In real life, if a person is developed and has a way to make money, he will then bring his relatives and friends to the road to prosperity.
Then it will appear, relatives with relatives, fellows with fellow villagers, people from the same place all engaged in the same industry, and later monopolized the entire industry.
Print shops can be seen everywhere in the streets. If you are careful, you will find that the print shop owners are basically Hunan accents. This is because more than 80% of the print shops in China are opened by Hunan Xinhua people. They are repaired from the earliest. The typewriter started, gradually began to repair the copier, reselling used products, and formed a complete industrial chain. Nearly 200,000 people in Xinhua County are engaged in this industry. There are still many industries in China, such as Tonglu people doing express delivery, Qinghai Longren opened Lanzhou Ramen shop, Fujian Lianjiang people opened Internet cafes, and the hospital opened by Putian people.
The printer is an indispensable office equipment nowadays. It is one of the external output devices of the computer. It can print the edited files, data, pictures, information, etc. in black or color to various carriers in computers, mobile phones and other devices. On paper, film, plastic film).
Printer history
The first dot matrix printer appeared in 1885, but it was not introduced to the market for technical reasons.
In 1968, Seiko Co., Ltd. launched a dot matrix printer and launched the market for commercial use.
The first inkjet printer was born in 1976
The first commercial laser printer that combined laser technology and electrophotographic technology appeared in 1977
In 1991, HP introduced the first LAN printer, and started network printing.
In 1993, Lenovo introduced the first Chinese laser printer.
HP introduced automatic two-sided printing and color laser printers in 1998
The first 9-color photo printer was born in 2003
In 1983 the birth of the first 3D printer, this machine is named "SLA-1", the function is described as rapid prototyping.
Type of printer
There are many types of printers, special printers for financial use, portable printers for portable use, and Bluetooth printers. The most common types of printers we use are the following four types: laser printers, dot matrix printers, and inkjet printers. Thermal printer.
The laser printer is a print output device that combines laser scanning technology and electrophotographic technology. Its print quality is higher, the speed is faster, and the cost is relatively high. The laser printer controller has a CPU, has memory, and the controller is equivalent to a computer. The motherboard, which can perform text, image, and graphics processing, which cannot be done by other printers. (It’s the toner cartridge, which is basically the case in the print shop.)
The dot matrix printer plays an important role in the history of printers. It serves some special users. It has low printing cost and simple operation. It has always had its own market share since its birth, but its working noise is low due to its low print quality. Can not meet the requirements of all users, so now can only be seen in some places where the ticket is printed. (Invoice-specific, the previous year's express delivery is also used in the dot matrix printer)
Color inkjet printers have a good printing effect and low price to occupy the low-end market. In addition, it has flexible paper processing capabilities, which can print paper as a common medium, and can also print various films and photos. Various special media such as paper, CD cover, and roll paper.
The most contact with thermal printers is in the supermarket. There are labels on the products, barcodes, and small tickets at checkout. The lottery is also thermal printing. The heat can be seen from the name. It is sensitive when it is hot. I have to buy a lottery ticket and keep it in a safe place. Don't just take it in your pocket. It is especially easy to damage. It won't win the prize. It's too late to win the prize.
How the printer works
1. The principle of laser color printer is the same as that of black laser printer. It uses laser scanning technology, but black laser printer only has one kind of black toner. Color laser printer has yellow, red, blue and black inks. powder.
First, the printing signal from the computer is converted into a pulse signal and transmitted to the laser. The main charging roller charges the photosensitive drum with negative electricity, and is equipped for imaging. Then, the laser controlled by the image information is irradiated onto the photosensitive drum, and the irradiated area is irradiated. Bring positive power to form a latent image.
Then the toner in the silo is continuously agitated and transferred to the developing roller by a powder feeding roller. The developing blade lands the toner on the developing roller with a certain thickness, and the toner is transferred between the different components. The negative charge can be adsorbed onto the positively charged area of ​​the drum surface, and the toner on the drum is then transferred to the paper.
The paper with toner passes through the heating element, allowing the toner to melt and penetrate into the paper.
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