Bottle opener capacity. A specific style of bottle opener is known as a churchkey. Invented at the same time as the crown cork, it is the original bottle opener. But as well as being portable it also comes as a fixed device to be attached to vertical surfaces, often with a tray to catch the bottle tops. It does not open wine bottles. It is class 2 fulcrum type. A simple opener is a piece of metal with a rectangular or rounded opening in one end and a solid handle large enough to be gripped between the thumb and forefingers on the
Can opener initially referred to a simple hand-operated device for prying the cap (called a "crown cork" or "bottle cap") off a glass bottle; this kind of closure was invented in 1892. The first of these church key style openers was patented in Canada in 1900. The shape and design of some of these openers did resemble a large simple key. In 1935, steel beer cans with flat tops appeared, and a device to pierce the lids was needed. The same opener was used for piercing those cans. Made from a single piece of pressed metal, with a sharp point at one