APPARATUS AND METHOD FOR DISPENSING LIQUIDS

摘要

The present invention relates to a dispensing apparatus comprising first and second valve units (9; 10) each having an output for delivering a liquid under pressure; a liquid application means coupled to said valve units, the liquid application means having a contact surface (2) and at least two separated, co-extensive outputs (5; 6) in said contact surface respectively communicating independently with said outputs of said first and second valve units; said co-extensive outputs mouthing in succession into a channel (7) which is recessed from said contact surface; said channel mouthing in a trailing end of said contact surface and having a flow cross-section that increases stepwise for every additional liquid that is successively discharged through said co-extensive outputs. The invention also relates to a method for dispensing liquids onto a substrate moving in a feed direction under contact with a dispensing apparatus, comprising the step of forming by said apparatus a string of combined liquids on the substrate, wherein the second liquid is formed to a string that encapsulates the first liquid previously dispensed to the substrate.