Method and apparatus for providing improved pocketed innerspring constructions

摘要

An innerspring construction comprises a first elongate string of pocketed coil springs with each coil having a longitudinal axis lying in a first plane and a first elongate tube of fabric having first transverse seams spaced along the length of the tube to define individual coil spring pockets. The tube is alternately bent proximate the first seams such that every other first seam lies on the same side of the first plane. A second elongate string of pocketed coils in which each coil has a longitudinal axis lying in a second plane has a second elongate tube of fabric with second transverse seams spaced along the length of the tube to define individual coil pockets. The second elongate string is attached to the first elongate string by bonds formed between circumferentially abutting surfaces on the coil pockets of the first and second tubes of fabric. The resulting construction provides for reduced tendency for leaning coils and permits greater innerspring firmness for a given coil wire diameter.