Thermal printer is generally used in supermarkets such as small ticket printer, POS cash register printing, bank ATM machine bills and other places, the installation of thermal paper can be printed directly, without adding ink without ribbon, low cost.
The working principle of the thermal printer is to install the semiconductor heating element on the print head. After the print head is heated and touched with the thermal paper, Thermal Printer the desired pattern can be printed. The principle is similar to that of the thermal fax machine. The image is generated by heating and producing a chemical reaction in the film. The thermal reaction of this thermal printer 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, Thermal Printer or even several years to become dark; and when the temperature is 200 ℃, this reflection will be completed in a few microseconds.
The thermal printer has been used for many years, but it was not until the early 1980s used for high quality bar code printing. The principle of a thermal printer is to coat a layer of transparent film on a pale material (usually paper) and turn the film after a period of time to become dark (usually black and blue). The image is generated by heating and producing a chemical reaction in the film. 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 film needs to go through a long period of time, or even a few years to become dark; Thermal Printer and when the temperature is 200 ℃, this reflection will be completed in a few microseconds.
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 heat sensitive material. The heater is arranged in the form of a square or strip in the form of a logic control by the printer, and when driven, a pattern corresponding to the heating element is produced on the thermal paper. Thermal Printer Control the heating logic of the same logic circuit, but also control the paper feed, 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 location on the thermal paper. Thermal Printer This technology has been used on paper printers and label printers.
Usually when the thermal printer to print the paper feed speed as a rating indicator, that is, the speed of 13mm / s ?. However, when the label format is optimized, Thermal Printer 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, the image quality is high, fast and low cost, 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.