mattress coil
   HOME

TheInfoList



OR:

Mattress coils, also known as mattress springs, are
coil spring A selection of conical coil springs The most common type of spring is the coil spring, which is made out of a long piece of metal that is wound around itself. Coil springs were in use in Roman times, evidence of this can be found in bronze Fib ...
s used in a mattress. Coils are primarily used in the core (support layer) of
innerspring mattress A mattress is a large, usually rectangular pad for supporting a lying person. It is designed to be used as a bed, or on a bed frame as part of a bed. Mattresses may consist of a quilted or similarly fastened case, usually of heavy cloth, contain ...
es, which is their original use. In recent years, small "micro-coils" are being used in the
upholstery Upholstery is the work of providing furniture, especially seats, with padding, springs, webbing, and fabric or leather covers. The word also refers to the materials used to upholster something. ''Upholstery'' comes from the Middle English w ...
(comfort layer) of mattresses, primarily with a coil core ("coil-on-coil" construction), but sometimes with other core types. Mattress coils were introduced in the mid-late 19th century, and remain popular in the 21st century, particularly in the United States.


Types

There are four types of mattress coils. A key desideratum is "response range", meaning the change in firmness as the spring is compressed – initially soft, to conform to the body, then hard, to provide support. In increasing order of response range and cost, the types are: * Continuous coils (the Leggett & Platt brand name is "Mira-coil") is an innerspring configuration in which the rows of coils are formed from a single piece of wire. They work in a hinging effect similar to that of offset coils. * Bonnell coils are the oldest and most common. First adapted from buggy seat springs of the 19th century, they are still prevalent in mid-priced mattresses. Bonnell springs are a knotted, round-top, hourglass-shaped steel wire coil. When laced together with cross wire helicals, these coils form the simplest innerspring unit, also referred to as a Bonnell unit. Steel coils make innerspring mattress construction responsive, but they also don’t offer a whole lot of pressure relief like memory foam does. * Offset coils are an hourglass type coil on which portions of the top and bottom convolutions have been flattened. In assembling the innerspring unit, these flat segments of wire are hinged together with helical wires. The hinging effect of the unit is designed to conform to body shape. LFK (Left Facing Knot) coils are an offset coil with a cylindrical or columnar shape. *
Marshall coil Marshall coils, also known as encased coils or encased springs (most commonly known in North America as pocketed springs), are component parts of a mattress in which each coil is separately wrapped in a textile material. History Marshall coils w ...
s, also known as wrapped or encased coils or pocket springs, are thin-gauge, barrel-shaped, knotless coils individually encased in fabric pockets—normally a fabric from man-made, non-woven fiber. Some manufacturers pre-compress these coils, which makes the mattress firmer and allows for motion separation between the sides of the bed. As the springs are not wired together, they work more or less independently: the weight on one spring does not affect its neighbors. This allows them to react to pressure independently instead of all together, which minimizes movement and allows for a more buoyant feel.


History

While coil springs were invented in the 15th century, they were not used in mattresses until the mid-late 19th century, following the use of
upholstery coil springs Upholstery coil springs are an important part of most modern upholstery. The consumer usually never sees the construction features of an upholstered piece. The overall quality of the materials and construction dictate the comfort level of an uphol ...
in furniture and carriages. Microcoils were introduced in the early 21st century, and are a small part of the market. The bed coil spring was patented by Louis Andrew Vargha. Some modern feedback on coils within mattresses cast aspersions on some of its attributes such as abrasion on coils eventually culminating into prodding, and the audibility of the coils, as it may decrease privacy for intimate moments such as sexual activity.Rizzo, Terrie Heinrich. "Sleep matters: learn smart strategies to make sure your body gets the zzzzzs it needs." IDEA Fitness Journal 4.5 (2007): 102-104.


Manufacturers

The mattress coil market is quite concentrated – the leading suppliers are Leggett & Platt (founded 1883) of
Carthage, Missouri Carthage is a city in Jasper County, Missouri, United States. The population was 15,522 as of the 2020 census. It is the county seat of Jasper County and is nicknamed "America's Maple Leaf City." History Jasper County was formed in 1841. ...
and AGRO International (founded 1948) of
Bad Essen Bad Essen is a small municipality and health resort in the district of Osnabrück, in Lower Saxony. Bad Essen with its historical centre is located on the German Timber-Frame Road. Geography The town of Bad Essen is on the North German Plains ...
,
Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...
. Others include HSM (company) (formally Hickory Springs, founded 1944) of
Hickory, North Carolina Hickory is a city located primarily in Catawba County, with formal boundaries extending into Burke and Caldwell counties. The city lies in the U.S. state of North Carolina. At the time of the 2020 census, Hickory's population was 43,490. Hickor ...
; Spinks (founded 1840) of
Leeds Leeds () is a city and the administrative centre of the City of Leeds district in West Yorkshire, England. It is built around the River Aire and is in the eastern foothills of the Pennines. It is also the third-largest settlement (by popula ...
,
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the European mainland, continental mainland. It comprises England, Scotlan ...
and Subiñas (founded 1959) of Mungia,
Biscay Biscay (; eu, Bizkaia ; es, Vizcaya ) is a province of Spain and a historical territory of the Basque Country, heir of the ancient Lordship of Biscay, lying on the south shore of the eponymous bay. The capital and largest city is Bilbao. B ...
province,
Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = ''Plus ultra'' (Latin)(English: "Further Beyond") , national_anthem = (English: "Royal March") , i ...
.


See also

*
Upholstery coil springs Upholstery coil springs are an important part of most modern upholstery. The consumer usually never sees the construction features of an upholstered piece. The overall quality of the materials and construction dictate the comfort level of an uphol ...
*
Box-spring Queen size box-spring on metal bed frame 8-way hand-tied box spring A box-spring (or divan in some countries) is a type of bed base typically consisting of a sturdy wooden frame covered in cloth and containing springs. Usually the box-spri ...


References

{{Mattresses Mattresses Springs (mechanical)