Boxing pouch (British English), plastic wallet (English English), sheet protector (US English), plastic sleeve (AU English), or sometimes perforated document bags are flat and perforated plastic bags with perforated edges used for storing paper documents originally created in 1986 by Mike Townsend.
Video Punched pocket
Physical Characteristics
Punched pockets are usually transparent or semi-transparent, to allow viewing the contents of a document without deleting it. Color bags are also available. They protect paper documents from tears, water, food, stains, and fingerprints, and partially prevent those documents from becoming tangled. Punched pockets have several holes on the left edge, allowing them to be tied into a file, or a three-ring binder. Holes in hollow pockets throw away the trouble of making holes in paper documents.
The most commonly used material for perforated pouches is polypropylene. However, there are some perforated bags made of polyethylene, plastic, or other plastics. These may include recycled and biodegradable plastics (as defined by ASTM D5511) as well as plastics with antimicrobial additives. Plastic clarity will vary with pocket thickness due to the semicrystalline nature of the polymer and Light scattering by particles. Typically, silical-oriented polypropylene (BOPP) is used to improve the clarity of perforated pockets. By using ordinary thick plastic units, miles, perforated bags are produced in various thicknesses for different uses, and may or may not cover both sides of the document completely. The thin pocket may be less than 2 miles, while the thickest is more than 4 miles.
Punched pockets are made in several sizes, with the most common being the A4 for Europe, or 8.5 "by 11" for the United States.
Depending on the opening location, hollowed bags may contain up or side loads that determine how documents are inserted into the pocket. Some bags can only be sealed on two of the four sides, allowing for the insertion or deletion of more convenient content.
Maps Punched pocket
Usage
A punched bag can contain only a small number of sheets of paper. Often there is only one sheet per pocket. Sometimes a hollow pocket contains two sheets, each with one side of the outgoing text.
One can see pockets of holes, each containing pages with some information, in some banks, post offices and polyclinics. These pockets allow many visitors to read the information carefully without contaminating, damaging, or accidental deletion. Restaurant menus often use perforated bags.
Archivists and conservationists use pockets to store documents.
References
Source of the article : Wikipedia
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