Modern computer graphics could not do anythingone hundred percent replace the work of artists. They still do pencils on a piece of paper. The "tool" of their work has changed somewhat, it has become convenient and reliable. Regular pencil, collet, automatic, color or simple - they are all in demand and find their customers.
History of creation
The prototype of the writing tool itself has appearedin the thirteenth century. Of course, he was not much like a modern model - a thin silver wire on the handle was connected by soldering. More or less reminiscent of modern pencil appeared in the seventeenth century. Artists secured graphite rods between narrow planks, tied and wrapped with paper. So hands did not get dirty, and it was more comfortable to hold it.
At the end of the eighteenth century the French scientist andinventor Nicolas Jacques Conte invented the modern model. He was further refined; first, Lothar von Faberkastl solved the rolling problem by proposing a hexagonal shape of the product.
The rational approach of Americans to life pushedAlonso Townsend Cross to the idea of more economical use of the graphite rod. During operation, two thirds of the product is thrown away during sharpening. He “hid” the lead in a metal tube and pushed it as needed to the desired length. Collet collet - "great-granddaughters" and the simplest modern design of the same metal tube.
Principle of operation
Tsanga - Zange, translated from Germanindicates a device for fixing by clamping objects of cylindrical shape. The application is very wide: in scalpels, breastplates, on metal and woodworking machines, anchor bolts, various construction tools that require reliable fixation.
Pencil Collet got its name bymechanism that is used in its manufacture. This device is made of several “petals” tightly wrapping around the stylus. With the help of a spring, by pressing a button at the top of the product, the collet opens up and the stylus can be pushed to the desired length. After releasing the button "petals" are closed and hold the stylus in the desired position.
Collet pencil (2 mm - the mostcommon, there is from 0.1 mm to 5 mm) can be made of various materials. There are wooden, metal, plastic, combined enclosures. For convenience, rubber inserts can be installed in the girth area. They extend the body of the pencil and do not allow it to slide in the hand. They differ in quality eraser.
Varieties
Tool designed to applyimages in which you can change an graphite rod an infinite number of times are called a mechanical pencil. Used for drawing, writing, sketching. There are two types:
- automatic pencil;
- pencil collet.
In turn, the automatic is divided into several types, depending on the mechanism that feeds the rod:
- screw feed by turning any part of the body;
- shake or press (shake or press) to feed the rod, you need to shake the pencil;
- for the lazy, the button providing the stylus is located on the side of the body in the girth area.
The most practical consider the products in which the guide mechanism is not made of plastic. Strong pressure can provoke the withdrawal of the rod into the body.
Advantages
Consumers are the most independent experts. The goods that they use must meet the stated qualities. Here are a few of the basics of the collet pen:
- does not require sharpening;
- the rod can be “drawn” into the body and not be afraid of its breakage during any transportation;
- You can adjust the thickness of the slate;
- the presence of a replaceable eraser;
- the pencil trace lasts longer than ink;
- high reliability when pressed.
This device uses a huge amountpeople: students, students, specialists in the workplace. It is used by artists, both professionals and amateurs. It allows you to apply the contour width of only 0.2 mm.
Multipurpose purpose defines and diversityof choice. Mechanical collet pencils are produced by many well-known companies Paper Mate (Mexico); Penac (Japan), Pilot (Japan), Parker (USA), Attache, BIC (France), Pentel (Japan), Koh-I-Noor (Czech Republic), ICO (Hungary), Rotring (Germany). The mechanical pencil of the world famous brand will be an excellent gift for any celebration. A set of collet pencils, simple or colored, will delight both adults and children.
