Patent ID: 6175997
Filing Date: 2001-01-23
Classification: A47C,B68G,Y10T

Abstract:
A method of assembling a plurality of pocketed coil strings into an inner spring core wherein each string comprises a plurality of side-by-side pockets containing coil springs of a finite height, each pocket being formed from a nonwoven material, said method comprising:providing first and second continuous webs of nonwoven fabric material having a mesh netting with a heat activated adhesive on one surface;feeding each of said webs into contact with a respective heating member to activate said adhesive;spacing said heating members apart by a distance less than the height of said springs;feeding said webs against the respective heating member with the netting facing away from the respective heating member and with the netting on said first web facing the netting on said second web; andfeeding a pocketed coil string into the space between said heating members to engage opposite ends of said pockets with a respective web to bond a web to each of the pockets of said string and bond said webs to said pockets.