edges, as claimed in  claim 1 , characterized in that; the foaming material with which the monolithic perimeter frame is built in situ results, but is not limited to, a mixture for flexible polyurethane foam.