The most common use of paper clips is to clip files, put papers and folders together and play a fixed role. Paper clips can be strung into chains, buttons can be hooked with paper clips when they fall off, and paper clips can be ground out to make hooks for fishing. A paper clip can replace the key to unlock the lock.
Paper clips have many other uses in life, both practical and decorative, with various colors and many uses. Paper clips are generally made of stainless steel, white iron, copper and plastic, which are flexible and not easy to break.
Basic information:
Paper clips and paper clips are the same in a broad sense, and they are both paper holding tools made of metal wires bent back and forth. Paper clips seem to be the simplest of all inventions. It's just a short piece of curved metal wire for holding paper. But the paper clip was designed many times to make the shape we use today.
People used to pin pages together. But the needle will damage the paper, and it will also stab the user's fingers. A Norwegian inventor named John E. Walker thought he could solve this problem. At 190 1, he filed a patent application for a wire paper clip. Waller applied for a patent in Germany because there is no patent application system in Norway.
Almost at the same time, several inventors also proposed similar designs. However, all these early paper clips have some problems. When the clip is pushed, the protruding end of the metal wire will pierce the paper, which may even damage the paper more easily than the needle. It is also difficult to make a machine for making clips. Obviously, the labor cost of producing paper clips by hand will make the product price too high.