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Accu-Sort Systems
The other method uses a heated bar and the paper moves across the bar. Another type of thermal printer is called a Thermal
Transfer printer. The main difference between this type of printer and a thermal printer is the use of heat sensitive ribbons as
opposed to heat sensitive paper. This type of printing is permanent on label stock.
Common Problems with thermal printing
Since the paper used is heat activated the labels will deteriorate over time in a warm environment. Infrared scanners cannot detect
the bar codes and consequently a visible red light laser must be used to scan these codes.
Benefits of thermal printing
Thermal printers are quiet and inexpensive.
Thermal Transfer
A printing system like thermal except a one-time ribbon is used and common paper is used as a substrate. Eliminates the
problems of fading or changing color inherent in thermal printing.
Tilt
Rotation around the Z axis. Used to describe the position of the bar code with respect to the laser scan line.
Trigger
(Also known as cart) A signal, typically provided by a photoeye or proximity switch, that informs the scan head of the presence
of an object within its reading zone.
UCC (Uniform Code Council)
The organization which administers the UPC and other retail standards.
Undersquare
Used to describe bar codes that are longer (from the first to last bar) than they are high (from the top to bottom of the bars).
UPC
Acronym for Universal Product Code. The standard bar code type for retail food packaging in the United States.
UPS
The abbreviation for uninterruptible power supply. A battery-powered unit that automatically supplies power to your computer in
the event of an electrical failure.
Utility
A program used to manage system resources including memory, disk drives, and printers.
Vane Raster
Decreases the amount of scans possible due to a smaller percentage of scans bisecting the code.
Verifier
A device that makes measurements of the bars, spaces, quiet zones and optical characteristics of a symbol to determine if the
symbol meets the requirements of a specification or standard.
Vibrating Vane
A variable raster that can have an unlimited number of raster lines. It covers a larger area and is adjustable.
Visible Laser Diode
A light source used in scanners to illuminate the bar code symbol. Generates visible red light at wavelengths between 660 and
700 nM. Replaced Helium-Neon tubes in most scanners because they are small and consume less power.
Void
The undesirable presence of an area of high reflectance in a bar.
Wand Scanner
A hand-held contact laser scanner that an operator guides across the bar code.
Wedge
A device that plugs in between a keyboard and a terminal. It allows data to be entered either by keyboard or by various types of
scanners.
Wide Bar (WB)/Wide Space (WS)
Widest code element, bar or space, in the bar code symbol.
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