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A jar opener is a kitchen device which is used to open glass or plastic jars. A jar is sealed by either (a) a screw-off rubberised lid or (b) a lid placed on the opening of the jar with a rubber sealing-ring between. Screw-off lids are usually made of metal with a thin rubber sealing layer, whereas lift-off lids mostly consist of glass.
A traditional jar opener for a screw-off lid will have two handles, leading up to two concentric grooved rings which can be used to fit different lids. It sometimes incorporates a bottle opener. There are many models, including rubber sheet grip models (called "rounds") and rubber timing belt loop models. Rounds are common promotional items, and mechanically the simplest type of jar opener. [1]
Jar openers designed to wedge open a lid sealed by a rubber ring were patented and produced in Germany in the mid 1930s, but all production has halted following the turn of the century. On the far below right is an example of a wooden vintage jar opener for fruit preserve jars, which must be air tight to prevent food spoilage
Some people smaller hands cannot readily remove the lids of some glass jars, lacking either sufficient strength and/or leverage. Some people with disabilities simply cannot open a jar, while others simply prefer the ease that comes with a jar opener. [2]
Black & Decker produced the first automatic jar opener in 2003. [3]
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