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Введення в іншомовне середовище (Warming-up).
3.Перевірка домашнього завдання: відтворення активного словника студентів на матеріалі попереднього заняття:
| 1. Dot – matrix printers 2. characters per second (cps) 3. dots per inch (dpi) 4. ink – jet printers 5. ink droplets 6. on, onto 7. nevertheless 8. bubble – jet printers 9. to produce at great speed 10. laser printers 11. beam 12. to transfer 13. in terms of 14. fonts 15. it goes without saying 16. thermal printers 17. electrosensitive methods 18. HP (Hewlett Packard) 19. photosetters 20. although 21. in addition 22. plotters 23. finally 24. engineering drawings 25. drafts | крапочно – матричний принтер символів за сек. крапок на дюйм струмінні принтери бульбочно - струмінні принтери лазерні принтери термопринтер провідна фірма – виробник: Hewlett Packard плоттер (устрій виводу графічного зображення на аркуш) |
4.Повідомлення теми:
§ Читання фрагменту тексту перекладачем та окремих – студентами: Types of printers
Types of printers
Printing is the final stage in creating a document. That is the purpose of the printers joined to your computing equipment. Since the results you can obtain with different types of printers will vary substantially, here is a guide to help you decide which one is most suitable for your needs. To begin with, it must be taken into account that printers vary in cost, speed, print quality and other factors such as noise or compatibility. In fact, printing technology is evolving so quickly that there is always a printer for every application or personal requirement.
Dot-matrix printers use pins to print the dots :s required to shape a character. They print text and graphics and nowadays some of them can print up to 450 characters per second (cps); however, they produce relatively low resolution output - 72 or 144 dots per inch. This level of 23 quality, while suitable for preliminary drafts, is not recommended for reports or books that have a wide audience. They are slower than laser printers but much cheaper.
One common type of non-impact printer is an ink-jet printer. It operates by projecting small ink droplets onto paper to form the required - image. This type of printer is quite fast, silent and not so expensive as a laser printer.
Nevertheless, you can expect high quality results because there are some ink-jet printers on the market with a resolution of 720 dpi.
Bubble-jet printers work the same way.
Laser printers produce output at great speed and with a very high resolution of 600/1,200 dpi. lb They scan the image with a laser beam and transfer it to paper with a special ink powder. They are constantly being improved. In terms of speed and image quality they are preferred by experts for different reasons: they have a wider range of scalable fonts, they can emulate different language systems, they can produce graphics, and they have many other advantages. It goes without saying that they are still expensive.
We must not forget to mention thermal printers. They use heat, a special kind of paper and electrosensitive methods. They are silent and considered to be inexpensive. However, some colour models that emulate HP (Hewlett Packard) plotters cost too much to be included in the same category.
Photosetters can be regarded as an attractive alternative. They do not print on regular paper, but on photographic paper or microfilm. They can produce output with a resolution of over 2,000 dots per inch. In addition, they are extremely fast. Although they produce the highest quality output, they have one important drawback: they are the most expensive.
Finally, plotters are a special kind of printer. Plotters use ink and fine pens held in a carriage to draw very detailed designs on paper. They are used for construction plans, engineering drawings and other technical illustrations.
- Контроль розуміння нового інформативного матеріалу: