METHOD AND APPARATUS FOR APPLICATION OF A MATERIAL TO A SUBSTRATE

摘要

An apparatus for applying a material to a substrate includes a housing (22) having an inlet passage, a plurality of exit openings (36), and a recess (25) in fluid communication between the inlet passage (34) and the exit openings. A valve element (24) is disposed in the recess wherein the valve element (24) includes a first portion and a second portion axially displaced from the first portion. Means (28) are provided for moving the valve element (24) in the recess such that the first portion provides continuous fluid communication between the inlet passage (34) and one of the exit openings (42) during movement of the valve element (24) and the second portion provides intermittent fluid communication between the inlet passage (34) and another of the exit openings (44) during movement of the valve element. A method of applying a material to a substrate is also disclosed.