At the heart of these machines is the rotary carton pick-up system which grabs the carton from the magazine, pre-breaks it by counter suction, and then loads it smoothly into the carton chain. The carriers in the chain then hold the carton squarely till product-loading and carton-closing is completed. There are 4 models in the Merlin series, each fitted with one to three rotary arms, depending on the model speed.