The zipper is a paradigmatic example of a device that has been engineered to provide a high level of reliability and strength. Its inventor, Gideon Sundback, created a machine that utilized Y-shaped metal wire as an input, which was then cut into small pieces and pressed down to create an indent on one side and a bump on the other. This process, known as precision engineering, is what gives the zipper its remarkable strength. However, as with any device, there are potential weaknesses, and in the case of the zipper, inserting a pen between the teeth can create an opening, compromising its strength.
The machine's ability to space the teeth so precisely is what makes the zipper so strong. It takes Y-shaped metal wire as an input and cuts it into small pieces, then presses down on these pieces to create an indent on one side and a bump on the other. This process is repeated for each Y-shaped piece, which are then clamped onto fabric. The result is a zipper that is incredibly strong and reliable. However, as mentioned earlier, the zipper can be compromised by inserting a pen between the teeth, which can create an opening.
So, the next time you use a zipper, remember how strong it is and how it's made. But also be aware of the potential weakness of the zipper lock on your suitcase, which might not be as reliable as you think.
