Self-cleaning nozzle for applying adhesive to a moving web

摘要

A nozzle for applying a liquid adhesive to a web moving continuously in a travel direction has a body having a passage forming an outlet opening generally transversely to the direction immediately adjacent the moving web at a face of the body so that the liquid adhesive flows through the passage and out the outlet end onto the moving web. Structure on the face of the body forms immediately upstream of the outlet a porous region. Air is fed through the structure and out of the face to form between the region and the web an air cushion.

主权项

1. A nozzle for applying a liquid adhesive to a web moving continuously in a travel direction, the nozzle comprising:
a body having a passage forming an outlet that opens generally transversely to the direction immediately adjacent the moving web at a face of the body, whereby the liquid adhesive flows through the passage and out the outlet onto the moving web; structure forming on the face of the body immediately only upstream of the outlet a porous region; and means for feeding air through the structure and out of the face to form between the porous region and the web an air cushion only upstream of the outlet and hold the web out of contact with the nozzle.