The Joker is built on a 24' 7"/ 7.5 m trailer with a single central axle that is easy to position even in tight spaces. The manually operated front support allows quick uncoupling, safe assembly and simple adjustment of the screen drum tilt.

The well-conceived design of the Joker requires only two conveyor belts-the width of the fine particle belt is the same as the length of the screen area. It starts underneath the drum and handles both collection and discharge. The coarse particle belt hinges out at a right angle to the machine. This arrangement results in extremely compact dimensions, both in transportation and in working position.

A fuel-efficient diesel power plant with engine monitoring delivers the power. The discharge belts can be raised and lowered simply and practically with a hand winch. The drum is moved by a hydraulic drive, and the sturdy roller chain with "drum grip" provides reliable power transfer.

The use of interchangeable screening segments made of highly wear resistant spring steel is particularly beneficial for multi-site use, as different mesh sizes can be transported with the screening machine. The segments are mounted on a core drum with a quick fastener (available for all Komptech drum screens).

The screen drum is freely accessible by opening the large side door. To change segments, the drive chain is loosened and the drum lifted out of the machine with suitable lifting gear. With the "Drum Grip" system, there are no teeth welded on the drum.