Patent ID: 7610679
Filing Date: 2009-11-03
Classification: B41J,Y10T

Abstract:
1. A method of producing an inkjet printhead including a cavity unit having therein ink passages and formed by stacking a plurality of kinds of flat plates each of which has a specific ink-passage pattern for constituting the ink passages, the method comprising: preparing a large-sized material sheet for each kind of a plate, such that the material sheet comprises a plurality of plate regions, each of which corresponds to one individual plate of the kind, and which are contiguous to one another such that a reserved region for cutting is between each adjacent two plate regions and there is left no margin at a periphery of the material sheet; obtaining a laminate of the material sheets by stacking the material sheets of respective kinds of plates, with the corresponding plates in the respective material sheets aligned in a direction of stacking of the material sheets; and obtaining a plurality of individual laminates by cutting the laminate of the material sheets at the at least one reserved region into the individual laminates; wherein the preparing the material sheet comprises forming in the material sheet at least two cutouts at respective positions at least one of which is on the periphery of the material sheet; and wherein the obtaining the laminate of the material sheets comprises placing a positioning pin that extends along a direction of the stacking of the material sheets at a space formed inside each of the at least two cutouts.