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...
What kinds of springs are in your mattress? Metal Springs The best selling mattresses over time have been innerspring mattresses. The first mattress springs were adapted from buggy seat springs. These springs are called Bonnell coils. For a long time, they were the only kind of springs used in mattresses. Now there are several types of innerspring coils. The major kinds are Bonnell, Offset, Continuous and Pocket. Within each of these kinds are variations. Each type of innerspring has its own...
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