This marker is designed to straddle an existing belt conveyor and requires the drive to the marker and timber to be exacted from the belt.  The marker can operate with a maximum of four roller markers which receive operating signals issued from the Strength Testing Machine via a central control console arrangement.  Each of the rollers is actuated to the timber surface by a pneumatic operated cylinder and inking is pressure fed from separate tanks,  allowing different  colours to be used for each roller.  
The marker is available in three formats incorporating 2,3 or 4 markers