A Coffee Pulper is an agricultural processing machine used to remove the outer skin and pulp from freshly harvested coffee cherries, leaving behind the coffee beans (seeds) covered with mucilage. It is an essential machine in coffee processing, especially in wet processing methods. The machine typically consists of a feeding hopper, a rotating drum or cylinder with a rough or abrasive surface, a stationary plate, a water inlet, a motor (or manual drive), and separate outlets for beans and pulp.

In operation, freshly picked coffee cherries are fed into the hopper, often with a small flow of water to assist movement and reduce friction. The motor drives the rotating drum, which presses the cherries against the stationary plate. Due to the pressure and friction, the outer skin and pulp are squeezed off while the beans are separated without being damaged. The removed pulp is discharged through a separate outlet, while the beans pass through another outlet for further processing, such as fermentation, washing, and drying. The machine ensures efficient, fast, and uniform removal of pulp, improving the quality of the coffee and reducing manual labor.