INK JET HEAD AND INK JET RECORDING DEVICE

摘要

PROBLEM TO BE SOLVED: To stabilize jet volume of ink as consistently as possible even though a taper angleθof a taper portion 14a varies to some extent when a nozzle 14 to jet ink in a pressure chamber 4 toward a recording paper 41 is to be formed of the taper portion 14a and a straight portion 14b. SOLUTION: The nozzle 14 is designed to have the taper portion 14a with a taper angleθof 50 deg. to 110 deg. (preferably 60 deg. to 90 deg.).