A conveyor belt is formed from a loop of material having opposite first and second side edges, and which when laid flat has opposite planar surfaces extending between the first and second edges. First and second sealing protrusions extend outwardly from the outer surface of the loop of material and extending continuously around the outer surface of the loop of material. In use, the sealing protrusions contact a hopper of a food patty forming machine to prevent the leakage of food material from the hopper.
