Patent ID: 6887343

Claim:
A spiral winding system for winding first and second sheets of filter media into a spiral-wound roll, said first sheet having a plurality of flutes defined by wall segments extending in zig-zag manner between flute tips at axially extending bend lines, the flute tips on one side of said first sheet being in contiguous relation with said second sheet to define axial flow channels, comprising first and second spaced belts having a gap therebetween defining a winding zone receiving said first and second sheets of filter media, one of said sheets facing and engaging said first belt, the other of said sheets facing said second belt, wherein said sheets roll-wind in said winding zone such that said one sheet is engaged by said second belt to roll-wind said sheet into a spiral-wound roll, wherein said first belt is trained around a first set of rollers, said first set of rollers is mounted on a first carriage having one or more guide rails extending therefrom, said second belt is trained around a second set of rollers, said second set of rollers is mounted on a second carriage mounted on and moveable along said one or more guide rails toward and away from said gap.