The V-cone blenders did the job on the existing calcium and vitamin D production lines, but typically were taking 45 to 60 minutes per batch to achieve the desired uniformity, prompting the purchase of a 40 cu ft (1133 l) capacity stainless steel model 700-TS-40-SS Rotary Batch Mixer from Munson Machinery. The unit contains internal mixing flights that tumble, cut, turn and fold the batch, causing particles to recombine 288 times per minute, achieving batch uniformity in four minutes, or 11 to 15 times faster than the company's V-cone blenders. The company also gained production flexibility, as the mixer is equally efficient from 100% down to 15% of rated capacity.