Zipper Overview

ZIPPER

Before fully entering into knowing the meaning of the term zipper, it is essential to discover its etymological origin. In this case, we can state that it derives from the French, specifically from the word “crémailleré” that emanates from the Latin “cramaculus” and this, in turn, from the Greek “kremaster”, which meant “hanging”.

The term is used to refer to the closure used in clothing, bags and other products.

The zipper consists of two strips that, on their edges, have teeth that lock (to close) and unlock (to open) each other. To activate the mechanism, the person must move a slider or handle up or down or to one side or the other.

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Also called a zipper or simply a zipper, the zipper allows two pieces or two parts of the same piece to be joined or separated. Jackets (camperas), pants, wallets, suitcases (valises) and bags are some of the items that usually have zippers.

Thus, we can state that every zipper is made up of a textile tape or band, teeth, an upper stop, the chain, the handle, the separator tube, the reinforcement, the separator box, the lower stop, the lower part and the cursor or cart.

Within the field of fashion, it is important to know that there are different types of zippers, among which the following stand out:

-Metallic zipper. This has an attractive finish, is made of brass material and is widely used because it stands out for its resistance. In the same way, we cannot overlook the fact that it can be presented in a wide variety of colors.

-Multipurpose, which has the peculiarity of being made of polyester and is identified by the spiral-shaped teeth. It has different uses and can be found for sale with dimensions ranging from 10 centimeters to one meter.

-Injected zippers are those that are usually thick and also offer great resistance. Yes, his teeth are plastic. They can be found mainly in sportswear as well as in backpacks and bags and even in footwear such as boots.

In the field of mechanics, a rack is a bar that has teeth on one edge, making it possible to engage with a pinion to convert a rectilinear movement into a circular one and vice versa. In this type of mechanisms, the pinion meshes with the rack in such a way that when the pinion turns, the rack moves linearly.

The direction of automobiles, for example, has a rack. The steering wheel is linked to a steering column, in turn associated with a rack and pinion, which allow the movement of an articulated bar that is linked to the wheel support.

In a rack railway, the train advances from its coupling with the track through a third rail, which is precisely a rack. The pinion that is mounted on the locomotive transmits the force to this rail.

These railways are usually found in mountainous areas since the rack facilitates the ascent of the slopes. The system is also used on roller coasters.

ZIPPER