You can combine several sheets of paper so that the paper looks like a book. The purpose of the design is to make the user's life simple and comfortable. That work is easy, you have to look at the product, make it easy to use, not too much thought. This is a bad design if the user thinks this particular round paper clip is bad. This is the process people need. All of these designs are designed by engineers. What is important is that there was not much design before, but today's story is different.
Always, that is until the clip fails. That is always the case. There are many automatic pencils with broken clips. They bothered my desk and used my abuse as a witness. Moleskine's proprietary mechanical pencil is designed to be mounted on a laptop with pretty powerful clips. However, this pencil has a rectangular cross section. Maybe it lies flat on its lid and feels comfortable for the notebook. But it certainly is not suitable for human hands. In the field of mechanical pencil, what kind of new idea is found? It was only in the 1980s that Henry Peter Roschi built what he called "real robot pencil - send a very fine pencil by writing himself". Until today, it was brought about by the use of mechanical pencils. Sorry for regret: When the mechanism inside the pencil is fixed, when it is too short to protrude from the tip, you must throw away the last core.
There are another vulnerable part in many mechanical pencils. If there is a clip on the barrel, it is often called a "pocket clip". But I can not limit my pencil clip to my pocket. I clip the mechanical pencil on the inside page of the book I am reading. It can be used as a bookmark or as a useful tool for edge tools. Fasten the mechanical pencil to the hard cover of the Moleskine notebook. The clip usually strips the inner page. However, it is worth mentioning that there is always a pencil in the notebook.
Paper clips are a device that has existed anywhere that has existed for centuries. For decades, the gemstone clip has been successful compared to other paper clip designs. All plastic paper clips began to be used for mainstream consumption in the 1950s and subsequently plastic coated clips are only completely covered with plastic rather than plastic. A company in Pennsylvania began selling huge jewelry clips that can hold over 100 sheets of paper. None of these developments is very different from the popular design that consumers can easily identify. This leads to the claim that the Gem folder is already an ideal design and can not develop any further.