Bellows refers to a device or instrument which is typically used to create a strong air current (blast of air) for blowing a fire. They are generally designed to have an air chamber, valve, nozzle (tube) and two handles
Generally, bellows can be used to provide air for a fire. The handles are joined together with a flexible leather bag (air chamber). When the handles are expanded, the valve draws in air to fill the air chamber and these air is then dispensed (expelled) through the nozzle (tube) by contracting (squeezing) the two handles which causes the air chamber to compress.
<em>Hence, the strong air current (blast of air) produced by bellows are used for blowing a fire. </em>
