Adhesive bonding of strings of pocketed coil springs

A method for manufacturing a spring core comprising the steps of:

• providing a first string of pocketed springs, the springs having longitudinal axes which are substantially parallel to each other;
• moving the first string past an adhesive applicator and in a direction generally perpendicular to the longitudinal axes of the springs;
• spraying an adhesive from the adhesive applicator onto a side surface of the moving pocketed springs;
• moving the adhesive applicator so that the adhesive being sprayed therefrom forms a pattern on the side surfaces of the pocketed springs;
• the spraying including spraying the adhesive in a plurality of parallel lines from a plurality of nozzles on the adhesive applicator;
• moving the first string relative to a similar second string of pocketed springs so that the sprayed side surface of the second string contacts the first string and thereby adhesively bonds the first and second strings together;
• and
• repeating the steps until the spring core of a desired size is manufactured.