The distributor of head box is square conical pipe header pipe inlet pulp and step orifice plate distributes pulp. Uniform pulp device is two uniform pulp rolls with different open porosity. Spraying pulp lip is hinged top lip plate (sing/double hing). Lip edge is with vertical small lip plate, and on the base is equipped with percentage display and precision worm gear box to adjust small lip plate fine-turning equipment. The biggest opening on the top lip plate is >70~90 mm, which is easy to clean and maintain. It is manual worm gear box to adjust top lip plate for smooth and easy.