1. According to the position and number of tape sealed:
①i type sealing machine. It is sealed with a tape in the upper cover of the box and the outer hinge seam of the bottom. This kind of sealing, simple operation, but poor sealing.
②H type sealing machine. It is on the basis of the I-Type sealing box, that is, the two ends of the I-type sealing tape are sealed two tape, shaped like H, so it is called H-type. It can increase the strength of the box and seal performance, but the cost is higher.