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First barcode and printer work
Release time:2013-05-22 Source:admin Reads:
The barcode labels as fast and accurate data processing substrate are widely used in various industries. 　Small shops to large-scale logistics enterprises, barcode labels made a great contribution in information processing. Make the job simple and quick. 　The first patent for a bar code type product (US Patent #2,612,994) was issued to inventors Joseph Woodland and Bernard Silver on October 7, 1952. The Woodland and Silver bar code can be described as a "bull's eye" symbol, made up of a series of concentric circles. Examine the 1958 patent drawing (see first image) that depicts the Woodland's and Silver's bar code label and the 1958 patent drawing (see second image)of the inventors' bar code scanner technology. The photo below left is an example of today's U.P.C. bar code on a product package. 　To made barcode labels always need a barcode printer. That is a computer peripheral for printing barcode labels or tags that can be attached to physical objects. Barcode printers are commonly used to label cartons before shipment, or to label retail items with UPCs or EANs. The most common barcode printers employ one of two different printing technologies. Direct thermal printers use a printhead to generate heat that causes a chemical reaction in specially designed paper that turns the paper black. Thermal transfer printersalso use heat, but instead of reacting the paper, the heat melts a waxy or resin substance on a ribbon that runs over the label or tag material. The heat transfers ink from the ribbon to the paper. Direct thermal printers are generally less expensive, but they produce labels that can become illegible if exposed to heat, direct sunlight, or chemical vapors. 　Barcode printers are designed for different markets. Industrial barcode printers are used in large warehouses and manufacturing facilities. They have large paper capacities, operate faster and have a longer service life. For retail and office environments, desktop barcode printers are most common.

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