| 摘要 |
PCT No. PCT/CA94/00055 Sec. 371 Date Sep. 18, 1995 Sec. 102(e) Date Sep. 18, 1995 PCT Filed Feb. 1, 1994 PCT Pub. No. WO94/18116 PCT Pub. Date Aug. 18, 1994In the production of a pocket spring assembly, two layers of fabric are secured together along multiple parallel seam zones so as to form a quilt defining a plurality of parallel fabric tubes, the tubes so formed are supported on guides extending longitudinally through the tubes, portions of the quilt are repeatedly drawn from the guides at their one ends and folds formed in each layer of fabric in the drawn off portion are secured to form pockets from the drawn off portions of the quilt, and precompressed coil springs are passed through the guides and released into the pockets between each drawing of the quilt, with their axes perpendicular to both the axes of the fabric tubes 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 them in the pockets. Spaced longitudinal slits are formed in the seam zones, the slits permitting the fabric to envelope the tubes.
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