Patent ID: 6267468
Filing Date: 2001-07-31
Classification: B41J

Abstract:
An ink jet printing apparatus comprising:a printhead substrate including a plurality of thin film layers, said printhead substrate having a first longitudinal side and a second longitudinal side opposite said first longitudinal side;a first ink feed slot formed in said printhead substrate and having a first longitudinal edge and a second longitudinal edge opposite said first longitudinal edge;a second ink feed slot formed in said printhead substrate and having a first longitudinal edge and a second longitudinal edge opposite said first longitudinal edge;a third ink feed slot formed in said printhead substrate between said first ink feed slot and said second ink feed slot, and having a first longitudinal edge and a second longitudinal edge opposite said first longitudinal edge;a first group of ink drop generators located adjacent said first edge of said first ink feed slot for receiving ink from said first ink feed slot, wherein no ink drop generators are disposed adjacent said second edge of said first ink feed slot;a second group of ink drop generators located adjacent said first edge of said second ink feed slot for receiving ink from said ink feed slot, wherein no ink drop generators are adjacent said second edge of said second ink feed slot;a third group of ink drop generators formed in said printhead substrate and located adjacent said first edge of said third ink feed slot; anda fourth group of ink drop generators formed in said printhead substrate and located adjacent said second edge of said third ink feed slot.