Patent ID: 7081163

Claim:
A coating system for a web traveling in a web-travel direction, the coating system comprising: a slot nozzle from which a curtain of a coating material falls on the traveling web; a pair of guide elements flanking the slot nozzle and having confronting and vertical inner faces engaging and defining edges of the curtain; respective aspiration elements fixed at lower ends of the guide elements, having inner faces vertically aligned with and forming vertical continuations of the inner faces of the respective guide elements, and each formed with a vertical and inwardly open aspiration groove and with a transversely extending vacuum passage open into the respective groove; respective floors on the aspiration elements downwardly closing the respective aspiration grooves and each formed with a sharp inwardly directed edge closely spacedly juxtaposed with the web; and means for aspirating excess coating material from the curtain through the vacuum passages.