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The hand and foot warmer was first patented by Jonathan T. Ellis of New Jersey in 1891, [1] though no evidence exists that it was ever produced. [2]The first commercially produced hand warmer was created by Japanese inventor Niichi Matoba.
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Silicone coated drum heaters are suitable for steel drums, whereas polyester coatings at lower temperatures can be used for plastic containers. As these heaters are flexible and wrap around the container they may also be called band heaters. Up to three band heaters can be applied to a standard 200 litre barrel.
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A sodium acetate heat pad. Disposable chemical pads employ a one-time exothermic chemical reaction.One type, frequently used for hand warmers, is triggered by unwrapping an air-tight packet containing slightly moist iron powder and salt or catalysts which rusts over a period of hours after being exposed to oxygen in the air.
Rechargeable Hand Warmers A great gift if she loves hiking and camping, these rechargeable hand warmers take just two minutes to begin heating and will stay hot for up to four hours.
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