Cobinders

Cobinders, also known as binder clips, are simple mechanical devices used to hold sheets of paper or other materials together. They are typically made of metal, with two long arms that can be pressed together to open the clip and a flat base that grips the paper. When the arms are released, they spring back to their original position, securing the papers firmly.

The design of a cobinder is straightforward yet effective. The base of the clip is a flat piece of metal that provides a stable surface for attachment. Extending from this base are two arms, usually made of spring steel. These arms are hinged to the base and are shaped to exert outward pressure when the clip is closed. When the arms are squeezed together, the tension is released, allowing the clip to be slid onto the edges of the material being bound. Once released, the spring action of the arms creates a strong grip.

Cobinders come in a variety of sizes, from small clips suitable for a few sheets of paper to larger ones capable of holding thicker stacks. They are commonly used in offices, schools, and homes for organizing documents, securing notes, and various other binding tasks. Their reusability and ease of use make them a popular alternative to staples or other permanent fastening methods. The simple leverage provided by the arms allows for a surprisingly strong hold, making them a reliable tool for keeping papers organized and together.