Sold Out

    Thermal / Ultrasound Printer – NSL UP-X898MD Sony (Japan)

    0reviews
    0out of 5

    125,000

    Out of stock

    超声打印机(或direct thermal printing) is adigital printingprocess which produces a printed image by selectively heating coatedthermochromic paper, orthermal paperas it is commonly known, when the paper passes over the thermal打印头. The coating turnsblackin the areas where it is heated, producing an image. Two-colour direct thermal printers can print both black and an additionalcolour(oftenred) 通过应用heatat two differenttemperatures.rmal transfer printingis a very different method that uses a heat-sensitive ribbon instead of heat-sensitive paper, but uses similar thermal print heads.

    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 thermosensitive paper

    In order to print, thermo-sensitive paper is inserted between the thermal head and the platen. The printer sends an电流to the加热元素of the thermal head, which generate heat. The heat activates the thermo-sensitive coloring layer of the thermosensitive paper, which changes color where heated. Such a printing mechanism is known as athermal systemordirect system. The heating elements are usually arranged as a line of small closely spaced dots.

    The paper is impregnated with a solid-state mixture of a dye and a suitable matrix; a combination of afluoranleuco dyeand anoctadecylphosphonic acidis 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 (a process known asthermochromism).

    Baidu