The printers utilizing inkjet technology were first introduced in the late 1980s and since then have gained much popularity while growing in performance and dropping in price. They are the most common type of computer printers for the general consumer due to their low cost, high quality of output, capability of printing in vivid color, and ease of use. Each printer which works on inkjet technology places extremely small droplets of ink onto paper to create a text or an image. In the personal and small business computer market, inkjet printers currently predominate. Inkjets are usually inexpensive, quiet, reasonably fast, and many models can produce high quality output. Like most modern technologies, the present-day inkjet is built on the progress made by many earlier versions. Among many contributors, Epson, Hewlett-Packard and Canon can claim a substantial share of credit for the development of the modern inkjet technology.
In the worldwide consumer market, four manufacturers account for the majority of inkjet printer sales: Canon, Hewlett-Packard, Epson, and Lexmark. The typical inkjet printer usually includes inkjet printhead assembly, paper feed assembly, power supply, control circuitry and interface ports. The inkjet printhead assembly contains several components. One of them is the printhead which is the core of the inkjet printer and contains a series of nozzles that are used to spray drops of ink. Another printhead component is the inkjet cartridge or inkjet tank. Depending on the manufacturer and model of the printer, ink cartridges come in various combinations, such as separate black and color cartridges, color and black in a single cartridge or even a cartridge for each ink color. The cartridges of some inkjet printers include the print head itself. The printhead along with the inkjet cartridge/s are moved back and forth across the paper by device called a stepper motor using a special belt.
Some printers have an additional stepper motor to park the print head assembly when the printer is not in use which means that the print head assembly is restricted from accidentally moving. The print head assembly uses a stabilizer bar to ensure that movement is precise and controlled. One of the paper feed assembly components is the paper tray or/and paper feeder. Most inkjet printers have a tray that the paper is loaded into. The feeder typically snaps open at an angle on the back of the printer, allowing the paper to be placed in it. Feeders generally do not hold as much paper as a traditional paper tray. A set of rollers pull the paper in from the tray or feeder and advance the paper when the print head assembly is ready for another pass after which another step motor powers the rollers to move the paper in the exact increment needed to ensure a continuous image is printed.
While earlier printers often had an external transformer, most printers sold today use a standard power supply that is incorporated into the printer itself. A small but sophisticated amount of circuitry is built into the printer to control all the mechanical aspects of operation, as well as decode the information sent to the printer from the computer. It is connected to the computer by a cable through the interface port. The interface port can be either parallel port, USB port or SCSI port. The parallel port is still used by many printers, but most newer printers use the USB port. A few printers connect using a serial port or small computer system interface (SCSI) port. Different types of inkjet printers exist based on the method they use to deliver the droplets of ink. There are three main inkjet technologies currently used by printer manufacturers. The thermal bubble technology used by manufacturers such as Canon and Hewlett Packard is commonly referred to as bubble jet. In a thermal inkjet printer, tiny resistors create heat, and this heat vaporizes ink to create a bubble. best art printer
As the bubble expands, some of the ink is pushed out of a nozzle onto the paper. When the bubble collapses, a vacuum is created. This pulls more ink into the print head from the cartridge. A typical bubble jet print head has 300 or 600 tiny nozzles, and all of them can fire a droplet simultaneously. Thermal inkjet technology is used almost exclusively in the consumer inkjet printer market. The ink used is usually water-based, pigment-based or dye-based but the print head is produced usually at less cost than other ink jet technologies. Contrary to the bubble jet technology, the piezoelectric technology, patented by Epson, uses piezo crystals. A crystal is located at the back of the ink reservoir of each nozzle. The crystal receives a tiny electric charge that causes it to vibrate. When the crystal vibrates inward, it forces a tiny amount of ink out of the nozzle. When it vibrates out, it pulls some more ink into the reservoir to replace the ink sprayed out.