Abstract: A combined label printer and application device is provided for labeling a plurality of individual product units with customized labels. The individual product units are conveyed through a data determining mechanism, such as a checkweigher or electric eye in order to identify data to be imprinted on the label. The information is conveyed to a microprocessor which converts the data into commands for a label printer. The printer in turn prints either alpha-numeric indicia, bar codes or other desired visual indicia on the label. The movement of the individual product units is coordinated with a corresponding label, and the label is applied to the product unit by means of a combined vacuum and air jet head. The individual labels, in a preferred embodiment, are coated with pressure sensitive adhesive, and are fixed on rolls to releasible backing strip. The individual labels are stripped from the backing strip and held temporarily on a vacuum head until the desired product unit is located below the head.