Bedding or seating product made with coil springs having...

Details Bedding or seating product made with coil springs having... Bedding or seating product made with coil springs having...

A - Human Necessities

47

C

A47C 23/04 (2006.01)

Patent

CA 2608527

Disclosed herein is a bedding or seating product (10) having a spring core (12) comprising coil springs (26) having unknotted end turns (72, 74) made from high tensile strength wire. In each embodiment, the end turns (72, 74) of the coil springs (26) are generally U-shaped having one leg (76) longer than the other (78), the legs (76, 78) being joined by an arcuate connector (80). The springs (26) are oriented in the spring core (12) such that a long leg (76) of one end turn (72) abuts a short leg (78) of the adjacent end turn (72) prior to be wrapped in helical lacing wire (32). The high tensile wire enables the coil springs (26) to be manufactured using less wire than heretofore possible.

L'invention concerne un produit de literie ou de siège (10) muni d'un carcasse de ressorts (12) constitué de ressorts à boudin (26) munis de spires d'extrémité non nouées (72, 74) formée par un fil à résistance à la traction élevée. Dans chaque mode de réalisation, les spires d'extrémité (72, 74) des ressorts à boudin (26) sont sensiblement en forme de U et présentent un pied (76) plus long qu'un autre pied (78), les pieds (76, 78) étant reliés par un raccord arqué (80). Les ressorts (26) sont orientés dans la carcasse de ressorts (12) de façon qu'un long pied (76) de la spire d'extrémité (72) bute contre un pied court (78) de la spire d'extrémité adjacente (72) avant d'être enveloppée dans un fil de liaison hélicoïdal (32). Le fil à haute résistance permet de fabriquer les ressorts à boudin (26) en utilisant moins de fil qu'auparavant.

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