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It is a common tool used not only to open metal containers of canned foods that are sold, but it is also used in many workshops and service stations to open cans of oil, cola and other products. There is a great variety of this utensil, from the simplest type with no moving parts to the more common they have a circular blade which rotates with a handle (or an electric motor), while a sprocket moves the blade in back of the can.
The curious history of the opener practical cans were not invented until nearly half a century after the first tins appear on the market. The need to transport food to the troops on the war front was the motivation for the emergence of this type of packaging. the oar patchogue The first English cannery, founded in 1812 by civil and industrial engineer Bryan Donkin English (1768-1855), put a label on their products informing consumers that to open the cans was necessary to cut around the top, along the edge, with a chisel and hammer. the oar patchogue This was because the first thick walled cans had to be opened iron required the use of the chisel and hammer. In the case of the soldiers with the point of the bayonet or rifle shot. In 1833, a French name Angibert proposed amendments the oar patchogue to open it allow melting the solder around the lid. Another French known as Bonvert suggested a welded steel wire between the cap and the body of the can to be removed by application of heat.
The first can openers were complicated mechanisms used by store employees, who opened the can before handing it to the customer the oar patchogue as Ezra Warner of Waterbury, Connecticut State in estaduniddense. Was a large and impressive apparatus, which seemed in part with a bayonet and partly with a scythe. Introduced their great curved blade at the edge of the can and through the force, made up with her to slide on the whole side. A distraction could lead to serious accidents. The opener as we use today, with a cutting wheel that spins around the rim of the can, was invented by American William Worcester Lyman (1821-1891), who patented it in 1870. The Star Can Opener Company of San Francisco, perfected this device, adding it a toothed wheel, called feeder wheel, thanks to which the package was spinning the first time in opposite direction to the wheel. This basic principle the oar patchogue is still used today and was the basis of the first electric can opener, patented in 1931.
The opener came when more practical tins cans became lighter when the packages began to be made of tin, in the mid nineteenth century and the opening became easier. When English was Robert Yates patented an opener known as "ox head" (1858), a steel blade stuck in a cast iron body. The biting wheel was invented by William Lyman in 1870.
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