Abstract
A conveyor device includes a frame with side parts aligned in a longitudinal direction and at least two transverse parts extending in a transverse direction. A drive roller is mounted in a stationary and rotatable manner on the frame with a drive roller axis extending in the transverse direction. One or more removable transport cassettes are inserted into the frame, each transport cassette having at least one return element extending in the transverse direction. One or more endless belt conveyors circulate around the drive roller, the at least two transverse parts and the one or more transport cassettes.