Though this method was efficient, it was expensive. In the early 1980s, the laser printer was available for use. They were fast compared to dot matrix printers. Laser printers worked in silence as physical impact against a ribbon as in dot matrix printers was eliminated. In 1984, Hewlett Packard introduced the first desktop laser printer, the HP LaserJet. HP worked along with Canon and introduced the LaserJet. With the LaserJet, one could fit it on a desktop and produce fast, quality outputs with minimal noise. The laser printer was ideally used for memoranda, letterhead correspondence, and financial spreadsheets among other uses. Basic principles of inkjet technologyTo understand how an inkjet printer operates, we need to look at its components. The parts of a typical inkjet printer are categorized into the print head assembly and paper feeder assembly. The print head assembly is composed of: print head, ink cartridges, print head stepper motor, belt and stabilizer bar while the paper feeder assembly is comprised of: paper feeder, rollers, control circuitry, power supply, interface port(s) and paper feeder stepper motor. The print head contains nozzles that spray ink. Ink cartridges are the holding containers of the ink to be scattered. Printhead steeper motor is responsible for the movement of the print head and ink cartridges back and forth a paper. The print head assembly is attached to the stepper motor by a belt. There's the need to ensure the movement of the print head assembly is precise and monitored hence use of a stabilizer bar. Papers in the inkjet printer are loaded onto a paper feeder. Rollers pull the article from the feeder when the print head assembly is set for a pass. A power supply is incorporated inside the printer
Additive manufacturing1since it’s an electric device that requires power to run. A connection established between the printer and computer is via an interface port.Inkjet printing is a non-contact process of placing small droplets of ink on a paper to create an image. The ink is a solute dissolved or dispersed in a solvent. This process involves ejecting a fixed quantity of ink in a cartridge through a nozzle via a thermal or piezoelectric action. The ejected drop falls under gravity's effect and air resistance until it is in contact with the substrate, where it dries due to solvent evaporation. It is a process that can print products ranging from identical to entirely different products. Being a non-contact process, the method can be used to printfragile and non-flat surfaces. The process is digital, that is, the ink droplets positions can be located accurately on a grid under computer control. One key feature of inkjet printing is that it has a wide range of materials although they must be liquids during print time. The principle of inkjet printing falls into two major categories. The two major types are continuous inkjet (CIJ) and drop on demand (DOD) process.
- Fall '19
- Inkjet printer