spring inserter 120 where the compressed springs are inserted proximate the open edge of the folded fabric between the top and bottom plies after the compressed springs are inserted into the fabric the fabric can traverse towards a first welder 130 that welds the top and bottom plies of the folded fabric together along the open edge after the open edge of the folded fabric is welded that portion of the fabric can traverse towards a second welder 135 that welds the top and bottom plies together along a line from the open edge to the folded edge transverse to the longitudinal axis of the fabric between each of the compressed spring coils in some embodiments the second welder 135 is configured to weld two lines simultaneously on each side of the compressed spring the first and second welder 130 135 can join the top and bottom plies of the fabric together an accordance with many different methods known in the art including but not limited to hot weld fusing the top and bottom plies together sewing the top and bottom plies together applying an adhesive to join the top and bottom plies together and the like additionally the weld lines created by the first and second welders can be both linear and non linear in accordance with various embodiments of the present invention for.