Patent ID: 6029349
Filing Date: 2000-02-29
Classification: B41J,Y10T

Abstract:
A method for making a plurality of adjacent ducts of a required duct depth and duct spacing in a duct plate for an inkjet print-head, the method comprising the steps of:using a toothed bit having a plurality of teeth with tooth spacing corresponding to the duct spacing;pressing a first tooth of the bit into the duct plate from a starting position;cutting a first groove in the duct plate by moving the bit and the duct plate relative to one another;returning at least one of the bit and the duct plate to the starting position;moving the bit relative to the duct plate in a direction generally perpendicular to a direction of the first groove in such manner that a subsequent tooth of the bit adjacent to the first tooth lies just above the first groove;moving the bit and the duct plate again relative to one another in such manner that the subsequent tooth is moved through the first groove and is pressed more deeply into the first groove than the first tooth while the first tooth simultaneously cuts an adjacent second groove; andrepeating both of the moving steps wherein consecutive teeth of the bit deepen the first groove further and wherein a last tooth of the bit produces the required duct depth.