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churchkey
A churchkey or church key is any of various kinds of bottle openers and can openers.
== History ==
A churchkey initially referred to a simple hand-operated device for prying the cap (called a "crown cork") off a glass bottle; this kind of closure was invented in 1898, although there is no evidence that the opener was called a "church key" at that time.〔(Churchkey )〕 The shape and design of some of these openers did resemble a large simple key.〔(January 1980 JFO Newsletter )〕
In 1935, beer cans with flat tops were marketed, and a device to puncture the lids was needed. The same term, "church key", came to be used for this new invention: made from a single piece of pressed metal, with a pointed end used for piercing cans — devised by D.F. Sampson〔(United States Bartenders Guild~Newsletter )〕〔(Short History of the Beer Can (part 2) :: Streeter's Electronics :: Home of The Treasure Hunter's Gazette, BONE, and PTHHS )〕 for the American Can Company, who depicted operating instructions on the cans,〔(Flat Top Beer Cans )〕 and typically gave away free "quick and easy" openers with their beer cans.〔(Opening Instruction Cans )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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