utilized to manufacture panels having a random rake surface wherein the panels have different configurations and shapes than the panel shape and form depicted in the specification and drawing referring especially to fig1 4 and 5 the apparatus incorporates a conveyor 10 comprised of a frame made up of side rails 12 and 14 supported on legs 16 the side rails 12 and 14 are interconnected by cross members such as cross members 18 to define a rigid support frame rollers 20 are arranged at spaced intervals extending between the side rails 12 and 14 the rollers 20 support a mold or form which is shown in phantom in fig1 as form 22 the form 22 receives the fluid material which defines the panel e g mixture of cement and aggregate positioned beneath the conveyor 10 are first and second form driving assemblies 24 and 26 each assembly 24 and 26 has substantially the identical construction and thus the following description with respect to assembly 24 is equally applicable to assembly 26 the assembly 24 is mounted on a platform 28 the platform 28 supports a motor 30 which has an output or drive shaft that acts through a gear box 32 and connects to a drive chain 34 mounted within a housing 36 for driving a friction wheel 38 the wheel 38 is supported on an axle 40 journaled.