The Crown Model IV Extractor is a continuous counter current immersion type extractor that employs a shallow bed approach to extraction. It is designed for granular materials that have a higher density than the solvent, and will therefore sink in the solvent. It does not use screens. The basic horizontal fabrication houses a unique patented en-masse type conveyor system, which draws the material along the smooth extractor bottom. Material is immersed in solvent flowing from the other direction keeping the solids wet at all times. Applications of this system include specialty extraction, algae extraction, soy protein isolates and concentrates and specialised solvents extractions.