Mattress innerspring structure having coaxial coil units

A - Human Necessities – 47 – C

Patent

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Details

A47C 23/043 (2006.01) A47C 23/30 (2006.01) A47C 27/07 (2006.01) B21F 27/16 (2006.01) B21F 35/04 (2006.01)

Patent

CA 2215019

An innerspring structure (10, 40) comprises a plurality of outer coils (12, 45) generally parallel with each other to form top and bottom face surfaces (24, 26, 52, 53). One or more of the outer coils (12, 45) has an inner coil (14, 55) of similar shape positioned coaxially with the respective outer coil (12, 45). In one embodiment, helical lacing wire (30, 61) wraps adjacent end turns of the coaxially aligned coils together to form reinforced coil units (16, 54). Helical lacing wire (30) connects the coils (16) of the structure together and connects the end turns of peripheral coils to a border wire (28). In another embodiment of the invention, the structure comprises a row of inner coils (55) and a row of outer coils (45), each formed from a single continuous piece of wire such that adjacent coils of the row are interconnected by interconnection segments (47). The rows of coils are positioned together so that the inner coils (55) are coaxial with the outer coils (45) to form reinforced coil unit (54).

Une structure de ressorts intérieurs (10, 40) comprend une pluralité de spirales extérieures (12, 45) parallèles les unes aux autres, destinées à former des surfaces supérieures et inférieures (24, 26, 52, 53). Une ou plusieurs des spirales extérieures (12, 45) présentent une spirale intérieure (14, 55) de forme similaire positionée coaxialement par rapport à la spirale extérieure respective (12, 45). Dans un mode de réalisation, un fil de laçage hélicoïdal (30, 61) entoure des spires terminales adjacentes des spirales alignées coaxialement ensemble, pour former des unités de spirales renforcées (16, 54). Un fil de laçage hélicoïdal (30) relie ensemble les spirales (16) de la structure et relie les spires terminales de spirales périphériques à un fil de bordure (28). Dans un autre mode de réalisation de l'invention, la structure comprend une rangée de spirales intérieures (55) ainsi qu'une rangée de spirales extérieures (45), chacune formée d'une seule pièce de fil continu de sorte que les spirales adjacentes de la rangée soient interconnectées par des segments d'interconnexion (47). Les rangées de spirales sont positionnées ensemble de sorte que les spirales intérieures (55) soient coaxiales par rapport aux spirales extérieures (45) pour former une unité de spirale renforcée (54).

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