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[caption id="attachment_807" align="aligncenter" width="950"] Stearns & Foster's Intellicoil[/caption] Coil-in-Coil Technology [caption id="attachment_806" align="aligncenter" width="123"] Serta's Duet Coil[/caption] Pocket coils were invented at the end of the 19th Century (1800's) by James Marshall, who began manufacturing them about 1900. Since then, individually wrapped pocket coils have been adopted by most of the major manufacturers of innerspring...
Pocket (Marshall) Coils Pocket coils, also known as pocketed coils, encased coils, wrapped coils or Marshall coils, are light gauge open-end coils in fabric pockets. They were invented in 1900 by James Marshall, an Englishman who migrated to Canada. In Toronto, Ontario, Canada he founded the Marshall Mattress Company to make mattresses using his technology. The company is still in business, focusing solely on pocket coil mattresses. It was featured in a 2011 BedTimes Magazine...
Continuous Coils [caption id="attachment_719" align="aligncenter" width="347"] Looking down rows of continuous coils Image from Bedrooms & More, Seattle, Washington[/caption] Continuous coils are the least expensive type of coils used in innerspring mattresses. According to Seattle Mattress Company, this coil type was invented by Serta. Currently, Serta is the largest user of continuous coils. Serta's continuous coils are manufactured by Leggett & Platt under the trade name...
Offset (Karr) Coils [caption id="attachment_705" align="aligncenter" width="642"] Offset Coil System Image from Bedrooms & More, Seattle, Washington[/caption] Offset coils, also called Karr coils, were invented in the early 1900s by Frank Karr, who also started the Spring Air mattress company. They were developed from Bonnell coils, the original support for innerspring mattresses. Since the inception of offset coils, they have been used by many other mattress companies. The...
Bonnell Coils Bonnell Coil System, Image from Bedrooms & More, Seattle, Washington The oldest type of coil used in mattresses is the Bonnell coil. Bonnell coil mattresses are often called "traditional mattresses" or "traditional innerspring mattresses." Other types of coils have been developed since, but they all originate in the Bonnell coil. Bonnell coils themselves were developed from buggy seat springs. They are hourglass shaped. The ends are knotted, the end of the wire...
Rayon (Viscose) A sample of rayon from a skirt, photographed with a macro lens. from Wikipedia The oldest man-made fiber is rayon. It is formed of dissolved cellulose extracted from wood. Although almost any woody plant can supply the wood, some of the more common sources were conifers such as spruce, hemlock and pine. That was when most rayon was produced in North America and Europe. Now that the largest producer of rayon is in India, woods from that part of the world are commonly used,...
[caption id="attachment_565" align="aligncenter" width="300"] Polyester Fiber (Wikipedia Commons [PD]), from photo by Edward Dowlman, taken at Strathclyde University[/caption] Polyester Polyester, sometimes just called “poly,” is a long-chain polymer. According to the Federal Trade Commission, a polymer has to be at least 85% esters to be classified as polyester. There are several kinds of polyester, but the kind abbreviated PET is made into fabrics. PET is also the substance of...
Box Spring (from US-Mattress) Box Springs A box spring is a sturdy frame–usually wood–on which springs are mounted. The frame and springs are covered in cloth, usually with padding on the top and a base pad on the bottom. According to the Merriam-Webster online dictionary, the first known use of the term “box spring” was in 1865.[1] The term box spring is sometimes alternatively spelled box-spring. Making it one word, boxspring, is generally not acceptable. Traditionally, the...
European Wood Slats – In Europe, the preferred foundations have several closely spaced slats made from a springy wood, such as beech. The resiliency of the wood makes the wood slat foundation absorb shock, much like a box spring. The springiness of wood can be felt walking over a wooden floor as opposed to a concrete surface. Unlike the box spring, a wood slat foundation does not depend on metal, making it preferred by persons wary of the amplification of electromagnetic radiation...
Phase-Change Materials (PCMs) [caption id="attachment_521" align="aligncenter" width="277"] Ice Cubes (from BedTimes Magazine)[/caption] Consumers now occasionally see the terms “phase-change materials” or “PCM s” in descriptions of clothing or bedding. Each season, more manufacturers use PCMs in their products, some even making them a selling point. Even a casual reading tells us that phase-change materials have something to do with comfortable temperatures. More exactly, PCMs are...
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