Patent ID: 6315389
Filing Date: 2001-11-13
Classification: B41J

Abstract:
An ink jet printing apparatus comprising:a printhead substrate including a plurality of thin film layers and having a first edge and a second edge opposite said first edge;a first plurality of ink drop generators defined in said printhead substrate adjacent said first edge and having a first predetermined center to center spacing along a reference axis;a second plurality of ink drop generators defined in said printhead substrate adjacent said second edge and spaced laterally, relative to the reference axis, from said first plurality of ink drop generators, said second plurality of ink drop generators having said first predetermined center to center spacing;a third plurality of ink drop generators defined in said printhead substrate and having a second predetermined center to center spacing along said reference axis that is greater than said first predetermined center to center spacing;a fourth plurality of ink drop generators defined in said printhead substrate and spaced laterally, relative to said reference axis, from said third plurality of ink drop generators, said fourth plurality of ink drop generators having said second predetermined center to center spacing along said reference axis; andwherein said third plurality of ink drop generators and said fourth plurality of ink drop generators are located between said first plurality of ink drop generators and said second plurality of ink drop generators.