Patent ID: 6170934
Filing Date: 2001-01-09
Classification: B41J

Abstract:
A nozzle plate of an inkjet head printer, said nozzle plate having a plurality of nozzle holes arranged in the nozzle plate, each of the nozzle holes comprising:a tapered conical surface extending from a first opening of the nozzle hole to a conical surface end, said tapered conical surface having been formed by a punch having a corresponding conical punch surface with a cone angle of from 30.degree. to 60.degree.;a straight cylindrical surface extending from a second opening of the nozzle hole to a cylindrical surface end; anda rounded interconnecting surface smoothly interconnecting said tapered conical surface and said cylindrical surface, wherein said interconnecting surface has a radius in a range of between 0.02 mm and 0.06 mm, said radius of said rounded interconnecting surface being defined from the conical surface end to the cylindrical surface end.