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A screw cap or closure is a common type of closure for bottles, jars, and tubes.. Common screw closures (from left to right): Plastic bottle with plastic screw cap, Dispensing closure for salad dressing (with inner seal), Break-away closure for syrup, Dispensing pump closure, Dispensing closure (with inner seal), Spray pump, Metal closure on glass jar, Child resistant closure, Cap on ...
Metal caps are usually either steel or aluminum, [1] and of the crown cork type. Flip-top caps (like flapper closures) preceded such caps. Plastic caps are used for plastic bottles, functioning as screw caps , or plastic caps may have a pour spout rather than being detachable.
A jerrycan or jerrican (also styled jerry can or jerri can) [1] is a fuel container made from pressed steel (and more recently, high density polyethylene). It was designed in Germany in the 1930s for military use to hold 20 litres (4.4 imp gal; 5.3 US gal) of fuel, and saw widespread use by both Germany and the Allies during the Second World War .
Unlike a lid or bottle cap, which encloses a container from the outside without displacing the inner volume, a bung is partially or wholly inserted inside the container to act as a seal. A bung can be defined as "a plug or closure used to close an opening in a drum or barrel. It is called a plug when referring to a steel drum closure." [1]
The crown cork (also known as a crown seal, crown cap or just a cap), the first form of bottle cap, was invented by William Painter in 1892 in Baltimore. The company making it was originally called the Bottle Seal Company, but it changed its name with the almost immediate success of the crown cork to the Crown Cork and Seal Company .
The jar lid has a rubber or rubber-like sealing surface and is held in place by a separate metal band. [8] Mason sold the patents for the Mason jar to the Sheet Metal Screw Company of Lewis R. Boyd in 1859. Boyd had patented a white "milk-glass" insert for the zinc screw lids to theoretically lessen the chances that food would be tainted by ...
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