Patent ID: 6029957
Filing Date: 2000-02-29
Classification: A47C,B68G

Abstract:
A method of producing a pocket spring assembly, comprising the steps of securing together webs of fabric along multiple parallel seam zones so as to form a quilt defining a plurality of parallel fabric tubes extending longitudinally of a plane of the quilt, adjacent tubes so formed having regularly spaced connections between them at spaced intervals longitudinally of the tubes, supporting the formed tubes on guides extending longitudinally through the tubes, repeatedly drawing portions of the tubes formed by the quilt from the guides at their one end, pinching layers of fabric in upper and lower portions of the tubes in the drawn off portion to form folds extending oppositely out of the plane of the quilt at locations intermediate the connections between the tubes, securing the folds by connections to form pockets in the drawn off portions of the quilt, and passing precompressed coil springs through the guides and releasing them into the pockets between each drawing of the quilt, with their axes perpendicular to both the plane of the quilt and the direction of advancement of the quilt, so that secured folds in the fabric of the tubes in front of and behind the released springs retain a two dimensional array of pockets with the axes of the springs perpendicular to the plane of the quilt.