THIS MACHINE HAS BEEN DESIGNED FOR MANUFACTURERS WHO AIM AT HIGH QUALITY WHILE CUTTING DOWN SEWING TIME OF THE VENT FACINGS OF SHIRT SLEEVES OR POLO COLLAR FACINGS.THE VENT FACINGS ARE PRESSED IN PAIRS, AND ARE FOLDED IN HALF READY FOR SEWING.THE MACHINE IS EQUIPPED WITH A STACKING DEVICE WHERE THE READY-FOLDED PARTS ARE STACKED UP. DIFFERENT STYLES OF VENT OR POLO COLLAR FACINGS CAN BE PRESSED SIMPLY BY CHANGING THE DIE, AN EASY OPERATION.