Product Description UT380 Automatic Pocket Wallet Mailer Diamond Envelope Flap Gumming Glue Coating Making Machine Videos Video demonstration only for reference Video: /watch?v=EZSvR_dqpxs Product Description Features: The machine is quite suitable for putting glue on the cover flap of envelope. It has functions of paper loading, adjusting the overlapping width by the stepless motor and glue coating by rotary roller to ensure that the glue is evenly spread on the envelope tongue. There is long drying unit by hot circulation winds to cure the envelope well Parameters: