Drum screens are usually used to work with municipal waste, as they cope well with wet and sticky materials. However, the drum screen has a significant drawback when working with long and thin fraction, such as a plastic pen or a long chip: at the bottom of the drum, the object is oriented horizontally and cannot fall into the cells, however, when the ram is raised, the handle will fall down vertically and will easily pass into hole.
This problem is solved by vibratory screen: a sieve system with negative slope relative to the direction of movement does not allow a long but thin 2D fraction to fall into the cells. This allows you to significantly increase the intensity of screening.
Special fingers on the edge of each sieve stir up the material, preventing it from sticking together. Moreover, the fingers can be rubberized to prevent glass bottles from breaking. The design of the machine allows you to work with MSW, and, for example, with construction waste.