The stack stapler is used to join a large number of paper sheets into a single unit, then cut into individual sheets. Most staplers are used to join multiple sheets of paper. Paper staplers come in two distinct types: manual and electric. Manual staplers are normally hand-held, although models that are used while set on a desk or other surface are not uncommon. Electric staplers exist in a variety of different designs and models. Their primary operating function is to join large numbers of paper sheets together in rapid succession. Some electric staplers can join up to 20 sheets at a time. Typical staplers are a third-class lever.
Some staplers are designed to be used as a two-sided stapler. These staplers are made with dual-sided staples, designed to be used to staple two pieces of paper together. Some staplers have two separate feeders in the back, allowing for two-sided stapling. Paper staplers can also have a manual or electric feed. Electric feed paper staplers are generally better at feeding paper evenly and flat against the stapling surface, and have heads designed to work with a specific number of staples.
Paper staplers that have an electric motor do not use a compression spring. In fact, few electric staplers use a spring, instead relying on one or more metal coils to hold the striker in position.
Paper staplers are normally of two varieties: manual and electric. A manual stapler is where the operation of the tool is done by hand, where the lever is driven by the fingers. An electric stapler is where the tool is electrically powered and the lever is driven by an electric motor. In both cases, the lever is usually spring-loaded and the paper is pressed between the anvil and a sharp knife edge. By depressing the lever, the paper is driven through the knife and pressed between the anvil and the staple. The paper is then released and the staple is ejected by the spring. The staple is then driven into the paper and is retained by the anvil. In some cases, the paper may be folded between the knife and the anvil before the stapling operation is completed. 827ec27edc