Advantage compare with straight horns structure:

1.No gap between each horn, no need to care that horns can touch and burn every day, also no wrinkles on fabrics while working.

2. For straight horns structure, low cost, gap between each horn must be 1~1.5 mm. If too small, horns will touch easily each other and ultrasonic box& horn will burn. If too big gap, you will see the wrinkle in below pictures