Which Type of Printer Uses a Print Head Ribbon and Tractor Feed
Inkjet Printers
Inkjet printers are non-impact printers which print text and images by spraying tiny droplets of liquid ink onto paper. They are the most popular printers for home use.
Currently, most inkjet printers use either thermal inkjet or piezoelectric inkjet technology. Thermal inkjet printer uses heating element to heat liquid ink to form vapor bubble, which forces the ink droplets onto the paper through the nozzle. Most inkjet manufacturers use this technology in consumer inkjet printers.
The inkjet head design is also divided into two main groups: fixed-head and disposable head. Fixed-head is built into the printer and should last for the whole life of the printer. It produces more accurate output than cheap disposable head. The ink cartridges for fixed head printers are also cheaper as the print head does not need to be replaced. However, if the head is damaged, the entire printer has to be replaced.
Although inkjet printers are generally used in home and small businesses, some manufacturers, such as Hewlett Packard, have produced high end inkjet printers for industrial use. These professional inkjet printers are usually used to print advertising graphics or technical drawings.
The Process of a Inkjet Printer:
Advantages of inkjet printers: Disadvantages of inkjet printers:
|
|
Laser printers are non-impact printers which can print text and images in high speed and high quality resolution, ranging from 600 to 1200 dpi.
Unlike inkjet printers, laser printer use toner (black or colored powder) instead of liquid inks. A laser printer consists of these major components: drum cartridge, rotating mirror, toner cartridge and roller. The drum cartridge rotates as the paper is fed through. The mirror deflects laser beam across the surface of the drum. Laser beam creates charge that causes the toner to stick to the drum. As the drum rotates and presses on paper, toner is transferred from the drum to paper, creating images. Rollers then use heat and pressure to fuse toner to paper. Colored laser printers add colored toner in three additional passes.
Advantages of laser printers:Disadvantages of laser printers:
|
|
Impact Printers
Impact printers create an image by using some mechanism to physically press an inked ribbon against the page, causing the ink to be deposited on the page in the shape desired. These printers are typically loud, but remain in use today because of their unique ability to function with multiparty forms.
The ribbon provides both the ink for printing and the lubrication for the pinheads. the quality of the print is poor to other types of printers.
Three reasons you see Impact Printers still is use.
- They use continuous tractor feeds and fan fold paper rather than individual sheets of paper, Making them useful for logging events or data.
- They can use carbon paper to print multiple copies at the same time.
- They are extremely durable, give little trouble and seem to last forever.
|
|
Thermal printers use two types of printing technologies: direct thermal and thermal transfer printing.
Traditional thermal printers use direct thermal method by pushing electrically heated pins against heat-sensitive paper (thermal paper). The coating on the thermal paper turns black in the areas where it is heated, producing characters or images. Direct thermal printers have no ink, toner or ribbon. These printers are durable, easy to use and cost less to print than other printers. However, the thermal paper is sensitive to heat, light, water, and abrasion and the text and images may fade over time.
Thermal printers are often used in cash registers, ATM and point-of-sales terminals. Direct thermal printing was used in some older fax machines before the 21st century. However, these old models are now replaced by new machines which use laser and inkjet printing. Thermal printing is still considered as the best technology for bar code printing because it produces accurate, high quality images with exact bar widths. Some portable printers and most label printers still use thermal printing method.
In thermal transfer printing, a thermal print head applies heat to a heat-sensitive ribbon, which melts ink onto paper and a wide range of materials to form text and images. The printouts can be extremely durable and can be stored over long period of time.
| |
About Solid Ink Printers
Solid ink is a technology used in computer printers and malfunction devices originally credited with creation by Tektronix in 1986. After Xerox acquired the Tektronix Color Printing and Imaging Division in 2000, the solid ink technology became part of the Xerox line of office printing and imaging products. Early offerings focused on the graphic arts industry.
However after a legal battle with Data products Corporation, Tektronix ended up paying royalties to Data products for the use of the technology.
The first solid ink printer, The SI-480, was developed and released to the market in 1988 by Data products Corporation. This was a monochrome printer that met with limited success.
The first Colored Solid Ink Printer was also released by Data products Corporation release date to be verified
The Phase 3 product introduced in 1991 cost $10,000 US. As the technology improved and costs were reduced, the focus shifted to office printing environments where quality and cost efficiency are important.
Design
Solid ink technology utilizes solid ink sticks in lieu of the fluid ink or toner powder usually used in printers. After the ink stick is loaded into the printing device, it is melted and used to produce images on paper in a process similar to offset printing. Xerox claims that solid ink printing produces more vibrant colors than other methods, is easier to use, can print on a wide range of media, and is more environmentally friendly due to reduced waste output.
The sticks are non-toxic and safe to handle. In the mid 1990 s, the president of Tektronix actually ate part of a stick of solid ink, demonstrating that they are safe to handle and presumably, eat. The medium of the ink was (at least at the time) made from food-grade processed vegetable oils.
Printer Features
Printers can have variety of options, Including extra paper trays to hold different sizes of paper, special paper feeders or transparency feeders, staplers, collators,and sorters. Printers can print in color or black and white, and printers can print on one side of the page or automatically print both sides, that's call duplex printing. Some low end printers offer manual multiplexing, which makes it possible for you to print on both sides by putting the paper through again.
Printers can also be combined with fax machines, copiers, and scanners in the same machine. Most often, Printers and scanners are powered by AC power or by using an AC adapter that converts power to DC. Some printers are battery powered.
You also need to consider how the printer will connect to the computer or network. A network printer has an Ethernet port to connect directly to a computer by using a USB port, Parallel port, serial port, wireless connection, blue tooth, infrared and WiFi. Some printers have both an Ethernet port and USB. Printer will be connected depend on which port it will have on it.
Example of some features for printers
Source: https://sites.google.com/site/tvcccis111en200811/printer-types
0 Response to "Which Type of Printer Uses a Print Head Ribbon and Tractor Feed"
ارسال یک نظر