bagged spring mattress; device for making a spring mattress; method for making a pocket drawstring; and method for making a bagged spring mattress

摘要

bagged spring mattress overview; device for making a spring mattress; method for making a pocket drawstring; and method for making a bagged spring mattress is a bagged spring mattress (10) comprising coil springs (2) arranged as spring units enclosed in a pocket material (4) that forms pockets (3), wherein the spring units are successively arranged in elongate cords, wherein the mattress comprises a plurality of such side-by-side interconnected cords, wherein the elongate cords have a plurality of transverse seams (5) arranged parallel to the longitudinal direction of the springs. (2) to separate the pockets (3), wherein a middle portion (8) of the transverse seams (5) fixes at least one layer of cover material (4) on either side of the spring unit to each other. at least some of the transverse seams (5) are backwardly folded transverse seams (7), in which the cover material (4) near an end portion of the backwardly folded transverse seams (7) is folded back toward the middle portion (8) of the transverse seams (5). thus, each of the rearwardly folded transverse seams (7) has at least one end portion that secures at least twice as much covering material (4) as in a corresponding transverse seam (5) that is not backwardly bent. . This provides a flat and smooth upper surface of the mattress, which avoids, for example, problems with bulging false slopes.