Method of producing food patties using multiple row molding apparatus

A method of operating a multiple row molding apparatus provides greatly increased production of food patty machines. The method comprises the steps of providing a mold plate having front and back cavities in longitudinal and transverse alignment. When the mold plate is at a retracted position, multiple fill slots enable flow of the food product from a manifold simultaneously to all the cavities. At an extended position, all the patties are ejected simultaneously by a knockout mechanism. The fill slots may be either one long fill slot, or multiple short fill slots in communication with respective cavities. In a modified method, food product flows through a single fill slot and communicates only with the front cavities when the mold plate is in its retracted position. As the mold plate advances toward its extended position, the row of back cavities passes over the fill slot and enables the food product to flow into the back cavities.