Self-cleaning roller screen

A method for cleaning of a roller screen transporting and screening particles by means of at least three rotating rollers comprising installing in succession the at least three rotating rollers at given clearances and arranged transversally in relation to a transport direction of the particles to screen a desired range of particle sizes, wherein at least one roller changes its circumferential velocity such that for a defined time period for at least one pair of neighbored rollers one roller has a higher circumferential velocity than the other and/or its rotational direction over time at defined time intervals for defined time periods such that for this defined time period for at least one pair of neighbored rollers both rollers roll in opposite rotational directions and that at least one roller is braked at defined time intervals.

A roller screen to transport and screen particles, comprising at least three rotating rollers installed in succession at given clearances and arranged transversally in relation to a transport direction of the particles, wherein at least one roller features is connected to a brake to change its circumferential velocity and its rotational direction at defined time intervals.