The lower bottom edge of the plug is equipped with a cutout, and the depth of the plug recessed into the bag is about 20mm according to the modeling needs, the deeper the plug is recessed into the bag, the more the plug overlaps with the fan; the bottom of the bag is recessed into the bag, and the height from the bottom edge is about 10mm, to ensure that the sewing machine presser foot can pass smoothly from the bottom of the bag to the fan when seizing the thread. The design of this structure is mostly reflected in the changes of the bottom edge of the plug and the shape of the fan. The fan is mostly square or trapezoidal, the bottom angle is right or rounded, and the bottom edge of the plug is cut in a straight or curved line.
This structure of the package is mostly sewn by frontal sewing method. First of all, the additional design on the fan face parts are done well, including the label, logo, pockets, zipper, buckle lock, etc., and the pouches on the lining, various pen inserts, card inserts, glasses pockets, cell phone pockets and other subsidiary parts are done well, and if there is a partition, the partition needs to be done well for backup. The fabric of the fan, the bottom of the bag, and the plug are glued together with the lining in the way of flat bonding, and the partitions are sewn together with the plug and the bottom of the bag after the edges are folded. Then, use the front stitching method to sew the fan face together with the plug and the bottom of the bag, paying attention to the bottom corners must be sewn smoothly. Finally, the upper part of the bag is folded and sewn together to complete the bag.
The bottom of the plug is rounded bag shape exquisite, novel structure, according to the analysis of the effect, the plug incision is arc, and the bottom of the bag with the arc of the plug incision and the bottom edge of the plug sewn together, so the size of the width of the bottom of the bag by the length of the arc of the plug incision decided. This structure needs attention in the production: the whole arc cut line should contain two straight sections, so that the presser foot can pass smoothly when the bottom of the bag is sewn with the fan surface. The sewing method is similar to that of the rectangular fan-surface package body.
