A core compressor is disclosed that includes a housing, a first pair of rollers and a second pair of rollers, both positioned in the housing. Each of the pair of rollers includes an upper roller and a lower roller. The first pair of the rollers is located proximate to a first end of the core compressor, and the second pair of the rollers is located proximate to a second and opposing end of the core compressor. The upper roller and lower roller of the first pair of rollers are located a first distance apart. The upper roller and lower roller of the second pair of rollers are located a second distance apart. Each roller includes at least one row of teeth extending generally perpendicularly away from the surface of the roller.