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Encyclopedia > Thermal printer

A thermal printer (or direct thermal printer) produces a printed image by selectively heating coated thermochromic paper, or thermal paper as it is commonly known, when the paper passes over the thermal print head. The coating turns black in the areas where it is heated, producing an image. Two-color direct thermal printers are capable of printing both black and an additional color (often red), by applying heat at two different temperatures. A ticket printed on thermal paper. ... A ticket printed on thermal paper. ... This does not cite any references or sources. ... Black cat, thought by some to cause bad luck (see superstition) Black is the shade of objects that do not reflect light in any part of the visible spectrum. ... Color is an important part of the visual arts. ... Red is any of a number of similar colors evoked by light consisting predominantly of the longest wavelengths of light discernible by the human eye, in the wavelength range of roughly 625–750 nm. ... For other uses, see Heat (disambiguation) In physics, heat, symbolized by Q, is energy transferred from one body or system to another as a result of a difference in temperature. ... This article includes a list of works cited or a list of external links, but its sources remain unclear because it lacks in-text citations. ...


Thermal transfer printing is a related method that uses a heat-sensitive ribbon instead of heat-sensitive paper. Thermal transfer Barcode Printers Barcode Printers typically come in fixed sizes of 4 inches, 6 inches or 8 inches wide. ...


Essential mechanisms

A thermal printer comprises these key components:

  • Thermal head — generates heat; prints on paper
  • Platen — a rubber roller that feeds paper
  • Spring — applies pressure to the thermal head, causing it to contact the thermo-sensitive paper
  • Controller boards — for controlling the mechanism

In order to print, one inserts thermo-sensitive paper between the thermal head and the platen. The printer sends an electrical current to the heating resistor of the thermal head, which in turn generates heat in a prescribed pattern. The heat activates the thermo-sensitive coloring layer of the thermo-sensitive paper, which manifests a pattern of color change in response. Such a printing mechanism is known as a thermal system or direct system. In electricity, current refers to electric current, which is the flow of electric charge. ... Thermal resistance has two different meanings: 1) the temperature difference across the structure when a unit of heat energy flows through it in unit time or 2) the temperature difference across a unit area of a material of unit thickness when a unit of heat energy flows through it in...


The paper is impregnated with a solid-state mixture of a dye and a suitable matrix; a combination of a fluoran leuco dye and an octadecylphosphonic acid is an example. When the matrix is heated above its melting point, the dye reacts with the acid, shifts to its colored form, and the changed form is then conserved in metastable state when the matrix solidifies back quickly enough. See thermochromism. A leuco dye is a dye whose molecules can acquire two forms, one of which is colorless. ... A mood ring shown face front. ...


Controller boards are embedded with firmware to manage the thermal printer mechanisms. These controller boards’ features are designed to meet the needs in terms of functionalities and specifications.


The Firmware can manage multiple bar code types, graphics and logos. They enable the user to choose between different resident fonts (also including Asian fonts) and character sizes. In computing, firmware is software that is embedded in a hardware device. ...


Controller boards can drive various sensors like paper low, paper out, door open, top of form etc., and they are available with the most commonly used interfaces (RS232, Parallel, USB, wireless). For POS application some boards can also control the cash drawer. A cash drawer is generally a compartment underneath a cash register in which the cash from transactions is kept. ...


Applications

Thermal printers print faster and more quietly than dot matrix printers. They are also more economical[1] since their only consumable is the paper itself. Even though the paper is more expensive, printers can be rapidly refilled, leading to almost zero downtime. Possible commercial applications of thermal printers include filling station pumps, information kiosks, point of sale systems, and voucher printers in slot machines. A dot matrix printer or impact matrix printer refers to a type of computer printer with a print head that runs back and forth on the page and prints by impact, striking an ink-soaked cloth ribbon against the paper, much like a typewriter. ... This article does not cite any references or sources. ... a pagoda-like kiosk in Lausanne. ... POS must not be confused with EFT/POS and POS Terminal used in Electronic payment POS or PoS is an acronym for point-of-sale (or point of purchase). ... Slot machines in the Trump Taj Mahal A slot machine is a certain type of gambling machine. ...


Through the 1990s, many fax machines used thermal printing technology. Toward the beginning of the 21st century, however, thermal wax transfer, laser, and inkjet printing technology largely supplanted thermal printing technology in fax machines in order to allow plain-paper printouts. For the band, see 1990s (band). ... A Samsung fax machine Fax (short for facsimile, from Latin fac simile, make similar, i. ... The 21st century is the present century of the Anno Domini (common) era, in accordance with the Gregorian calendar. ... Thermal transfer Barcode Printers Barcode Printers typically come in fixed sizes of 4 inches, 6 inches or 8 inches wide. ... 1993 Apple LaserWriter Pro 630 laser printer A laser printer is a common type of computer printer that rapidly produces high quality text and graphics on plain paper. ... Inkjet printers are a type of computer printer that operates by propelling tiny droplets of liquid ink onto paper. ...


The Game Boy Printer, made in 1998, was a small thermal printer used to print out certain elements from some Game Boy games. The GameBoy Printer The Game Boy Printer (named by Pocket Printer in Japan) Nintendo is a thermal printer designed for the Game Boy and Game Boy Color systems and was released in 1998. ... 1998 1998 in games 1997 in video gaming 1999 in video gaming Notable events of 1998 in video gaming. ... The Game Boy ) is a handheld game console developed and manufactured by Nintendo, released in 1989 at US$89. ...


Early formulations of the thermo-sensitive coating used in thermal paper were sensitive to incidental heat, abrasion, friction (which can cause heat, thus darkening the paper), light (which can fade printed images), and water. However, more modern thermal coating formulations have resulted in exceptional image stability; theoretically, thermally-printed text should remain legible at least 50 years. Abrasion on the palm of a right hand, shortly after falling Abrasions on elbow and lower arm, still healing. ... Friction is the force that opposes the relative motion or tendency toward such motion of two surfaces in contact. ... Impact from a water drop causes an upward rebound jet surrounded by circular capillary waves. ...


Experience[attribution needed] shows that as of 2006, plenty of newly-made thermal prints (sales receipts, invoices printed by service-engineers on briefcase laptop and printer etc.) will fade completely to white in under 12 months even if kept in the dark.[citation needed] Where documents are to be archived, a toner-based (or other permanent ink) photocopy should be made. 2006 is a common year starting on Sunday of the Gregorian calendar. ...


Some UK hospitals have begun recording fœtal ultrasound scan images on thermal paper. This can cause problems if the parents wish to preserve the image by laminating it using a traditional laminator, as the heat will cause the entire page to darken. It is advisable to test the laminator using thermal fax paper, or an unwanted thermal POS receipt to see if this happens. As before, an option is to make a permanent ink duplicate of the image, and laminate that, testing first to ensure that the copying process won't darken the image either. Ultrasound is a form of cyclic sound pressure with a frequency greater than the upper limit of human hearing, this limit being approximately 20 kilohertz (20,000 hertz). ... This article is being considered for deletion in accordance with Wikipedias deletion policy. ...


See also


  Results from FactBites:
 
Thermal transfer printer - Wikipedia, the free encyclopedia (332 words)
Thermal wax transfer printers function by adhering a wax-based ink onto paper.
Monochrome printers have a fl panel for each page to be printed, while color printers have either three (CMY) or four (CMYK) colored panels for each page.
Printers like the Xerox Phaser 8400 use wax blocks of approximately 1 in³ which are loaded into a system similar to a stapler magazine in the top of the printer.
thermal printer - definition of thermal printer in Encyclopedia (185 words)
Direct thermal printers are increasingly replacing the dot matrix printer for printing cash register receipts, both because of the higher print speed and substantially quieter operation.
Until about 2000, most fax machines used direct thermal printing, though now only the cheapest models use it, the rest having switched to either thermal wax transfer, laser, or ink jet printing to allow plain-paper printouts.
Direct thermal paper suffers from sensitivity to heat, abrasion (the coating can be fragile), friction (which can cause heat, thus darkening the paper), light (causing it to fade), and water.
  More results at FactBites »

 
 

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