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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]
A screw closure is a mechanical device which is screwed on and off of a threaded "finish" on a container. Either continuous threads (C-T) or lugs are used. Metal caps can be either preformed or in some instances, rolled on after application. Plastic caps may use several types of molded polymer. Some screw tops have multiple pieces.
The zip is bonded to the packaging by a heat activated adhesive that is pre-applied to the backing of the zip. The first resealable packaging with a zipper was licensed in the United States by Minigrip® in 1954. "Ziplock" is now used as a noun or adjective in relation to plastic bags using this type of seal regardless of manufacturer. [2]
A hermetic seal is any type of sealing that makes a given object airtight (preventing the passage of air, oxygen, or other gases).The term originally applied to airtight glass containers but, as technology advanced, it applied to a larger category of materials, including metals, rubber, and plastics.
These are designed for small bottles (similar to some of the flow fillers), but the hopper of the filler is set up to permit scan counting of tablets or candy pieces. [4] Positive displacement pump fillers: positive displacement, pump filling machines easily handle a wide range of container sizes, fill volumes and product types. While ...
Plug for a sink. A plug in sanitation is an object that is used to close a drainage outlet firmly. The insertion of a plug into a drainage outlet allows the container to be filled with water or other fluids. In contrast to screw on caps, plugs are pushed into the hole and are not put over the hole.
Overlapping pieces of metal can be joined by forming the weld pool within a hole made in the topmost piece of base metal. This is called a plug weld. Overlapping base metals are commonly joined using electric resistance welding, a process that combines heat and pressure and does not require a filler metal. Solid-state welding processes join two ...
Pressures sensitive liners are supplied pressed into closures and adhere to the bottle finish when the closure is applied. Pressure-sensitive liners stick to the container because one side is coated with pockets of adhesive. When the closure is applied to the container, the pockets of adhesive rupture between the closure and finish of bottle or ...
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