Box coding, sorting, stacking, and strapping have undergone a real transformation on the packaging line used for premium fruits at Fowler Packing Co. of Fresno, CA.
Keys to the upgrade are two TL-4 fruit labelers from Sinclair Systems Intl. (Fresno, CA) and two S.C.I.F.I.™ 3200 ink-jet marking systems from Matthews Intl. (Pittsburgh, PA). Integrated into the Sinclair fruit labeling system is a machine vision system that counts the pieces of fruit in each corrugated box and relays that data to the Matthews printer so that it can print that number on each box in both human-readable and bar-code format.
The new technology replaces a largely manual operation. Packers used to hand-load the fruit into corrugated boxes. They also hand-stamped four pieces of information on one side of each box: grower number, fruit type (peach, plum, pear, etc.), fruit type variety (Fancy Lady, June Lady, Rich Lady, etc.), and number of fruit pieces. Filled boxes with coded information were then folded closed by hand, stacked three-high by hand, and strapped by hand.
Manual loading of the fruit into the corrugated boxes is about all that remains of this approach. Operators send loaded boxes down one of two spurs; each includes an automatic pressure-sensitive fruit labeler from Sinclair and a snap-lock box closer from Klippenstein (Fresno, CA). Packers no longer need to stamp codes onto boxes because the Matthews ink-jet printer does it automatically. Before a production run begins, an operator pulls up a drop-down menu on the human/machine interface panel of the ink-jet printer. He then selects the grower number, fruit type, and fruit type variety appropriate for the run so that the printer’s PLC knows that these should be printed on the box. The operator then throws a switch at the ink-jet printer to make a connection with the Sinclair vision system upstream near the fruit labeler. The vision system uses a videocamera to count the pieces of fruit in a box, and it then sends that information to the ink-jet printer so that when that box gets coded, the correct number will be printed in both human-readable and bar code formats.
