The thermal printer has been used for many years, but it was not used until high quality bar code printing until the early 1980s. The principle of a thermal printer is to coat a layer of transparent film on a pale material (usually paper) and turn the film into dark (usually black and blue) for a while. The image is generated by heating and producing a chemical reaction in the membrane. This chemical reaction is carried out at a certain temperature. Thermal Printer High temperature will accelerate this chemical reaction. When the temperature below 60 ℃, the film needs to go through a long, or even up to several years to become dark; and when the temperature is 200 ℃, this reflection will be completed in a few microseconds.
Thermal printer, the use of thermal printing technology, that is, the use of specialized thermal paper, chemical reaction at high temperatures and discoloration, Thermal Printer in order to achieve the effect of printing. In addition to needle printing, thermal printing technology with a small noise, fast, clear print and other characteristics, is now in the banking system, POS terminal systems, medical equipment, Thermal Printer and other aspects of a wide range of applications.
The thermal printer selectively heats the determined position of the thermal paper, thereby producing a corresponding pattern. The heating is provided by a small electronic heater on the printhead in contact with the thermosensitive material. The heater is arranged in the form of a square or strip in the form of a logic control by the printer, Thermal Printer and when driven, a pattern corresponding to the heating element is produced on the thermal paper. Control the heating logic of the same logic circuit, but also control the feed, Thermal Printer which can be printed on the entire label or paper graphics.
The most popular thermal printer uses a fixed printhead with a heated lattice, with the printheads shown in the figure, with 320 square points, each 0.25mm × 0.25mm. With this dot matrix, the printer can print the dot at any position on the thermal paper. This technology has been used on paper printers and label printers.
The paper feed speed is usually measured as a thermal printer when the speed is 13 mm / s. However, when the label format is optimized, some printers can play twice the speed. This thermal printer process is relatively simple, and thus can be made into a portable battery-driven thermal label printer. Due to the flexible format of the thermal printer, Thermal Printer the image quality is high, fast and low cost, Thermal Printer it prints out the bar code label is not easy to store in the environment above 60 ℃, or exposed to ultraviolet light (such as direct sunlight) Time to store. Therefore, the thermal bar code label is usually limited to indoor use.
The thermal printer works by installing a semiconductor heating element on the printhead. The print head is heated and touched with the thermal paper to print out the desired pattern. The principle is similar to that of a thermal printer. The image is generated by heating and producing a chemical reaction in the membrane. Thermal Printer This chemical reaction is carried out at a certain temperature. High temperature will accelerate this chemical reaction. When the temperature is below 60 ℃, the paper needs to go through a long, or even several years to become dark; and when the temperature is 200 ℃, this reflection will be completed in a few microseconds.